i would like to turn off devices on my TG01 off to save power:
i use my TG01 just as a pocket pc, i.e. i have no sim card inserted. nevertheless, battery is down at 40% after 1 day of standby, even when in flight mode.
as i heard that flight mode does not really work on the TG01, i would like to selectively turn off devices like phone (gsm, 3g), wlan, bluetooth, motion sensor (all the things i don't need), while keeping the gps still working.
is there a rom version or a tool that allows me to really turn off devices separately?
or is there a rom version, specially made for people just using the TG01 as a ppc?
so far, i always have to keep bluetooth running, as the gps does not seem to work as soon as i turn bluetooth off (no idea why it is like that). maybe it's bluetooth that drains so much power...
i actually run the wm6.5.5 v5 rom from novembre5
or is there anything else i can do to save power?
btw:
i tried to measure the current, the device draws from the battery, to find a setting that is the most power saving. unfortunately, all battery meter tools i tried are not able to show actual current. is there a tool that supports the TG01?
please help!
Some tips...
bongo3 said:
i would like to turn off devices on my TG01 off to save power:
... i would like to selectively turn off devices like phone (gsm, 3g), wlan, bluetooth, motion sensor (all the things i don't need), while keeping the gps still working.
is there a rom version or a tool that allows me to really turn off devices separately?
or is there a rom version, specially made for people just using the TG01 as a ppc?
Click to expand...
Click to collapse
Use wireless manager to turn off/on phone, bluetooth and/or wi-fi separately.
In settings/motion sensor settings disable autoscreen orientation, in settings/sleep mode indicator tick off, in settings/power saving settings un-tick automatic brightness and choose a brightness level according to your needs and so on...
Does not really help!
...and with all those things disabled, the battery is down at about 40% after 1 day in stand-by (when the TG01 has not been used for 1 day)!
so i think there's still something drawing a lot of power!
to compare:
my hp ipaq 214 ppc, running wm6 too, is down at 40% after being in stand-by for 2 weeks, i.e. it's power consumption within 2 weeks is about the same as the TG01's power consumption within 1 day, when in stand-by...and the ipaq is much older than the TG01!
so it seem's obvious that the TG01 just tells to have everything turned off, while still having things running...
Very interesting...
Why don't you keep this thread opened in TG01 General , for instance? I'm afraid that your question it's not related with ROM development...(wrong subforum)
Best Regards
i thought there might eventually be a rom version with the PHONE FUNCTIONALTY DISABLED, or with tighter hardware/power control!
or maybe, there is a rom version OPTIMIZED FOR LOW-POWER!
that's why i placed the thread here.
if there is no way to get help in the rom section, this thread can be moved to general, but i have no idea how to do this.
thanx!
bongo3 said:
i would like to turn off devices on my TG01 off to save power:
i use my TG01 just as a pocket pc, i.e. i have no sim card inserted. nevertheless, battery is down at 40% after 1 day of standby, even when in flight mode.
as i heard that flight mode does not really work on the TG01, i would like to selectively turn off devices like phone (gsm, 3g), wlan, bluetooth, motion sensor (all the things i don't need), while keeping the gps still working.
is there a rom version or a tool that allows me to really turn off devices separately?
or is there a rom version, specially made for people just using the TG01 as a ppc?
so far, i always have to keep bluetooth running, as the gps does not seem to work as soon as i turn bluetooth off (no idea why it is like that). maybe it's bluetooth that drains so much power...
i actually run the wm6.5.5 v5 rom from novembre5
or is there anything else i can do to save power?
btw:
i tried to measure the current, the device draws from the battery, to find a setting that is the most power saving. unfortunately, all battery meter tools i tried are not able to show actual current. is there a tool that supports the TG01?
please help!
Click to expand...
Click to collapse
I am also enjoyed my TG01 without a sim card and then be surprised that it holds several days without being charged. So if your battery falls on a day not to use it, then the battery has a reduced capacity. Try several cycles - full charge, use it while off and only then put it to charge. Maybe this will help you.
hm 'holds several days without being charged' sounds good
so how are your settings for bluetooth, wlan and phone?
btw: i bought another battery because i first thought that it is a battery problem - but now it's the same with both of them.
i also turned the phone on once (but without a sim card), and it looked like the battery discharge was about the same as in flight mode.
i read somewhere, that because of a bug, the TG01 turns power of the phone chip on, when the device is set to flight mode, and therefore bluetoot or wlan has to be turned on to really turn off the phone (and save power).
on the other hand, i would like to use the gps, but the gps does not work when the unit is configured to flight mode.
so what is the ideal configuration for reducing power consumption?
thanx!
bongo3 said:
to compare:
my hp ipaq 214 ppc, running wm6 too, is down at 40% after being in stand-by for 2 weeks, i.e. it's power consumption within 2 weeks is about the same as the TG01's power consumption within 1 day, when in stand-by...and the ipaq is much older than the TG01!
Click to expand...
Click to collapse
I believe you don't need a 1ghz processor device if you compare it with a 624mhz.
For tg01 you can even limit cpu speed for better power consumption in power saving settings...
i think when in stand-by, the TG01 cpu does not clock at 1ghz.
i compare stand-by power consumption, i.e. the cpu has almost nothing to do then.
bongo3 said:
i think when in stand-by, the TG01 cpu does not clock at 1ghz.
i compare stand-by power consumption, i.e. the cpu has almost nothing to do then.
Click to expand...
Click to collapse
It's obvious you're comparing a ferrari idling with a (new)volkswagen beetle ...
...both standing in the garage!
bongo3 said:
...both standing in the garage!
Click to expand...
Click to collapse
Idling means with engine on, even in the garage!
I hve been using my phone on power saving mode from 2 days to save battery and to hve more life out of it. I wana ask tht it is ok to use it continuously on power saving mode forever??
Any ideas??
No problem in using power mode all the time. It's a feature Samsung enables to save battery
Yep. Can't see a problem except the expected performance downgrade etc.
