[Q] NFC: Will it Affect Battery? - Sony Xperia Z Ultra

Hey there,
I just wondering, will it take a big battery drain by letting NFC all the time? with NFC tech it is pretty convenient to use, i wonder how much will it take for NFC to be turned on all the time? i have my first MBH10 so pretty excited to turn it on with just a tap Thx

hansip87 said:
Hey there,
I just wondering, will it take a big battery drain by letting NFC all the time? with NFC tech it is pretty convenient to use, i wonder how much will it take for NFC to be turned on all the time? i have my first MBH10 so pretty excited to turn it on with just a tap Thx
Click to expand...
Click to collapse
NFC is limited to a distance of approximately 4 centimeters while Bluetooth can reach over 10m.
NFC technology consumes very little power compared to standard Bluetooth technology. The only difference is when NFC has to power a passive, (unpowered) source such as an NFC tag. Then its about the same as bluetooth.
The latest development in Bluetooth technology, Bluetooth low energy (BLE), is targeted at low power consumption and uses even less power than NFC.
I guess to answer quickly.. if you have NFC on all day you'll probably lose less than 1% battery.

hansip87 said:
Hey there,
I just wondering, will it take a big battery drain by letting NFC all the time? with NFC tech it is pretty convenient to use, i wonder how much will it take for NFC to be turned on all the time? i have my first MBH10 so pretty excited to turn it on with just a tap Thx
Click to expand...
Click to collapse
Worth adding to @hamdogg post that the NFC features of most devices is only useful for initial pairing, after that the pair is stored and Bluetooth is used. Unless you are indeed using tags or transferring data to others or something it really is pointless having it on all the time.
Sent from my C6833 using XDA Premium 4 mobile app

SpyderTracks said:
Worth adding to @hamdogg post that the NFC features of most devices is only useful for initial pairing, after that the pair is stored and Bluetooth is used. Unless you are indeed using tags or transferring data to others or something it really is pointless having it on all the time.
Sent from my C6833 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Well reducing time by not toggling the NFC button will shorten the time to do an instant pairing i suppose. to turn it on when you need it will make an additional step in my book

hansip87 said:
Hey there,
I just wondering, will it take a big battery drain by letting NFC all the time? with NFC tech it is pretty convenient to use, i wonder how much will it take for NFC to be turned on all the time? i have my first MBH10 so pretty excited to turn it on with just a tap Thx
Click to expand...
Click to collapse
NFC doesn't even register on my battery usage screen. I leave it on all the time and have excellent battery life.

JaredP said:
NFC doesn't even register on my battery usage screen. I leave it on all the time and have excellent battery life.
Click to expand...
Click to collapse
I think something is up with my phone
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blueether said:
I think something is up with my phone
Click to expand...
Click to collapse
Urm, yeah, that no good!
Sent from my C6833 using XDA Premium 4 mobile app

blueether said:
I think something is up with my phone
Click to expand...
Click to collapse
That's just your usage compared to the other things. Your Ultra has been running for 38 hours and it's at 69% which tells me that you haven't really touched it that much, and that's why the screen is only at 20%.
The screen has been off, so it has not been using power. NFC has been on for 38 hours straight, so it still uses power when other things, like the screen, is off, and thereby using more power than the screen has been using (since you haven't really used the screen that much).
Android's battery monitor is complete garbage, and it's not as straight forward as you would think. Use BBS for actual battery usage.
Nothing here looks ununsual to me. NFC has not used 26% of your battery.

Related

Rom with best battery life?

