One of the worst things you can do to a lithium battery is discharge it completely. They don't suffer from "memory" yet every time someone here in the forums complains that they are getting crappy battery life the instruction to discharge and recharge to 100% before clearing stats pops up.
For those who are interested here is an article that explains in detail.
batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
My main question- Is there some function in android that looks at the maximum depth of discharge level of the battery or is it that most people don't understand the characteristics of L-ion and confuse them with those of Ni-Mh or Ni-Cad?
I want to know because if I need to completely discharge to get better perfomance, despite the reduction in charge cycle lifetime, I will do it but only infrequently.
I've only let my battery discharge completely once, and it wasn't on purpose. From the posts I see here I think I get above average battery life. About 18 hours miui before I go for the charger and on 2.2 roms I'd get 20 hours and still have 40% or so to go. So no I don't think completely discharging your battery does anything for battery life.
Sent from my T959 using XDA App
I have never run mine down completely. Gotten it to about 6% but that was because I was fighting ROM flashing problems. I usually call 25-30% enough for me and plug in then. I am also getting 30 hours out of my 2.2 with a good deal of use. I used to have a Motorola and their batteries are total crap. If you EVER let it get down below 10%, it took some real work for it to charge correctly and boot up. Even as much as a hardware mod where I have had to cut the wires on a USB charge cord and charge it rigged up with the wires pressed against the battery and prongs in the phone. Very dangerous, but worked for a last resort.
Discharging the battery is not for the sake of the battery,but more so for the ROMs data and how it acquires the battstats usage. I only run it up and down and clear stats when flashing a new ROM, but I do use my phone moderate to heavy daily and have had great success in battery life the way I calibrate it.
The solution I think is to use a larger capacity battery and regulate it to narrower window of operation never fully charging or discharging.
The fastest killer though seems to be heat.
I have read several times that your phone does not fully discharge the battery...that there is still a minimal amount of charge,not enough for the phone to opperate but enough to not damage the battery when it shuts down
Maybe the batterystats file can be saved after being calibrated once and then restored after every wipe oor flash.. that would save some time aabd according to you guys, batt life too
Sent from a cell tower to the XDA server to you.
I've only ever calibrated my a few times and only after flashing a new rom. I never run my battery down after resetting the stats. I just use my phone as I normally do. My understanding of calibration is that it's not about squeezing more life out of the battery despite what most people think but of getting a more accurate measurement of the battery's actual charge. Also while it's true that the phone will shut of before the battery is completely discharged damaging the battery, allowing the battery charge to drop that low shortens your battery's life and decreases the amount of charge your battery can hold.
What gets me is I also read somewhere that for optimum battery life you should keep your battery level somewhere between 70%-40%. Of course that doesn't stop me from charging my phone to 100% everyday. I don't remember where I found that article but I'll post a link if I can find it again.
The reason this bad advice about completely discharging your battery persists is probably the same reason people keep recommending automatic task killers.
batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
ok, ok ill volunter, ill watch porn till my battery"discharges" At least my log will be interesting
radiohd said:
One of the worst things you can do to a lithium battery is discharge it completely. They don't suffer from "memory" yet every time someone here in the forums complains that they are getting crappy battery life the instruction to discharge and recharge to 100% before clearing stats pops up.
For those who are interested here is an article that explains in detail.
batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
My main question- Is there some function in android that looks at the maximum depth of discharge level of the battery or is it that most people don't understand the characteristics of L-ion and confuse them with those of Ni-Mh or Ni-Cad?
I want to know because if I need to completely discharge to get better perfomance, despite the reduction in charge cycle lifetime, I will do it but only infrequently.
Click to expand...
Click to collapse
Discharging the Battery & Running the Battery Dead is 2 Different things!
We recommend running the battery dead ( Phone Shuts Off ) & recharging while off to train the Android OS from Full > Empty..
Running the Phone until Dead is not Going to hurt the Battery in anyways shape or form despite what you may think or read!
The Reason is, the battery is never fully Discharge & still holds Voltage.. The Calculations of Charged / Dead is at the Kernel Level, so even when dead it still has a 3.4v still or roughly..
As long as the kernel isn't tampered with, discharging the battery via the Phone will never hurt the battery period!
Now, Based on the link you posted you would have to run the battery down past the safe discharge point.. Via some other means of killing the battery, other than using the Phone.
To help ease your mind, Remember this:
~ Charge levels is controlled by the kernel
~ Even when Phone powers off, there is still plenty of charge in the Phone's Battery
~ Battery is never Fully charged, as this also hurts lithium batteries
Roughly every Android kernel does not let lithium battery get below 3.4v and at most 96% charged.
Hope this helps,
~Eugene
If you are still concerned wait until your phone turns off and stick your battery on a meter. You will see there is still power left in it...
My original battery that came with the phone got great life, then couple of months later it was discharging in like 2-4 hrs(froyo), so I called, they sent another one free...5-6 months later that one started doing it as well, so I pulled out the old one from the drawer, it powered on at like 85% ! and I was getting crazy ass life out of it on miui over 30 hrs one time...now that one is acting up again, so I'm going to try to swap again..lol...maybe there's something to not using them for a while...
I've used diff roms and combinations of draining/recharging...calibrating, not calibrating...it's always different results..honestly I don't think there's any rhyme or reason to it other than the fact that many vibrants have diff hardware and there will always be some weird quirk on a per user basis...