Sent from my GT-I9300T using xda premium
Personally I hated the power saving modes in every smartphone i had cause it affects performance. I will buy a spsre battery and a charger. If you are ok with the performance in power saving mode you should use it!
Enjoy your phone to its maximal potential. Don't let the battery saving issue to disturb your user experience.
Sent from my GT-I9300 using XDA
My phone doesn't decrease in performance with saving mode enabled. It is always fast.
Sent from my GT-I9300
CreekDirt said:
My phone doesn't decrease in performance with saving mode enabled. It is always fast.
Sent from my GT-I9300
Click to expand...
Click to collapse
Not the case with mine, I notice a decrease in performance. It most likely under clocks the CPU...
In regards to the original question, no there is nothing wrong with leaving the phone in power saver mode. In fact you could probably argue that its better as the phone creates less heat.
Ideally I'd like to overclock mine
Well there is no such thing as saving power without sacreficing preformance. (unless you undervolt it or use more power effectient drivers)
But you should be ok running in power save mode all the time, although I do question why you bought a top of the line smartphone then. I think you would have saved more power (and money) buying a lower end phone.
It does govern the cpu. You can uncheck it. I leave mine checked.
Sent from my GT-I9300
Truely speaking i cant see diiference of even 1% in comparison to power saving and normal mode. Any one knows y battrey depleting though good but at same rate in both modes??
juice defender app does a good job for me. i use the basic settings but you can tweak it to save more battery.
Power saving appears to cap the clock speed at 1.0 GHz rather than 1.4 GHz and it may also disable cores, too. Most of the time it feels just as responsive to use. It is less snappy for some apps and benchmarks quite a bit slower, but I feel I'm splitting hairs as it still feels quicker than my last handset.
I see two days of moderate use with Power Saving on. I don't quite see two days with it off, but the difference is probably not statistically significant and the device is still new.
Power Saving
im using a power saving application on Xperia S ... is it okay to keep it working all the time??
thank you ....
ButterMaker: first of all, wrong forum, also battery saving apps are known to interfere with androids way to handle memory so I would say no
CuttyCZ said:
ButterMaker: first of all, wrong forum, also battery saving apps are known to interfere with androids way to handle memory so I would say no
Click to expand...
Click to collapse
Yes, should not use battery/ram optimization apps. They interfere with androids core system.
I uninstalled all these apps after trying and researching. They eat more battery then they save. I only use battery stats apps to keep a log of battery drain.
Now I easily get 40+ hours on my S3 with moderate uses.
Links pointing to androidbatterylife.com are DOWN FOR GOOD!
Android Battery Life, a pretty successful website has been made in order to help android users achieve better battery life while still using many functions and apps. All of these guides are available, with screenshots, at www.androidbatterylife.com
It's my 2000th post here on xda, and I wanna make it special
PORTAL! http://www.xda-developers.com/android/battery-saving-mega-guide-celebrating-users-2000th-post/
A lot of users are thinking that everything mentioned should be applied. You don't have to apply all of them, just apply what you think works for you. This is more of an index of guides, if you will.
Yes, this is in the Android Q&A, Help & Troubleshooting because of the word "Troubleshooting"... I'm shooting your "Low battery life" trouble in the face.
So let's begin:
The guide is split into 3 parts: Easy, Medium, and Advanced.
First up is... you guessed it..
Easy
Screen / Display LINK
If you go to Settings>Battery, you’ll clearly see that “Screen” has the biggest bar of about 40-60%. The bigger the bar (and the number), the bigger the battery drain. We’ll try to lower that bar as much as we can.
Brightness
First of all, to reduce the battery drain caused by the display, click on the Screen button, then click display (it’s the same as going to Settings>Display), then click on brightness, untick Auto-Brightness if it’s ticked and lower the brightness to minimum.
Explanation: A brighter screen means the screen is emitting more light, which consumes more battery. So lowering the brightness makes the screen use less battery juice.
Wallpaper
Second thing to do to reduce the “Screen” battery consumption is having a Static Wallpaper, and not a Live Wallpaper. So go to Settings>Display and click Wallpaper, and pick any wallpaper you want except the wallpapers from the Live Wallpapers list.
Explanation: Live Wallpapers use the CPU (and possibly the GPU) to make the image move. So the phone is using the CPU to process these images, which means more battery sucking, and we don’t want that.
Sleep
Again, go to Settings>Display, and click Sleep (aka screen timeout) and set that to something less than 1 minute. I personally use 30 seconds and it’s good enough for day-to-day use.
Explanation: The more time the screen is on, the higher is the battery usage, because the screen won’t be using the battery when it’s off…
Framework Animation
Fourth thing to do is disable the Framework Animations. Framework Animations are the animations you see when you switch from an app to another app, or when you press home, or back, or recent apps buttons. To turn those off go to Settings>Developer options (if you don’t see that, then go to About Phone and press the Build Number button 8 times, then go back), scroll down to drawing section, and set Window animation scale, Transition animation scale, and Animator duration scale to “Animation off”.
Explanation: Framework Animations use the GPU (and possibly the CPU) to draw the frames of the animations, so by turning them off, you’re pulling some load off of the GPU and CPU to make the battery life better.
Widgets
Believe it or not, widgets can greatly affect battery life, it's because they update themselves regularly. This can wake up the phone a lot of times. So the best way to prevent this is to remove all the widgets on the homescreen.... and maybe keep the ones that don't update themselves much.
Remember, everything that’s shown on-screen that isn't app related is registered as “Screen” in the battery window. So to lower that, you have to compromise every little thing that’s shown on the screen.
Click to expand...
Click to collapse
Google Services LINK
One major issue you may face with Google Services is the location battery drain. This was born in Android 4.2.2 and can be easily fixed by just unticking a button.
Problem
The real problem is, in one word, Location.
Google Services such as Gmail, Now, Maps, and Google+ constantly polls your location using your wifi (if you're connected) or your cell network. And every time Google Services poll your location, your battery gets affected. So what's the solution to that?