Hey guys anyone know from experience which Rom gives you the very best battery life? I'm a somewhat heavy user and trying to get my note to last me through the day. Or the best tweaks that don't take away too much from performance and convience? Thanks a ton.
No one rom does, everyone will claim the rom they use does
I'm a heavy user
No rom will give me 2 days, although folks will claim it
It all depends on how you use your phone
If you're a "light" user, then any rom will give you long life cuz you're not using your phone
Best thing is to put a screen filter app on any rom you choose, that'll extend your life since the screen is biggest hog
Or wait til we get kernels with undervolting
In my experience the people that constantly complain about battery life are horrible at managing their device. If you don't have ****ty apps spying on you while running unnecessary processes in the background you a should get through the whole day. my note comes off the charger at 9am and has about 15% battery left by 2am. That's with plenty of screen on time and watching an episode from hulu on 4g. I am on wifi about 70% of the day though. Screen off timeout is set to 1 minute and weather and stock updates every 4 hours.
I download nothing unless the app maker is well known and trusted and I believe that is important. Some live wallpapers want full network access.no thank you.
P.s. Don't use the one percent battery meter.ignorance its bliss trust me. I'm so much happier not knowing the exact percentage.
Sent from my SAMSUNG-SGH-I717 using xda premium
Well right now I don't have anything running (climbing on OP feed)
Startup Manager I have bought which supposedly will stop programs at startup. Any thoughts? I've read where it ia better to let things run naturally. I have about 100 apps.
Samsung has built in power saver? Used from time to time..anyone else use this? Juice defender better?
There is a spreadsheet pn here that says gives unnecessary apps we can delete. Suggested???
Without creating another similar thread would love to hear some thoughts.
Sent from the OBJECTIFIED Modified Note. Best Phablet Ever
I just went back to the Note. I have very few apps other than stock. My main usage is exchange email, web, calls and texts. Running stock I get about 9 hours or so depending on calls.
My only gripe is when I do travel and use GPS Navigation the car charger struggles to keep up even with the screen off. Hope a new kernel will resolve this issue
Sent from my SAMSUNG-SGH-I717 using xda premium
Its all comes down to user experience
No rom is the best
No rom has the best battery
No rom has the best features
Try them all out and see which works out best for you
Sent from my SAMSUNG-SGH-I717 using Tapatalk 2
Big Dawg 23 said:
My only gripe is when I do travel and use GPS Navigation the car charger struggles to keep up even with the screen off. Hope a new kernel will resolve this issue
Sent from my SAMSUNG-SGH-I717 using xda premium
Click to expand...
Click to collapse
The problem isn't your kernel it is your car charger. The note has higher requirements than most phones. I have a car charger that won't even be recognized as connected.
Sent from my SAMSUNG-SGH-I717 using xda premium
You can't really say ones the best but cm9 is giving me great battery life
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
Big Dawg 23 said:
My only gripe is when I do travel and use GPS Navigation the car charger struggles to keep up even with the screen off. Hope a new kernel will resolve this issue
Click to expand...
Click to collapse
It's not as much of a kernel issue as it is a characteristic of the hardware. No amount of kernel tuning will magically allow, say, the display to consume less power while being at the same brightness. Make sure your car charger is capable of putting out the full 1 A current that the Note can pull. If you are running with the screen at full brightness, GPS for Navigation, 4G data to pull down map tiles, and Bluetooth to your car, the Note will need about 1 A of power. Check the Accessories forum for many threads on which car adapters and USB cables will work with the Note. I am using a Bracketron 12V adapter, and it is able to keep up with the Note running full tilt.
Out of all I've tried, so far KING KANG from DaGr8 has given me the best battery life.
_________________________________
www.TheShortBusRiders.com
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Battery drained with JB..