As far as hurting it by draining it all the way, I hardly think that's the case seeing as with both batteries I've always let it run down...not on purpose but there has been many many times I've plugged in at 1% or had to power back on because it died...charged it up and got 20-30hrs no prob..usually issues come up when flashing a new rom...
i think it all comes down to luck of the draw. ive had my vibrant since launch day, and i still manage great battery life. my battery is actually stamped 7-02-2010. every 2 weeks or so ill drain the battery completely, turn it back on and allow itself to die again, and finally allow it to fully charge overnight or 4 hours. i usually get a good 7-8 hours of constant use on cm7, or over 24hours if let on standby.
im still debating if i want to grab an epic 4g touch battery as well to increase it even more.
qpinto said:
im still debating if i want to grab an epic 4g touch battery as well to increase it even more.
Click to expand...
Click to collapse
what's this about?
Epic 4g batteries are 1800 and fit in our vibes.
Dr.Stainedglove said:
what's this about?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1262035
in there they tested in a store since the epic 4g touch battery fit into a regular epic 4g, if it would fit into a vibrant. only thing is you have to put the battery in facing inside, and it fits and works 100%
Yeah the Epic 4G batteries fit in our Vibrant's. You can buy knock-off one's (that work well) for 19.99$ US! Here's a thread about it...
http://forum.xda-developers.com/showthread.php?t=1316492
Epic touch battery for the win. I've been rocking it for a few weeks. I was on miui and getting 14-16hrs. I recently went back to froyo and yesterday I got 12hrs off of a 67% charge.
Sent from my SGH-T959 using xda premium
dont know if people have seen this article but i thought it was pretty interesting about the battery stats file not actually needing to be deleted...
http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
jonen said:
dont know if people have seen this article but i thought it was pretty interesting about the battery stats file not actually needing to be deleted...
http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
Click to expand...
Click to collapse
Lol one of the biggest flukes in our forum haha.. people will harm their battery to calibrate it and it doesn't even do anything ...
Thank god I only calibrated once
sent from the xda app on my android smartphone.
Related
yesterday after flashing nero 5 i wanted to recondition, so while sleeping at night i charged my phone to 100, and now during the day time im trying to waste the battery, but during that i got caught up on adb and connected my charger, and left it there, now its back at 83% battery, does this mess up the reconditioning process? or do i have charge back to 100, then do it all over?
anyone? please lol
xriderx66 said:
anyone? please lol
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Click to collapse
what you should do is drain it all the way untill you cant turn it on anymore and leave it chargin all night turned off, and when you wake up turn it on and let it charge untill its full again, then boot into recovery and wipe batt statt , and you should be good to go mine last about 20 hours after i did that
T.C.P said:
what you should do is drain it all the way untill you cant turn it on anymore and leave it chargin all night turned off, and when you wake up turn it on and let it charge untill its full again, then boot into recovery and wipe batt statt , and you should be good to go mine last about 20 hours after i did that
Click to expand...
Click to collapse
I did just about the same with mine, minus the chargin all night turned off, and I am getting about 20-24 hours with mine, which is more than I need as I plug it in every night
cjggilbert said:
I did just about the same with mine, minus the chargin all night turned off, and I am getting about 20-24 hours with mine, which is more than I need as I plug it in every night
Click to expand...
Click to collapse
me to im near a power source or computer all the time so
What you should do is keep letting it drain until 1% or so. I don't think you need to let it die completely. Charge to 100%. Boot into recovery and clear battery stats with the charger still plugged in. This is the important part. Then drain the battery and charge to full. Then you should be good to go.
question, after draining to about 1%, does the phone have to be off? and can i use the phone just a bit while its charging?
xriderx66 said:
question, after draining to about 1%, does the phone have to be off? and can i use the phone just a bit while its charging?
Click to expand...
Click to collapse
The general consensus is that when you condition you should charge the phone while it's off. I don't know enough about battery chemistry to tell you why. Just do it to be safe
Battery "recondition", actually does not "recondition" the battery, it is a trick just to get more accuarte readings (that's the only reason you reset STATS)
The battery may not charge up to 100% and will never do, just following this procedure. It will just say it is @ 100% when you actually are @ 85 or 87, that's why the sudden "jump" you see.
Best way to try to get better readings is charging the battery till it says 100%, unplug it and plug it again a couple of times until it fully charges and follow the same procedure.
Once yo did this a few times, turn off phone, reboot in CWM (with the phone never unpluged) and clear battery stats. turn off phone and unplug,,,,
You will got at least more accurate readings
gagb1967 said:
Battery "recondition", actually does not "recondition" the battery, it is a trick just to get more accuarte readings (that's the only reason you reset STATS)
The battery may not charge up to 100% and will never do, just following this procedure. It will just say it is @ 100% when you actually are @ 85 or 87, that's why the sudden "jump" you see.
Best way to try to get better readings is charging the battery till it says 100%, unplug it and plug it again a couple of times until it fully charges and follow the same procedure.
Once yo did this a few times, turn off phone, reboot in CWM (with the phone never unpluged) and clear battery stats. turn off phone and unplug,,,,
You will got at least more accurate readings
Click to expand...