Solution
Further research by Galaxo60 proved that going to Settings - Location Settings (or Location on android 4.4), and unticking WiFi & mobile network location (or setting the Mode to Device Only) prevents Google Services from polling your location, thus preventing the battery drain
So disable the WiFi & mobile network location option, and actually tick and turn on GPS satellites. (It's just like setting the Mode to Device only on KitKat)
But why do that? Why should I turn on GPS?
Picture taken using Android 4.4 KitKat
Explanation
Google Services don't use your GPS to poll your location, so your GPS actually stays offline most of the time; and the reason you should enable GPS is to "Let apps that have asked your permission use your location information".
Click to expand...
Click to collapse
Go Dark LINK
Some devices have AMOLED or SAMOLED (Super-AMOLED) screens, like the Samsung Galaxy SII and the Motorola Moto X. The following method is helpful for these kind of devices.
You may check what's your screen type to see if it's AMOLED or not. If it's not, this method won't help you achieve better battery life, but may help your eyes
What's AMOLED?
AMOLED is a screen type designed to get the highest contrast a screen can get to. Black pixels turn themselves off, unlike the IPS screens that always require a backlight. So AMOLED has less battery consumption than most screen types.
What to do?
Try turning everything as dark as you can. So make the wallpaper have as much black areas as possible, and use dark apps. The best way to convert most apps to dark apps is downloading Team Black Out Updater. From that app, download the apps you want to make them darker and install them. Some apps require having root because you have to flash them via recovery.
This consumes less power
This consumes more power
Explanation
By turning most things dark/black, more pixels in the AMOLED screen will turn off, thus lowering the power consumption caused by the screen.
Remember, this is only for AMOLED screens, IPS/LCD screens will still consume the same power from the battery.
Click to expand...
Click to collapse
Turn Off Auto-Sync LINK
Auto-Sync constantly checks the data on the phone and the data on the cloud, and adds the missing files. In other words, Auto-Sync = wasted battery.
Turn off Auto-Sync
Go to settings, scroll down to you google account, tap it and tap on your gmail. Then uncheck all the items on the list.
This is wrong. Now untick them!
Explanation
Auto-Sync consumes a lot of data and battery. By unchecking the items, Auto-Sync will turn off, and thus saving battery AND data!
Click to expand...
Click to collapse
Turn Off NFC LINK
NFC is wireless, and wireless consumes battery. So turning off NFC will make the battery life slightly better.
NFC off when not needed
If you don't use NFC, go to settings > more > and turn it off. Android beam will grey out because it needs NFC, we don't need that either.
Explanation
NFC consumes a lot of battery if you keep your screen on most of the time. So by turning it off, we're improving battery life while the screen is on.
Click to expand...
Click to collapse
NO Task managers/Hibernators LINK
Yes... I know... Weird right? Don't be misguided, and understand what's happening inside android before doing anything.
Uninstall / Disable Task Managers / Killers / Hibernators
If you have any Task killer, or Task manager apps installed, either disable them if you can, or uninstall them.
Explanation
Android learns the way you use it. It knows which apps you like best and pre-opens them and puts them in RAM so that they get opened faster. Android keeps a log of how much time you've been spending on an app.
By using a Task killer, you're breaking this log, thus preventing Android from learning how you use it. The results?
Android will be loading every app you open from scratch.
Android will get slower.
Android will be wasting battery.
So uninstall those "battery killers" and let Android do the work instead.
Click to expand...
Click to collapse
Use ART LINK
Yes... ART... Not art, but ART... It's an Android 4.4 KitKat specific thing...
What is ART?
ART is a runtime replacement of the Dalvik runtime. It's the way the phone handles apps. Dalvik used to install apps fast, and conserve some space after the installation, but it compiles the app as soon as you open it, and runs it on a Virtual Machine (if it's not a native app).
ART pre-compiles the app on installation, which takes up a little bit (teeny tiny) more space, but makes apps faster to open, and over all performance better.
Switch to ART
Go to settings, developer options, and tap on select runtime, then use ART and reboot. It'll take some time to finish booting the first time it's running ART, but when it's done optimizing apps it'll be worth the wait.
Explanation
ART demands less CPU power to process things over time. It pre-compiles apps just once so that when you open an app, the CPU won't work as much to compile the app just-in-time (JIT). So, less CPU work, less battery consumption, more battery juice, and more performance!
Click to expand...
Click to collapse
Pick the correct charger LINK
I can't put direct links to chargers, so go HERE to the relevant page and see the chargers from there.
Is a fast charger better? or is it the slow one?
Use the Right Charger
A slow charger relaxes the battery, making it last longer when it fully charges. So, for a better battery life, use a slow charger at night when you're sleeping, or when you don't need to charge it quickly.
I recommend using this charger*: it's small, looks good, and it's slow with a 1A power output... Perfect for what we want.
If you're in a hurry, and your phone's battery has little juice left, you may want to charge it pretty quickly. In this situation, you won't care about the relaxation of the battery, so you should use a fast charger.
Something like this charger* should help a lot in achieving what you need. It also has a second slot it you have to charge another device. Use the A slot to charge faster with its 2.4A power.
You can also use a car charger if your phone's battery suddenly dies while you're not home.
This car charger* is perfect because it's fast enough to revive your phone and gives you enough juice to save the day.
So be wise and use the right charger for the right situation, so that you can achieve the best battery life possible.
Click to expand...
Click to collapse
Have a Spare Battery / Power Bank LINK
Sometimes, your battery will die, whatever you do...
Have a Spare Battery
In that case, if you have a phone with removable battery like any current Samsung device, equipping another spare battery could be very useful. If your battery is almost dead, just turn off the phone, open it up, and put your spare battery in. Voila, insta-charge
Have a Battery Bank
One great gadget to own with your phone is a backup power bank. This portable power bank (see link of the page HERE) is awesome because it's universal, and has a 13000 mAh capacity which can charge your phone about 5 times!
So if you don't want to scratch your head to do tweaks, you can use spare batteries or power banks to save the day
Click to expand...
Click to collapse
Know How to Use Android LINK
It's all about how you use it...