Click to collapse
Android Police did a piece on plugging and unplugging your phone to get up to 100% (it's called bump charging, see below). They recommended that you NOT do it because it doesn't get you much additional juice and you wear your battery out faster. Normally I just charge my battery up to 100% (no drain), wipe the battery stats, unplug and go until it dies. I use it while it's plugged in and still get a full day easily out of my phone.
http://www.androidpolice.com/2010/1...bump-charging-and-inconsistent-battery-drain/
I hate to be the bearer of bad news. You can not condition a Lithium-Ion battery. All you are doing is wearing it out prematurely by deep cycling. Every time you do this you destroy your over all battery life a little.
I have posted about this here in several thread, and I am getting a little tired of having to tell people NOT to do this because they don't search for themselves. Do a search on the forums for deep cycle li-ion and see for yourself.
If you want to know the technical reasons why, Google is your friend.
so we just deal with what is perceived as faster battery depletion?
Im asking because As i have posted on another threat I am a complete freak about my battery life.
Basically yes, I have 3 batteries to go around all day, although I us the car charger, if for any reason one day I take the train to the city, I will eat up 2 and a half batteries in a day.......
I had 3 batterys for my hd2 I need to get 2 new batteries for my vibrant. I guess im just tripping because I tried and over clock kernal and it seems like its dying faster while the screen is off
T313C0mun1s7 said:
I hate to be the bearer of bad news. You can not condition a Lithium-Ion battery. All you are doing is wearing it out prematurely by deep cycling. Every time you do this you destroy your over all battery life a little.
I have posted about this here in several thread, and I am getting a little tired of having to tell people NOT to do this because they don't search for themselves. Do a search on the forums for deep cycle li-ion and see for yourself.
If you want to know the technical reasons why, Google is your friend.
Click to expand...
Click to collapse
went to your link, and found this..
http://www.ehow.com/how_6803484_do-lithium-battery-cell-phone_.html
anyways, i've heard it all, and even i used to agree with people like you, and it probably DOES wear out my battery, but the first time i did it, i got 6 hours more in battery, does that mean that my batterys dying because its giving me more life?
hazard99 said:
so we just deal with what is perceived as faster battery depletion?
Im asking because As i have posted on another threat I am a complete freak about my battery life.
Click to expand...
Click to collapse
Yea, just chill. It is all in your head. From ROM to ROM, usage pattern to usage pattern, and app version to app version - there are just too many variables to worry about. Just use your phone, charge it when it needs it, and relax.
Your phone's battery is going to get less life as it ages. There is nothing you can do about that. Also, it will likely only get 2-3 years before it needs replacement. If it gets less than 2 years it is because you have been "conditioning" it. which ages it prematurely and also causes how long it lasts between charges to shorten as well.
Li-ion does not have a memory, so conditioning is an inherently false concept. Recalibrating the devices ability to read the battery is a different story, but it should only be done if it really needs it (like it thinks it is at 1% when it is at 20%), and it should never be done more frequently than a minimum of 30 charge cycles or if you charge it once a day when you go to bed no more than once a month. Less frequent is better.
So sorry, you need to find something else to obsess about. Might I suggest getting Team Whiskey to make BlackFroyo the default theme, use the 5 bar signal meter, the larger numbers on the battery, and the hacked camera the used the power button to take pictures. That would save all of us some time.
xriderx66 said:
went to your link, and found this..
http://www.ehow.com/how_6803484_do-lithium-battery-cell-phone_.html
anyways, i've heard it all, and even i used to agree with people like you, and it probably DOES wear out my battery, but the first time i did it, i got 6 hours more in battery, does that mean that my batterys dying because its giving me more life?
Click to expand...
Click to collapse
Nice link - try reading the stuff by the engineers that work with batteries for a living now instead. You do know eHow is just a site where any idiot that thinks they know something can post, right? Are you going to reference wikipedia next?
BTW when you recalibrated your battery and got 6 more hours, did you do anything else that might have explained it? You know like flash a new effing ROM? That might possible change a few things to do with your power usage.
T313C0mun1s7 said:
Nice link - try reading the stuff by the engineers that work with batteries for a living now instead. You do know eHow is just a site where any idiot that thinks they know something can post, right? Are you going to reference wikipedia next?
BTW when you recalibrated your battery and got 6 more hours, did you do anything else that might have explained it? You know like flash a new effing ROM? That might possible change a few things to do with your power usage.
Click to expand...
Click to collapse
it was a joke
and no, i flashed Nero 4.1, and then used it for a week thinking the phone would adjust to the battery and new rom, it didn't.
then i thought i'd just take a chance and recondition my battery, it was my first time, and it worked out great.
and trust me i'm a heavy user.
roughly 300-400 texts per day.
20-40 phone calls
music about 5 hours per day
and i play soem games, but thats understandable because playing dungeon defenders uses like 30% battery per hour bcz of the high graphics and such.
a bunch of app downloading.
Ok so Here's the deal
When I flash a rom I charge the phone till it hits 100%. I then reset the battery stats and go on about my day. With in a few minutes of being off the charger my battery has now dropped down to about 96 %. I do realize that batteries do not stay at 100% but this is crazy. I've only deep cycled my battery once for fear that it may damage my battery.
I Am using Teamwhiskeys ultra awesome bionix-v rom with ttabals oc kernal. I know I am to expect a slightly more rapid drain but this is crazy. I have even tried to lower the vcore and I slowed down the cpu to 800mhz. It still drains just as fast.
The odd thing to me is If i turn my phone off and let it fully charge to 100 percent reset stats then turn on phone It will show full for a minute then drop down to to 96 or 95 percent.