We see a lot of users that use Android the wrong way. We see people setting their screen timeout to 30 minutes because "whenever I want to chat, the screen keeps turning off". We also see a lot of users, even devs and power users, constantly pressing the back button to go home.
Know How to Use Android
If you have the screen problem where whenever you want to interact with the screen, it turns off, don't turn the screen timeout up. Turn it down, so that the screen turns off sooner, and saves battery.
And to go home, there's a button for that for a reason! Use it! Pressing back over and over again closes the app, and clears it from your device's RAM. When you re-open the app, it will open from scratch, so your phone will be slower, and will consume more battery since it's using more CPU power.
So use the home button, try to keep as much apps in RAM as possible, stop "clearing all" apps from RAM, and save battery!
Explanation
RAM, either full or empty, consumes the same amount of electricity, unlike RAM in computers.
The CPU copies data from storage to RAM and then runs the app. If the app is already in RAM, the CPU won't reopen it, it'll directly use it.
So making the RAM full of opened apps helps the CPU. The phone becomes faster, and the need of electricity running through the CPU to open the app is now nonexistent.
Also, Android keeps a log of how you use your phone and pre-opens the apps you need. If you constantly kill and clear out apps, you're breaking that log. So when clearing apps, you're not letting Android learn the way you use it. This results in a slower experience, and more battery drain.
Click to expand...
Click to collapse
Deactivate Auto-Rotate LINK
Auto Rotation isn't always needed... right?
Disable Auto Rotation
Go to Settings, Display, Rotation, and turn off Auto-rotate.
Explanation
Auto-rotate uses the phone's G-Sensor to see how you're holding the phone. By turning off Auto Rotation, you're using less hardware, thus using less battery
Click to expand...
Click to collapse
Turn on Airplane Mode LINK
When in low signal places, it's a hassle trying to find that precious signal...
Turn on Airplane Mode
Whenever you feel that the mobile signal is getting too low, turn on airplane mode if you don't need to call someone. Go to settings, More, and check Airplane mode to turn it on.
Explanation
The phone wants you to stay connected to a cell tower whenever possible. On low signal places, the phone will try harder to find a tower to connect to, and that drain a lot of battery. So turning on Airplane Mode makes your phone rest and not search for any tower, thus saving battery.
Click to expand...
Click to collapse
Use a Light Theme for LCD Screens LINK
AMOLED will consume less battery on the dark theme, LCD isn't affected by that...
Use a Light Theme for LCD
Using a lighter theme with more white in it helps your eyes, because you can lower the brightness even more and still see the screen just fine.
Explanation
The lower the brightness, the better the battery life. So a lighter theme is what we want, so we can reduce the brightness and still see everything.
Click to expand...
Click to collapse
Charge You Battery Correctly LINK
It's called a battery cycle, not a quarter of it
Charge it correctly
Don't let your battery go down to 0%, charge it while it's about 50%.
Explanation
No matter what charger you're using (either a slow or a fast one), the battery is greatly affected by the frequency of the charges. Our phones have different batteries than past devices had, so battery life cycles are a bit different as we used to think.
More info here: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Click to expand...
Click to collapse
Use Widgets with Manual Refresh LINK
Widgets update themselves a lot... but there's a solution for that.
Use Manual Refreshed Widgets
Check every widget you have, and see whether you can set it to refresh whenever you click on it, or do something to refresh it.
Explanation
Auto-refreshing widgets make the phone wake up a lot and do some processing which can use the battery. By making them manual, you are controlling the frequency of the refreshes, and you are forbidding the widgets to refresh while the phone is asleep.
Click to expand...
Click to collapse
Do Not Rely On Battery Discharge Rate LINK
Look! Left it overnight and only lost 2%! This is about 0.25%/hr!
WRONG!
The battery acts like a capacitor (not exactly like it, but very similar to it), so whenever its charge is changed, the discharge / charge rate will change with it.
So, if you leave your phone overnight at 100%, you'll get a rate of x%/hr. If you leave it at 50%, you'll get a rate of y%/hr where x and y are very different.
It's only a matter of experimenting where is the sweet spot of battery percentage that you should have when keeping it overnight.
Click to expand...
Click to collapse
Do Not Wipe Battery Stats LINK
Some people do that a lot... but why?
What's Battery Stats?
Battery stats is basically a file in Android that stores the battery history. The longer the battery stats is, the more accurate the battery percentage reading is.
Why not wipe it?
Wiping battery stats is like tinkering with the fuel gauge in your car: you won't get more gas if you glue the gauge's needle at Full.
The problem is that wiping battery stats will give you wrong readings. Users thought that wiping it will make the battery "hold the charge better". This is wrong because doing so will break Android's battery reading, and that's why it will show you a higher percentage for a longer time.
Click to expand...
Click to collapse
Do Not Buy Cheap Batteries LINK
Wow! A 2500 mAh battery for my Galaxy Ace! And the same size of the original!
The problem here is that some users order a battery with a higher mAh value for a very low price. They get their 2500 mAh battery and put it in the phone. The device would last a lot longer now before its battery dies.
Now let's not forget why they ordered such a battery. It's most probably because their old battery is just exhausted and isn't lasting much. So no matter what battery they get, they'll notice a big difference in battery life.
Usually these cheap batteries are advertised as 2500 mAh, while they're actually a lot less.
So if you want to replace your old battery, try getting an original one.
Click to expand...
Click to collapse
Thanks to all of you who gave me more ideas on how to achieve better battery life
Medium
Undervolt LINK
The CPU is the biggest battery consumer, and it needs voltage from the battery. If we decrease that, we'll gain some battery life.
Undervolt your CPU
Assuming you have TricksterMOD, launch it and go to the specific window. Scroll down to CPU Voltages, then click Profile, and save the Profile as Default.
Now hit the minus/plus button right above where it now says "Default". When the window pops up, hit the minus button JUST ONCE. Every time you hit the minus button you undervolt by 12500 mV, and we'll call that a "step"; so undervolt by one step.
Hit the check mark button to apply.