I personally think my battery is damaged but spare parts shows that it is ok.
So i am rather confused by this .
I know I should probably use the stock kernal but it seems like its just as bad with that.
I have looked at the threads about battery life and I am not expecting it to be amazing just hoping it will be ok!
Tell me what ya think !
mt battery play tricks on me too when my phone doesent see that im lookin at it it shows 90 when i look at it and phone notice it bounces to 85 like it hates me , lol but dont take my words for it P
Spare parts would show that too. I remember when I had my G1 spare parts would tell me it was fine. But a 3 hour full battery doesn't seem fine does it? Id suggest getting it replaced.
Sent from my HTC Vision using XDA App
Ill probably nurse it... but I am having major ocd type problems about it.
I cannot stress this part enough, so I'm putting at the top, do not do the following often, as it can have a negative effect on Li batteries if done too much.
You want to try what is known as a bump charge. With your phone off, charge to 100 percent. You will see the green battery icon with "100" on it once it reaches full. Unplug from the charger for a minute, then plug it back in, phone still off, and let it reach 100 again. If you want you can do this a third time, do keep in mind, bump charging too much or with any type of frequency can have negative effects on your battery, but doing it once in a great great while helps with with what you are experiencing.
thanks Br1cK'd and those who replied.
I have tried the bump charging method. I am affraid that my efforts to repair my battery are causing it more harm than good.
ok i just restored bionix v and had it charge to 100 percent
spare parts says
battery level 100
battery scale 100
battery health good
battery voltage says 4243mv
battery temp 30.0
hazard99 said:
Ok so Here's the deal
When I flash a rom I charge the phone till it hits 100%. I then reset the battery stats and go on about my day. With in a few minutes of being off the charger my battery has now dropped down to about 96 %. I do realize that batteries do not stay at 100% but this is crazy. I've only deep cycled my battery once for fear that it may damage my battery.
I Am using Teamwhiskeys ultra awesome bionix-v rom with ttabals oc kernal. I know I am to expect a slightly more rapid drain but this is crazy. I have even tried to lower the vcore and I slowed down the cpu to 800mhz. It still drains just as fast.
The odd thing to me is If i turn my phone off and let it fully charge to 100 percent reset stats then turn on phone It will show full for a minute then drop down to to 96 or 95 percent.
I personally think my battery is damaged but spare parts shows that it is ok.
So i am rather confused by this .
I know I should probably use the stock kernal but it seems like its just as bad with that.
I have looked at the threads about battery life and I am not expecting it to be amazing just hoping it will be ok!
Tell me what ya think !
Click to expand...
Click to collapse
There is one thing you are messing up. If you flash your phone on a 100% charge then you DO NOT need to wipe battery stats. You only have to wipe battery stats if you flash when your battery is not at 100%!
hazard99 said:
Ok so Here's the deal
When I flash a rom I charge the phone till it hits 100%. I then reset the battery stats and go on about my day. With in a few minutes of being off the charger my battery has now dropped down to about 96 %. I do realize that batteries do not stay at 100% but this is crazy. I've only deep cycled my battery once for fear that it may damage my battery.
I Am using Teamwhiskeys ultra awesome bionix-v rom with ttabals oc kernal. I know I am to expect a slightly more rapid drain but this is crazy. I have even tried to lower the vcore and I slowed down the cpu to 800mhz. It still drains just as fast.
The odd thing to me is If i turn my phone off and let it fully charge to 100 percent reset stats then turn on phone It will show full for a minute then drop down to to 96 or 95 percent.
I personally think my battery is damaged but spare parts shows that it is ok.
So i am rather confused by this .
I know I should probably use the stock kernal but it seems like its just as bad with that.
I have looked at the threads about battery life and I am not expecting it to be amazing just hoping it will be ok!
Tell me what ya think !
Click to expand...
Click to collapse
It's not out of the ordinary for a battery indicator to show a few percent drop rather quickly on a LiIon battery. Secondly you should take a battery indicator with a rather large grain of salt. Expecting precision in single digit percentages from the indicator is unrealistic and nearly impossible to rely on given the nature of discharge of a battery. Batteries do not charge or discharge in a linear manner, and people do not use battery powered devices in a linear way either.
It is a visual guide, not a precise and accurate indicator. Many custom roms have a percent accurate indicator, but don't mistake this with being dead-on accurate. It is merely an attempt to make it a BETTER visual GUIDE.
To evaluate battery life properly is moderately time consuming, though rather obvious. Use your device as you would normally. Pay attention to how long it stays charged. If it's not staying alive for a reasonable amount of time (12-24 hours depending on what you are doing of course), then it's time to dig deeper. Apps that wake up and generate unnecessary Partial Wake usage, a lot of background application syncing or apps with short sync intervals, being in an area with poor data/voice signal....these are the usual culprits.
Apart from situations where people are playing around with experimental kernels (i9000 derived kernels tend to vampirically drain battery a few percent an hour regardless), the things that drain your battery are....things that "use" your phone. The more you do (and the more your phone is doing with your permission while it's in your pocket) the less battery you will have.
In the end it comes down to asking yourself some questions. Do you need to automatically update facebook, myspace, twitter feeds constantly when you can manually update them and be inconvenienced by a 10-20 second wait? Do you really need to update 35 rss feeds in Google Reader?
Most people's power related issues come down to three things.