Explanation
Every time you undervolt by a step, the CPU will demand less and less from the battery to run. This improves the battery by just a bit. It's mainly to avoid temperature throttling, but it also improves battery.
Click to expand...
Click to collapse
Increasing SD card Read-Ahead Value LINK
Whether or not you have an SD card, this helps...
Increase readahead Value
Go to TricksterMOD, swipe to general, and click Read Ahead Buffer Size under the I/O Control section. Set it to 3072 (Value is in KB, so it's 3MB)
Explanation
The bigger the read-ahead buffer is, the better the SDcard can predict what command would come next. It prepares itself to do a command before it's even issued. This gives you better performance, and a potential increase of battery life because generating 3MB is nothing compared to the performance benefit.
Check out this Spreadsheet from broodplank.net for more info on the benefits of read-ahead.
Click to expand...
Click to collapse
Advanced
Underclocking LINK
One major battery drainer is the CPU, so if you don't really use the phone much, and you don't care about games, you should probably consider underclocking it to get that precious juice back.
Requirements
You must be rooted and have a kernel that supports overclocking. You may find out how to root by doing a little online research because every device has its own rooting method (for example, I wrote a fully detailed guide on how to root your Nexus 4).
CPU Underclocking
Warning: Underclocking the CPU too much could result in an SOD (Sleep Of Death) which makes the phone sleep and not turn on without pulling the battery.
First of all, we need a controller, or a daemon to control the CPU's clock speeds. So go ahead and download TricksterMOD from the Play store, we'll be using that to underclock the CPU.
Now enter it and grant su permissions, swipe from left to right and select the general menu, scroll down to CPU frequency control and tick frequency lock, then click on the number next to the min button, and choose the smallest number in the list.
Then, click on the number next to the max button and choose something a little less than you CPU's stock frequency... on a Nexus 4, the stock frequency is 1.5 GHz (or 1512000) so I picked 1.2 GHz (or 1242000).
Now swipe down to CPU Governor Control and click the button next to the Governor Button, and select conservative. If you don't have conservative in the list, pick ondemand. Now hit the check mark button at the top of the app to apply the settings.
Explanation
We are lowering the CPU's clock speed which makes it a little slower, but consumes much less battery. We are also changing the way the frequencies are handled: with the conservative governor, the CPU will prefer staying at lower frequencies.
MP Decision
We're not done yet, swipe again from left to right and click specific, then look for MP Decision. If it's there, turn it off, if not then it's probably already off. Hit the check mark to apply the settings.
Explanation
MP Decision sees how you use the phone, and clocks the CPU relatively (if you're just chatting, it'll underclock. If you're playing games, it'll clock it to normal). We don't want that since we want to force underclock the CPU, so we turn this off to prevent it from playing with our settings.
GPU Underclocking
On that same screen, scroll down to GPU max frequency, and lower that just one step below the default clockspeed (400 MHz being the stock frequency on the Nexus 4, so let's set that to 320 MHz). Don't forget to hit the check mark button to apply the changes you've made.
Explanation
The GPU draws almost everything you see on the screen, so it's always active. Lowering its frequency has a big positive impact on battery life, which is what we want.
So that's basically it for the underclocking part, have fun playing with different governors and frequencies to get that precious Performance/Battery life point.
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Click to collapse
Detecting Wakelocks VS Installing Battery Saving Apps LINK
The most cliche thing to do when your battery doesn't last a day is install a battery saver app. However, I don't do it myself. I prefer detecting wakelocks in order to reduce battery consumption.
What is a Wakelock?
A wakelock is the moment where you turn the screen off, but the CPU stays awake doing something. It is the phenomenon when the CPU isn't asleep when the screen is off and it shouldn't be doing anything. Wakelocks usually drain battery because the CPU is kept awake and working while it should be resting.
Detecting a Wakelock
To detect a wakelock, install Wakelock Detector. Charge your phone, then unplug it and leave it with the screen turned off for about an hour or two. Then open the app and check the list of wakelocks.
The bigger the red bar on the top, the longer the wakelocks are. The top app is the number 1 culprit, and should be removed. If the top app is Google Services, it's probably the Location issue. If it's another app, check if there are syncing issues, and try making the sync interval a little longer, or turn off its notifications.
Explanation
We're trying to minimize the wakelocks caused by some apps to prevent the phone from being awakened. By doing that, we let the phone go to deep sleep faster, and longer. So, more battery life for us!
Another way to detect wakelocks (a little more pro)
Download and install betterbatterystats. It's basically a more pro version of Wakelock Detector. It also needs root for some functionality to work, but it gives you a more in-depth info about the wakelocks, CPU states, and network usage.
msm_hsic_host is the 3G... not to worry about that
So that's it for the wakelocks! Keep testing with different app configurations to achieve the best deep sleep mode for your phone, and get the most out of your battery.
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Undervolt Even More! LINK
Undervolting once is fine. Undervolting twice is better. But undervolting a million times isn't good... So let's undervolt as much as we can.
Download Stability Test, run it, and hit the Scaling Stability Test button (root will be needed). Wait about 8 to 10 minutes while it's doing the process. If it doesn't crash, stop it by pressing the back button. Your phone is stable, you can undervolt even more.
So go to TricksterMOD and undervolt another step (remember to save a profile indicating how many steps you've undervolted). Then test again using stability test....
Keep doing that until something bad happens like the app crashing, or Android itself rebooting. When it does crash, "overvolt" back one step. At this point your CPU is running good while on the lowest voltage.
Explanation
Every time we undervolt by a step, we test the stability of the CPU so it doesn't crash. When it crashes, we overvolt back to the last voltage set that was stable, so that we get the lowest voltages our CPU can handle without going crazy, and thus, getting that slight push of the battery life.
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Tweak Kernel Governors / Schedulers / KSM LINK
These tweaks only apply to certain kernels, since not all kernels allow you to modify these settings.
Governor, Schedulers, and KSM Tweaks
If you have a kernel tweaking app like tricksterMOD or faux clock, you are 90% free of all trouble of tweaking kernel governors.
First, find a kernel that has a specific and optimized governor. Turn off MPDecision if the kernel has an alternative (anything like "Intelli-Plug" will do). Now let's tweak!
We cannot cover the options for every kernel and every governor in the universe since each one has its own options and settings.
I am currently using faux kernel on my device. This kernel has intellidemand as the optimized governor. The aim of the kernel dev was to replace MPDecision with something better.
The links below provide some info about that kernel. These settings include tweaking the governor, schedulers and the KSM:
http://forum.xda-developers.com/nex...ernel-ver-031-mako-kk-4-4-uv-otg-cpu-t2008222 (the second post shows the recommended settings for faux kernel)
https://plus.google.com/+PaulReioux/posts/WFcjPqMEZgJ
Have fun tweaking!
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Great guide, and great usage of your 2000th post! I've featured this on the XDA Portal
Great post!
I like using Screebl to prevent screen turning off and on unnecessarily. And use One Power Guard by onexuan. It really lessens the drain over night. I use Condi to automatically disable mobile data when connected to wifi at home as well.
very great guide! Just note something for people with HTC Sense. If you use the weather clock with current sensor, setting the location to GPS only will disable the location service (even if it's seems on, the widget will say it's off since it doesn't want to use the GPS). Because of that, you loose that feature if you do that.
Um, there's a problem with this guide. Instead of underclocking, overclock the processor. The faster the processor, the faster it gets jobs done, the faster it can go to sleep. These reduces long wakelocks and in general improves battery life.
I used to think the same way, but thinking that way is false.
What about Greenify?
idk about you, but greenify is useful.
EDIT: And for the fast charge/slow charge, do you have any proof?
Beatsleigher said:
Um, there's a problem with this guide. Instead of underclocking, overclock the processor. The faster the processor, the faster it gets jobs done, the faster it can go to sleep. These reduces long wakelocks and in general battery life.
I used to think the same way, but thinking that way is false.
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So you're saying that it's better not to underclock and just use default values?
Hmm kind of skeptical about the home button thing. I usually back out of an app to prevent it from running in the background and consuming battery. Can anyone comment on this?
fredrick1213 said:
Hmm kind of skeptical about the home button thing. I usually back out of an app to prevent it from running in the background and consuming battery. Can anyone comment on this?
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the fact that the app opens from scratch again makes the CPU work more and thus using more battery
if it's kept in the RAM, it'll stay paused, it won't use the CPU and makes your phone faster sincr it resumes the app, thus making your battery usage less.
Sent from my Nexus 4
Riro Zizo said:
the fact that the app opens from scratch again makes the CPU work more and thus using more battery
if it's kept in the RAM, it'll stay paused, it won't use the CPU and makes your phone faster sincr it resumes the app, thus making your battery usage less.
Sent from my Nexus 4
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So if using Greenify, which automatically hibernates apps and greatly increases my battery life btw, will it make pressing the home button useless?
Beatsleigher said:
Um, there's a problem with this guide. Instead of underclocking, overclock the processor. The faster the processor, the faster it gets jobs done, the faster it can go to sleep. These reduces long wakelocks and in general improves battery life.
I used to think the same way, but thinking that way is false.
Click to expand...
Click to collapse
you have a point if the user is a heavy user. But for normal users, the CPU won't be doing much; so underclocking it won't affect time, but it greatly improves battery life.
steakhutzeee said:
What about Greenify?
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pham818 said:
idk about you, but greenify is useful.
EDIT: And for the fast charge/slow charge, do you have any proof?
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greenify freezes the app if you're not using it, so the phone will start it from scratch... it's a good app if you use it on apps that you barely use, but don't greenify the apps that you use frequently, it will badly affect your battery life.
as for the fast/slow charge, I have no proof since this is what i usually have as a personal experience, but i find out that my battery lasts longer when i charge it slower...
Sent from my Nexus 4
fredrick1213 said:
So if using Greenify, which automatically hibernates apps and greatly increases my battery life btw, will it make pressing the home button useless?
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if for example you greenify whatsapp, and you press home while you were inside whatsapp... yes... it's useless...
but try building the habit of pressing it, the back button kills the apps, we don't want that
Sent from my Nexus 4
i always clear all my apps before i put the phone to sleep.
i'll try to not clear apps anymore, and see how that works.
thanks
pham818 said:
i always clear all my apps before i put the phone to sleep.
i'll try to not clear apps anymore, and see how that works.
thanks
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ah, you see, here's where it does make the good difference, keep doing that because you won't use the apps for about 8 hours, so it's better if they're closed.
i just posted this because i see people constantly closong the apps that they always use, but if you're not using the apps much (like when sleeping) it's better to kill them
Sent from my Nexus 4
Great post, love all of the tips. Keep up the good work. I hope to see 2000 more posts to come.
aguilar8788 said:
Great post, love all of the tips. Keep up the good work. I hope to see 2000 more posts to come.
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oh you will, trust me
every 1k posts I'll make something very special.
my 1000th post was releasing 2 very annoying apps that the portal newswriters denied them for being too annoying
Sent from my Nexus 4
First of all thanks! battery life is a never ending issue in any smartphone using the no animations, less widgets and device only location... hope it'll prove useful
I got a question... I use go power master which has a "screen off optimization" and i noticed that my battery barely drains itself while the phone is idle... it's not what you count as a task killer right?
[Q&A] Teclast x98 air The still ongoing problems (and an ongoing hardware investiga
Q&A for Teclast x98 air The still ongoing problems (and an ongoing hardware investigation)
Some developers prefer that questions remain separate from their main development thread to help keep things organized. Placing your question within this thread will increase its chances of being answered by a member of the community or by the developer.
Before posting, please use the forum search and read through the discussion thread for Teclast x98 air The still ongoing problems (and an ongoing hardware investigation). If you can't find an answer, post it here, being sure to give as much information as possible (firmware version, steps to reproduce, logcat if available) so that you can get help.
Thanks for understanding and for helping to keep XDA neat and tidy!
thanks, can't belive there is no solution
Sorry to bother you, but after a week looking for a solution to the battery drain in windows I've just found +-10 people like me. It's a nice tablet but useless with this issue.