1). Apps that wake up without your knowledge and waste battery for no good reason (I'm looking at you Media Hub!!)
2).All those other apps and widgets that are updating inside your pocket when your not reading, watching, or caring about them.
3). Being in an area with poor data/voice signal, forcing your phone to "hunt" excessively for a better connection.
Apps that wake up and do god knows what without your knowledge can either be removed, disabled, or frozen. Examining partial wake usage can give you insight into what may be going on in that scenario. Apps can be "Frozen" with Titanium Backup Pro (paid) or App Freezer (free).
The other part that is within your control are all the apps/widgets you actively use, and your decisions about how often (or even if) they update themselves.
This was common on my droid x for so long while flashing but is it a good form of practice on the Rezound? The reason I am asking is I flashed Bamfs Cubed rom and my charging led goes from orange to green at 98%, never making it to 100. Would it be wise to go ahead and wipe battery stats and see if it fixes it? I presume there would be no harm to the system or battery in doing this.
Thanks!
ih8mydroid said:
This was common on my droid x for so long while flashing but is it a good form of practice on the Rezound? The reason I am asking is I flashed Bamfs Cubed rom and my charging led goes from orange to green at 98%, never making it to 100. Would it be wise to go ahead and wipe battery stats and see if it fixes it? I presume there would be no harm to the system or battery in doing this.
Thanks!
Click to expand...
Click to collapse
There's really no harm in doing it but Google has come out and said that wiping battery stats doesn't do anything.
http://www.xda-developers.com/andro...-battery-stats-does-not-improve-battery-life/
I always got a good laugh when people would post how "bump charging" & then deleting this file gave them an immediate dramatic increase in battery life.
This has to be the ultimate placebo effect.........
jmorton10 said:
I always got a good laugh when people would post how "bump charging" & then deleting this file gave them an immediate dramatic increase in battery life.
This has to be the ultimate placebo effect.........
Click to expand...
Click to collapse
Don't agree. Just like I don't agree with people saying task killers are bad. I guess with the way I use my phone I get different results. I have always noticed better battery life wiping battery stats. Now it could be that the OS will fix battery stats itself over time, but when you ate bouncing around a different rom every two days then the OS doesn't really get a better feel for the battery.
Plus...I came from the evo 4G where we uses trickle charge kernels and I want those back. Never had better battery life than when I had those. Was doing 35+ hours a charge on the stock battery.
Sent from my ADR6425LVW using XDA App
nosympathy said:
Don't agree. Just like I don't agree with people saying task killers are bad. I guess with the way I use my phone I get different results. I have always noticed better battery life wiping battery stats. Now it could be that the OS will fix battery stats itself over time, but when you ate bouncing around a different rom every two days then the OS doesn't really get a better feel for the battery.
Plus...I came from the evo 4G where we uses trickle charge kernels and I want those back. Never had better battery life than when I had those. Was doing 35+ hours a charge on the stock battery.
Sent from my ADR6425LVW using XDA App
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Click to collapse
tried telling our kernel devs about the trickle charge?
sent from tapatalk on my rezound
dyetheskin said:
tried telling our kernel devs about the trickle charge?
sent from tapatalk on my rezound
Click to expand...
Click to collapse
Haven't bothered since I never could get the thunderbolt devs to try it. There was "reported" cases with no proof that it caused some batteries to go bad. Even then they were cheap Chinese batteries that 2 people total I think it was claimed went bad.
It was always nice to pull your phone off the charger in the morning at 100% instead of it showing 100% and you pulling it off the charger to say 92%.
Sent from my ADR6425LVW using XDA App
nosympathy said:
Haven't bothered since I never could get the thunderbolt devs to try it. There was "reported" cases with no proof that it caused some batteries to go bad. Even then they were cheap Chinese batteries that 2 people total I think it was claimed went bad.
It was always nice to pull your phone off the charger in the morning at 100% instead of it showing 100% and you pulling it off the charger to say 92%.
Sent from my ADR6425LVW using XDA App
Click to expand...
Click to collapse
Well there is the fact that Li-Ion batteries can not be trickle charged after reaching full charge...
Well they can, but it will hurt the battery. And that isn't me talking from a few bad battery posts... but from knowing how Li-ion batteries work and charge... and reading engineering papers about Li-Ion batteries.
Luckily trickle charging is slow and most people only leave the battery on the charger over night at most. Plus they charge while the device is running and using power. Should someone leave the charger going for 24 hours, with the device off, we would probably be hearing about a fire.
What is probably happening with these trickle charge kernels is:
The phone is going to use some power at all times, the trickle charge is probably just enough to keep the phone running and preventing the battery from draining slowly.
This works because there are two ways to handle full charge status while the charger is still connected.
1) When the battery reaches full charge, the battery is isolated from the device preventing the device from draining the battery. The device then runs solely off the power coming in from the charger. (this method would not benefit from trickle charging, and forcing the battery to continue charging will at best slowly hurt the battery over time, and at worst cause a fire/explosion)
2) When the battery reaches full charge, the charger is isolated from the device. The device runs off the battery until the charge drops to a certain level (usually around 90% or so) before charging starts again.
The second way is how the Rezound does it, and most other devices as well.
The first way requires the ability to switch instantly to the battery from external power without any drop in voltage. This is difficult to do, as a drop in voltage could cause the device to crash/freeze, so many devices do not use this method.
Marine6680 said:
Well there is the fact that Li-Ion batteries can not be trickle charged after reaching full charge...