Please ¿Have you find a solution, how?
Thanks in advance!
motoi_bogdan said:
So... like most of you, i have at least one problem with my teclast x98 air tablet, version C9J8, running only windows (8.1 pro/10 preview).
At this time i've constantly encountered the following problems:
- not turning on after being shut down. Pressing the power button doesn't do nothing. Sometimes it does this while charging, at the end of the charge, othertimes it... simply won't power on.
- huge battery drain in stand by. I've flashed ALL (yes... all) dual boot/single boot air/air 2 BIOS files i could get, in all versions. If it's got a .bin extension... yes, i've flashed that too. No change AT ALL!
- huge batterty drain... when powered off !?!?! Yes, that's the next level of awsomeness. You know your tablet is special when it sometimes discharges faster when turned off compared with it turned on. (@XDA, guys .. can you please add some facepalm smiley/emoji.. i wanted to use it about 30 times since i got this tablet)
- sudden shutdowns. Like when you use your tablet it simply dies in your hands with no apparent reason.
- battery meter stuck at 7% and only 1 cell reported. NOT fixed by the methods already known (flashing BIOS and letting it discharge then recharge with tablet turned off).
So.. i'm pissed off. I've disassembled the damn thing in search for some answers. I'll by posting some photos with the guts of this thing (c9j8 version).
First of all, I wanted to check the power draw directly from the battery, so i've desoldered the positive wire from the battery and inserted an amps meter to check the current flow.
For example, the stock charger will supply around 1.5-1.9 amps to the battery when charging (tablet off). For comparison a small 5V 1A, samsung charger supplied 1.1 amps in the same setup. Some other interesting facts, when on and booted to windows - the tablet draws about 1.1-2.2 amps (mostly depending on screen brigtness and cpu load). That's a total of 4-11 watts. If you lower the brigtness from full to low (bottom third of the slider) you effectively half the power consumption. As usual the display consumes more then 50% of the total power being drawn. Those who complain about huge power drain on standby will be surprised to know that the tablet draws 0.3-0.8 amps (it fluctuates) in standby. That’s HUGE. It should be 0.03-0.05 amps at MAXIMUM. 0.3 amps multiplied to a 3.8volts cell is 1.14Watts draw per hour at minimum in my case.
Leaving that aside, let's return to the above problems. The battery is connected to the motherboard by using a 3 wire connection (positive, ground and data bus/i2c or similar). The motherboard itself doesn't feature ANY protection/power management chip aside from a single ROHM controller located under a metal shield. Even if some data is passed between the battery and motherboard, you can simply decouple the battery and power the tablet with regular 18650 lithium cells or 3 AA alkaline batteries in series. The tablet is stupid enough not to notice any difference.
Let's go more deep in the start-up sequence.
When you press the power button, a half a second 500mA ramping to 800mA load is registered. The power management chip measures the voltage drop under that load and if it deems it to be "acceptable" it passes power to the rest of the motherboard. BIOS/firmware takes over from there but does a measurement of its own. If it results in an "ok" the boot sequence can the follow. If not, the BIOS would then power off the tablet. Here lies the first problem. The power management chip and BIOS thresholds for a "low voltage" battery are different. Very different. The chip itself considers the battery voltage to be ok if it's above about 3.45-3.5 volts and not dropping lower then 3.3v under a 500-800mA load. The BIOS/firmware (or whatever software part does this) won't accept a measurement below 3.65v. volts. So, when you pass the BIOS stage and boot to windows, the data you get when checking your battery comes from the power management chip. If you fully discharge the battery in windows (down to 2-3% or similar) and you are able to shutdown the tablet by yourself (it doesn’t cut power by itself) you could find that it cannot power back again because even if the power management ic gives the go ahead, the bios/firmware side refuses to go any further. The battery must be charged for some time before the bios will allow for booting.
The problem is that both power management IC and BIOS readings should be taken in same way and be of similar value. They are not. It’s not that Teclast couldn’t do this, but for whatever reason they decided to write the BIOS in that way. The 7% problem could originate in the fact that a what the BIOS considers a dead battery (0%) is actually charged to a degree and is different from 0% measured at the power management chip level. Overall the power readings are inconsistent in both measurement and reporting. It doesn’t seem to be a hardware problem.
Another problem is how „dumb” is the battery management hardware. In any modern portable computer (laptops, tablets, even phones – excluding some chinese products) you cannot simply disconect the data bus from the battery and simply feed some random 3-4 volts to power the thing. It’s like you would remove the battery from your laptop, check the label on it for the voltage rating and stick a bunch of wires on the contacts (2 of them) and expect the thing to boot. It won’t. Firstly because IT’S NOT SAFE. The battery or motherboard can’t report one to another if a fault is occuring and can’t accurately measure voltage/current consumption.
Yet another problem is that the same power circuitry does not compensate for large voltage/current swings. A simple experiment for you folks to try. Get a aa battery (a battery in general) measure it’s voltage as it’s sitting still then connect a small lightbulb/motor/led/whatever load runs on that battery and measure the voltage WHILE the battery suplies current to the load. You will find a voltage drop at the battery level. It’s normal, is how these things run. A complex electronic device must take that into account in it’s design. At idle/browsing web/viewing picture, the tablet draws about 1.1 amps from a battery that’s registering 3.87volts (at that test’s time in my case). Running a benchmark/video game produced a series of spikes to 2 – 2.1 amps and an aditional voltage drop to around 3.61 volts. Remember that some power rails require exact voltages (cpu core, main bus, 5volt usb bus etc). The power circuitry must provide those exact voltages regarding the input voltage swing. Noup... and that’s the main problem untill now. THEY DONT! I was shocked to see how the chinese engineers are pushing it right on the edge. If you desolder one battery pin and insert an ampere meter in series, that’s enough to induce the little voltage drop needed for the tablet to freeze under load or shut down alltogether. The ampere meter leads were rated to withstand 10 amps under load – and they do, yet the simple fact you inserted a piece of wire along the track is enough to disturb an already delicate balance. The thing is only barely capable of whitstanding it’s own battery voltage swing. In my opinion you can try to reduce the load by disabling turbo modes on cpu/gpu or whatever (and teclast tried with some bios/models of the x98 air) but you cannot fix this by firmware. It’s just bad hardware design. They cut costs on the power management side.