Well they can, but it will hurt the battery. And that isn't me talking from a few bad battery posts... but from knowing how Li-ion batteries work and charge... and reading engineering papers about Li-Ion batteries.
Luckily trickle charging is slow and most people only leave the battery on the charger over night at most. Plus they charge while the device is running and using power. Should someone leave the charger going for 24 hours, with the device off, we would probably be hearing about a fire.
What is probably happening with these trickle charge kernels is:
The phone is going to use some power at all times, the trickle charge is probably just enough to keep the phone running and preventing the battery from draining slowly.
This works because there are two ways to handle full charge status while the charger is still connected.
1) When the battery reaches full charge, the battery is isolated from the device preventing the device from draining the battery. The device then runs solely off the power coming in from the charger. (this method would not benefit from trickle charging, and forcing the battery to continue charging will at best slowly hurt the battery over time, and at worst cause a fire/explosion)
2) When the battery reaches full charge, the charger is isolated from the device. The device runs off the battery until the charge drops to a certain level (usually around 90% or so) before charging starts again.
The second way is how the Rezound does it, and most other devices as well.
The first way requires the ability to switch instantly to the battery from external power without any drop in voltage. This is difficult to do, as a drop in voltage could cause the device to crash/freeze, so many devices do not use this method.
Click to expand...
Click to collapse
Well if the device was off then the kernel wouldn't be running and trickle charging the battery but when turned on and the battery fully charged they would very slowly charge the battery as it dies. So there should be no risk of the battery catching fire. And anyway, the way the evo trickle charges worked is they would charge your battery to a certain voltage. Once it hit that voltage it would stop charging until it dropped. So it wouldn't be hard to protect the battery.
Did this for 6 months on the evo with no issues.
Sent from my ADR6425LVW using XDA App
My wifes x2 display is using 59% battery. Weve changed the timeout to 30s and brightness down really low. But her. Battery still dies very fast. Its only 2 months old. We ha e disabled bt wifi and gps. Any other tips?
One other question. When her phone dies she cannot plug it in and turn it on or it gets stuck on the motorola logo. Qe have to wait till droid boot animation to plug it in. Any ideas?
Sent from my DROID4 using xda premium
If you plug it in from off do you see the charging screen? Try plugging it in and holding the power button simultaneously if the phone is off.
Is the phone rooted and romd or stock?
Is it running 2.3.4?
Sent from my DROID X2 using xda premium
Its running 2.3.4 rooted but not romd. I had the phone for about a month and had no issues with it. However i never allowed it to die. Shes not a heavy user but my main concern is why the display uses 59% where my d4 uses only 26% on the same settings as hers. Can i unroot the phone in case i have to return it under warranty?
Sent from my DROID4 using xda premium
when the phone dies you need to plug it in and wait until the battery on charge only screen shows at least 10% before the system will, allow you to turn it on
if you have BSR installed tho, as soon as it dies you can plug it in and when BSR comes up you can just choose reboot system now.
and the reason you d4 uses less battery on screen it's because I believe it is an amoled screen, which consumes much, lower power levels than an LCD screen
Sent from my DROID X2 using Tapatalk
Have you tried recalibrating the battery too?
No. How do i do that? Thanks
Sent from my DROID4 using xda premium
First, make sure the battery is completely charged, then boot into custom recovery (BSR). Go to advanced options (towards the bottom of the list) and there should be an option that says 'recalibrate battery'. Once you recalibrate it, reboot back into android. I usually always let my battery run completely out after doing a recalibration before recharging it after a re-cal. If you find on your first discharge after recalibrating that your phone tells you you've only got 20% left and it would normally only last an hour before, depending if it needed the re-cal it may last 2 hours. Those numbers are just hypotheticals. Point is, recalibrating lets android know it's for sure 100% full at the start, but it doesn't necesarily know the end point until it gets there by allowing a full discharge. Also, the lithium batteries our phones use do best when recharged around 15-20%. It's actually bad to let them completely discharge all the time. And if you have multiple batteries and one may be sitting for a while, it's best to store them between 30-40%. Let me know if you need any more clarification.
Im going to try that thank you
Sent from my DROID4 using xda premium
More importantly, if you are already rooted and such, why not run a custom ROM? CM7 and/or Eclipse should give you a good boost in battery life. Running CM7 my standard battery lasts 18-24 hours with light ish usage. And that's with my original battery from when the DX2 first came out. I also have an extended battery I am running right now, but don't have data on that one yet since it's still discharging now. I do know that swapping between batteries of different capacities pisses android off sometimes though lol. Aside from custom roms, there are scripts and apps/software-based mods that can help it significantly too. Namely, wifi vs 3g usage, turning 3g data off when your phone is not being used, etc... I started off with an original DX but VZW gave me a free upgrade to DX2 after my 6th warrantied DX. I miss Rubix's ROM and being able to overclock and undervolt... My DX would last 2+ days sometimes when I had it all dialed in.
Its now my wifes phone. Since she already has had time getting used to stock i doubt she'll let me put a rom on it lol. But ill try
Sent from my DROID4 using xda premium
Well fortunately you've got a Blur-based and AOSP-based option for it. I know what you mean though, my gf likes her Sense-based UI, but had to give it up for a semi-funtioning Eris. I think she is getting a Bionic sooner than later... HTC is garbage.