Those are my finds untill now. I’m thinking of adding some capacitance over the power rails to take the load over from the batteries when a large amount of current is drawn (spikes that occur under load). Other then that, there is not much to do about this.
Even so, i don’t know why the tablet still draws power while turned off. I wasn’t able to make it do that while measuring. Aditionally i don’t know why only one cell is reported in windows. More tests are required.
This is still an ongoing "project". Some of my conclusion could be wrong at this stage. Like i've said it's still a work in progress. It would be quite a thing if anyone with some knoledge about the BIOS code (or how it runs on this tablet) could step in and direct me to the right hardware to examine.
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Anom7832 said:
Sorry to bother you, but after a week looking for a solution to the battery drain in windows I've just found +-10 people like me. It's a nice tablet but useless with this issue.
Please ¿Have you find a solution, how?
Thanks in advance!
Click to expand...
Click to collapse
i don't think a simple bios flash will fix that in our cases. Could be that some tablets have defective power management ic's. in fact all bios versions tried by me lead to a similar voltage drop across the battery in stand by. I'm now tracking where is all this power going to since something has to use it. At this time i can rule out the camera and the touchscreen controller since i've disconnected them from the mainboard with no noticeable effect. Since the power drop seem related to the cpu area i suspect the cpu itself not being able to go to a lower power state but i must access the core voltage pins to check this. Yet normally this should be corectable by a bios update but for whatever reason teclast isn't providing any.
Still...more testing is needed
Top-notch Android smartphones like the Samsung Galaxy S5 and HTC One (M8) are powerful, but unfortunately, they don't have endless battery life. In fact, many Android phone users would be happy to make it through a single day, hoping that a nightly recharge is sufficient.
Sadly, it sometimes isn't. A number of factors have conspired to reduce gadget endurance over the past several years. Thinner designs with less room for batteries, larger and brighter screens, faster quad-core processors, more software that runs in the background, and power-hungry GPS radios all share responsibility. The move from 3G to 4G networks a few years ago—particularly of the LTE variety—has also taken its toll.
But there's much more to poor battery life results than that. Fortunately, there's plenty you can do to stem the flow of juice from your Android device. To write this article, I used a Google Nexus 5$114.94 at Amazon, as it's running the latest version of Android 4.4 KitKat with no extra interface enhancements, but these tips should apply across just about any Android phone. Try these tips to extend your handset's battery life:
1. See what's sucking the most juice. Navigate to Settings > Battery to see an organized breakdown of what's consuming your phone's battery. Applications and features will display in a descending list of battery hogs. If you see an application you barely use or a feature you never use, you'll want to uninstall the app or turn off the feature.
Android Battery Tips
2. Reduce email, Twitter, and Facebook polling. Set your various messaging apps to "manual" for the polling or refresh frequency, just as a test, and you'll instantly extend your device's battery life by a significant amount. Once you see what a difference that makes, try re-enabling just the most important ones, and possibly reducing their polling frequency in the process.
3. Turn unnecessary hardware radios off. It's great that today's phones have LTE, NFC, GPS, Wi-Fi, and Bluetooth, but do you really need all five activated 24 hours per day? Android keeps location-based apps resident in the background, and the constant drain on your battery will become noticeable, fast. If your phone has a power control widget, you can use it to quickly turn on/off GPS (the largest power drain), NFC, Wi-Fi, Bluetooth, and LTE. On stock Android, swipe down to bring up the Notification bar, and then tap the icon on the top right corner.
Android Battery Tips
4. Use the extra power saving mode if you have it. The aforementioned Galaxy S5 and HTC One (M8) both have Ultra Power Saving and Extreme Power Saving modes, respectively, that limits the phone to texting, phone calls, Web browsing, and Facebook. This can squeeze extra hours or even a day of standby time out of just a few remaining percentage points of battery.
5. Trim apps running in the background. From Settings > Apps, swipe to the left; you'll see a list of apps that are currently running. Tap on each one to see what they're for; you can stop any apps that you don't need running in the background all of the time.
Android Battery Tips
6. Dump unnecessary home screen widgets and live wallpaper. Just because they're sitting on the home screen, seemingly inactive, doesn't mean they're not consuming power. This goes for widgets that poll status updates in the background, as well as ones that just sit there but look pretty and animated—not to mention animated live wallpaper. (But don't dump everything, as part of what makes Android great are the home screen customizations; just remove the ones you don't use.)
7. Turn down the brightness and turn off Automatic Brightness. It's probably obvious at this point, but you'll be surprised by how much this one alone helps to improve battery life.
8. Update your apps. Applications often get updated to use less battery power, so you should make sure your apps are up to date. Even if you configured the phone for automatic updates, some apps still require that you manually install updates. Check for app updates in Google Play by hitting the menu key and going to My Apps.
9. Keep an eye on signal strength. If you're in an area with poor cellular coverage, the phone will work harder to latch onto a strong-enough signal. This has an adverse effect on battery life. There's not much you can do about this one, but keep in mind that this could be the culprit behind a seemingly weak battery; it's worth popping the phone into Airplane mode if you don't need data or voice calls.
10. Check the reviews. We conduct battery life tests on every single Android phone we review. Unsurprisingly, the results vary widely between handsets, even on the same network. When choosing a phone, make sure that real world talk time is sufficient. You can't go by what the manufacturer says; we see variances on the order of several hours of usage in both directions on a regular basis.
11. Buy a battery case or larger extended battery. Battery cases combine a hardware enclosure, which protects your phone, with an extended battery that can double your phone's endurance. You can find models compatible with popular Android phones from a variety of manufacturers, such as the Mophie Juice Pack and Incipio Offgrid Battery Backup Case (both for the Samsung Galaxy S4).