Maleko48 said:
First, make sure the battery is completely charged, then boot into custom recovery (BSR). Go to advanced options (towards the bottom of the list) and there should be an option that says 'recalibrate battery'. Once you recalibrate it, reboot back into android. I usually always let my battery run completely out after doing a recalibration before recharging it after a re-cal. If you find on your first discharge after recalibrating that your phone tells you you've only got 20% left and it would normally only last an hour before, depending if it needed the re-cal it may last 2 hours. Those numbers are just hypotheticals. Point is, recalibrating lets android know it's for sure 100% full at the start, but it doesn't necesarily know the end point until it gets there by allowing a full discharge. Also, the lithium batteries our phones use do best when recharged around 15-20%. It's actually bad to let them completely discharge all the time. And if you have multiple batteries and one may be sitting for a while, it's best to store them between 30-40%. Let me know if you need any more clarification.
Click to expand...
Click to collapse
Or you can download the app battery calibrator (haar a red Android as the pic) and follow the directions
Sent from my MB870 using xda premium
letting your battery die completely is not recommended no matter what you've been Told
Li-on batteries were designed to last longer when you don't let it die completely
start charging around 15%-10%, 5 is pushing it cuz its most likely gonna shut down before you see 5, trust me, it's bad for the life of tour battery to let it drain completely, just Google Li-on battery life, recommendations and u can read for yourself lol
ashclepdia said:
letting your battery die completely is not recommended no matter what you've been Told
Li-on batteries were designed to last longer when you don't let it die completely
start charging around 15%-10%, 5 is pushing it cuz its most likely gonna shut down before you see 5, trust me, it's bad for the life of tour battery to let it drain completely, just Google Li-on battery life, recommendations and u can read for yourself lol
Click to expand...
Click to collapse
Yeah I know you're not *supposed* to let them discharge all the way but sometimes you have to and sometimes it just happens. For instance, my extended battery that I just did a re-cal on the other day has been sitting at 1% for the past few hours and is currently reading 1day 12 hours of uptime. (I shut it off the other night though and it is still discharging from its initial charge that I did the re-cal on.) So if I would have recharged it at 5% or whatever, I would be losing a decent chunk of available battery because android thought it was empty when it really wasn't, thus skewing the battery's voltage window.
Maleko48 said:
Yeah I know you're not *supposed* to let them discharge all the way but sometimes you have to and sometimes it just happens. For instance, my extended battery that I just did a re-cal on the other day has been sitting at 1% for the past few hours and is currently reading 1day 12 hours of uptime. (I shut it off the other night though and it is still discharging from its initial charge that I did the re-cal on.) So if I would have recharged it at 5% or whatever, I would be losing a decent chunk of available battery because android thought it was empty when it really wasn't, thus skewing the battery's voltage window.
Click to expand...
Click to collapse
that will only happen with extended batteries or one of those "Chinese", aftermarket batteries
regardless, battery life of Li-on batteries will decrease from letting it completely discharge, the more times you do it, the less your battery health will be.(BTW when do you "have to" let it discharge completely? , I'm not "calling you out or trying to "make you look stupid" or anything, I'm just curious what you meant by that?)
when I say 15-5% don't look at it as when Android reports that percentage, the x2 will, NEVER show an extended battery percentage correctly no matter how many times you "calibrate" that's just how it goes, it doesn't realize there is a higher capacity battery in the device larger than 1500mah, what you wanna do is use a battery voltage widget to monitor battery left, when it starts to get around 3500mV is when you are gonna want to charge I believe, (I think that 3200 is completely dead, and 4200 is topped off)
also,, wiping battery stats is a useless practice, not long ago I believe a Google developer wrote about why it's useless, apparently battery stats only has to do with the battery use settings stats about which apps have used which amount of battery. the battery stats gets reset/wiped EVERY time you get to a near fill-full charge (hence why the battery use graph resets itself when u almost fully charged, if you stop charging around 60-70% it wont reset)
reference:: http://rootzwiki.com/_/articles/wiping-battery-stats-is-pointless-says-google-r316
ashclepdia said:
that will only happen with extended batteries or one of those "Chinese", aftermarket batteries
regardless, battery life of Li-on batteries will decrease from letting it completely discharge, the more times you do it, the less your battery health will be.(BTW when do you "have to" let it discharge completely? , I'm not "calling you out or trying to "make you look stupid" or anything, I'm just curious what you meant by that?)
when I say 15-5% don't look at it as when Android reports that percentage, the x2 will, NEVER show an extended battery percentage correctly no matter how many times you "calibrate" that's just how it goes, it doesn't realize there is a higher capacity battery in the device larger than 1500mah, what you wanna do is use a battery voltage widget to monitor battery left, when it starts to get around 3500mV is when you are gonna want to charge I believe, (I think that 3200 is completely dead, and 4200 is topped off)
also,, wiping battery stats is a useless practice, not long ago I believe a Google developer wrote about why it's useless, apparently battery stats only has to do with the battery use settings stats about which apps have used which amount of battery. the battery stats gets reset/wiped EVERY time you get to a near fill-full charge (hence why the battery use graph resets itself when u almost fully charged, if you stop charging around 60-70% it wont reset)
reference:: http://rootzwiki.com/_/articles/wiping-battery-stats-is-pointless-says-google-r316
Click to expand...
Click to collapse
Thanks for pointing that out. I regularly swap between my standard and extended batteries (both straight from VZW) because I'm always out and about and have used re-cal's to keep the perceived percentages from being skewed since I like to know how much life I have left in my phone so I know if I am gonna be able to find my way home or not, lol. (I ride my bike far and wide.)
I remember reading a while back that every time you un-plug your phone from a full charge that battery bin file gets re-written as 100%. So regardless of what android reports, yes, you will always get to use your battery until it is fully dead, but when swapping between two different capacities of batteries the reported percentages get skewed. And as I mentioned before, more often than not I am far from home on a bicycle in a city I only know a fraction of, and many nights somewhat inebriated, haha. I <3 my android, but it can certainly be a lot of work to keep up with.
Maleko48 said:
Thanks for pointing that out. I regularly swap between my standard and extended batteries (both straight from VZW) because I'm always out and about and have used re-cal's to keep the perceived percentages from being skewed since I like to know how much life I have left in my phone so I know if I am gonna be able to find my way home or not, lol. (I ride my bike far and wide.)
I remember reading a while back that every time you un-plug your phone from a full charge that battery bin file gets re-written as 100%. So regardless of what android reports, yes, you will always get to use your battery until it is fully dead, but when swapping between two different capacities of batteries the reported percentages get skewed. And as I mentioned before, more often than not I am far from home on a bicycle in a city I only know a fraction of, and many nights somewhat inebriated, haha. I <3 my android, but it can certainly be a lot of work to keep up with.
Click to expand...
Click to collapse
trust me, I know exactly what you're talkin bout
except mostly riding buses/trains for mE
I have two standard and one extended, I always use the extend first since it will never report correctly when I'm out, then I switch to the standard ones so when they are running low, I KNOW when they will die lol
same here, wifes x2 battery last 2 days..awesome
I tried searching this in a number of places. I couldn't find what I was looking for, although it didn't help I had trouble using the right words to search for it with, but here goes.
I'm running CleanROM Reborn 1.1, I love it! Other info is also in my signature. Once I turned on the percentage number for my battery level, I really started to notice this.
The number will stay at a number for awhile sometimes, even when I use it, then other times it will jump several points within a minute. It doesn't drain consistently. Anyone have any insight or suggestions? It's more annoying than anything else. My battery life is alright.
I would've tried wiping battery stats, but I hear that doesn't really do anything.
Thanks.
download Battery Calibration from the Google Play Store, then charge your phone to %100. open the Battery Calibration app and calibrate it. There is also instructions inside the App if my instructions are unclear
Im going to try this but for some reason mine only go to about 96%. Never 100% lately so I am not sure if I should do it then or just leave it charged until it is 100% and hope it gets there.
.Bambino said:
Im going to try this but for some reason mine only go to about 96%. Never 100% lately so I am not sure if I should do it then or just leave it charged until it is 100% and hope it gets there.
Click to expand...
Click to collapse
Not to hijack the thread, but the phone is designed to fully charge and then discharge to 95% and then charge to 100% again, rinse, and repeat. This is to keep the battery from becoming destroyed by overcharging. Maybe that's what you are seeing, Bambino.
Sent from my PG86100
Iceman248 said:
The number will stay at a number for awhile sometimes, even when I use it, then other times it will jump several points within a minute. It doesn't drain consistently. Anyone have any insight or suggestions? It's more annoying than anything else. My battery life is alright.
I would've tried wiping battery stats, but I hear that doesn't really do anything.
Thanks.
Click to expand...
Click to collapse
I've noticed this too on Ics leak roms. It sips power with screen off, then drains quickly when on sometimes and hardly at all other times. Mine just sat at 82% for the past 20 minutes, then dropped to 76% over the past five. I've heard battery calibration is bunk, but I'll try the previously mentioned app and see.
Some roms do not use a percentage because they are so inaccurate and cause the user to obsess
Sent from my PG86100
ICS
MeanRoom-ICS-v18 .... Excellent
S-ON Hboot 1.5 Unlocket Last update 2.17.xx
flash whit 4EXT r3
A little info on batteries
The important thing to remember about Lithium Ion batteries is that when you do charge them, bring them up to full charge before taking them off the charger.
They all have a circuit board in them that remembers a full charge. (If you've every taken one apart you'd see this) When you charge them this chip will restore the amount of power that has drained.
Partially charging them will screw up this function. And screw up the battery.
Deep Cycling is good for them but not all the time. Once a month is good for them.
A good rule of thumb, but not absolutely necessary is to discharge them 50% and then bring them up to a full charge. Obviously this is not always possible when playing video games or watching movies. I always try to leave it on the charger when watching movies in the cradle.
There is an app on the Market called Battery Repair. It makes an attempt to reset this chip on the battery by meticulous monitoring the charge and capacity left in the battery. Running diagnostics and setting the battery to its best state. Its the only one out there that does this.
Battery Calibration app is good if you change roms or batteries alot.
Here is what it does:
Calibration needs to be done after flashing a new ROM, but you can calibrate any time you think your battery is miscalibrated. This program does it by removing the batterystats.bin system file. The OS generates a new clean batterystats file soon, thus any fake information from the previous ROM is removed.
It's suggested, but not necessary, to let the phone fully discharge after calibration, then charged to 100% without break.
The app shows your actual battery status, and only allows you to start the calibration (i.e. removes the file) when it's fully charged, unless you force earlier calibration.
The voltage meter can be useful too. Full charge is around 4200mV.