I see that the major cause of battery usage is the WiFi, exactly like it was on WW28, the worrying thing is that I also spotted that during the night, the Prime lost 2%, even though all stuff was turned off with the Prime in sleep
All Sync, WiFi and all the things that could use WiFi are turned off and all "checks" are set in settings that could be checked/unchecked.
On WW28 and using the modded prop, I never lost a % during night.. so maybe the only way to have it working good again is to have a new prop suitable for the JB (I asked in the proper thread in Dev. forum)
Any other experiencing battery drain with JB? And especially a higher WiFi battery usage again?
bimbobo said:
I see that the major cause of battery usage is the WiFi, exactly like it was on WW28, the worrying thing is that I also spotted that during the night, the Prime lost 2%, even though all stuff was turned off with the Prime in sleep
All Sync, WiFi and all the things that could use WiFi are turned off and all "checks" are set in settings that could be checked/unchecked.
On WW28 and using the modded prop, I never lost a % during night.. so maybe the only way to have it working good again is to have a new prop suitable for the JB (I asked in the proper thread in Dev. forum)
Any other experiencing battery drain with JB? And especially a higher WiFi battery usage again?
Click to expand...
Click to collapse
Mine is the complete opposite lol
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Ziocomposite said:
Mine is the complete opposite lol
Click to expand...
Click to collapse
The difference might be explained by the fact that if you use more "brightness" than I do, then the percentage of what screen and wifi use may vary.
My screen brightness is 20% then my value for screen is lower than yours and the battery higher, because that's the proportional values.. I think.
That's the best part, the tablet is usually 1-25% brightness the majority of the time. Prior to JB, similar usage would have wifi taking close to or above 2-1 ratio. <3 this update
I've found that I've got about 5% increase in battery life. There are new Power Saver section in settings so you might want to mess with those and see if it helps. From what I've seen it's really only to turn stuff off at a user defined power %. Still, check it out.
theandies said:
I've found that I've got about 5% increase in battery life. There are new Power Saver section in settings so you might want to mess with those and see if it helps. From what I've seen it's really only to turn stuff off at a user defined power %. Still, check it out.
Click to expand...
Click to collapse
Thanks, but I did that.
I found a bug too.
When you change the power settings from the quick settings window in the "desktop", the changes are not recognized in the "power setting" you refer too, you have also to change there.
So if I choose balanced one place I have to do the same in the other too.
I see only that the WiFi is much faster at start when waking up from standby, but I think there is something wrong in these power settings.
I never lost 2-3% at night when the Prime was on WW28... and the battery/WiFi seems to drain faster now..
Just let things settle. These things takes time after updates. Its too early for any accurate readings anyways.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
Are you really complaining about 2% overnight battery drain? Come on man! Battery on my prime has been better on jb
Sent from my ADR6400L using xda app-developers app
mdeblaz said:
Are you really complaining about 2% overnight battery drain? Come on man! Battery on my prime has been better on jb
Sent from my ADR6400L using xda app-developers app
Click to expand...
Click to collapse
Remember that we do not use all same settings, and/or use devices same way. Making a comparison is only possible on the same device and the same setup/use.
I am happy that you are seeing improvements.
I will see in a week what is the result for me.
How could I imagine they would ever get it straight
Bad, it's worse than on .21.
Edit 100203
Try my thread http://forum.xda-developers.com/showthread.php?t=1674551
Aye, as far as I can notice it's draining a tiny bit quicker. I keep mine at max brightness IPS+ (except for late at night every now and again) but don't get more than an hour or two's use a day on average. Usually go anywhere from three to six days without charging, depending on how forgetful I am with turning WiFi off.
I can't factory reset like you until there's a new root method, but also like you I factory reset and restored only specific apps' data so the update would go as smoothly as possible. To no avail lol, but oh well. I'll give some more in-depth info as I have time to.
Sent from my HTC Vision using xda premium

Battary Life

Hi All!
Please post you screenshot with battary life and with how many times screen is on
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espionage724 said:
Click to expand...
Click to collapse
Thank for you post. What apps and sync running?
And for All.
Please post your Screnshot with same text(what you using).
In this Thread we collect information about battary life!
amaectpo said:
Thank for you post. What apps and sync running?
And for All.
Please post your Screnshot with same text(what you using).
In this Thread we collect information about battary life!
Click to expand...
Click to collapse
All this on sync:
As for apps, nothing too heavy, just the occasional look at Browser, Ingress, and (alarm) Clock.
Isn't that battery life rather awful? i thought atleast 6-7 hrs of on screen time was reasonable?
I usually get 9-10 hours screen time average when I don't game to much. Gaming a lot brings it down to 5-6 hours of screen time.
Sent from my SCH-I535 using xda app-developers app
Coming from a Asus TF300 with dock which gives me 16 plus hours I am finding the N10 battery life pretty bad.
This on top of the light bleed, lack of memory card slot and the not so cheap price is making me thinking in returning it.
It is a nice Tablet but I am not sure if worth the asking price,
I game, surf, all kinds of stuff and get at least 10hrs.
But, I find the screen really really bright, even on the lowest setting in bright light in the house. Mine is always on the lowest setting and probably why my battery life is good.
Bru87tr said:
I game, surf, all kinds of stuff and get at least 10hrs.
But, I find the screen really really bright, even on the lowest setting in bright light in the house. Mine is always on the lowest setting and probably why my battery life is good.
Click to expand...
Click to collapse
This is so important for battery life. I just understand why people set brightness so high... Screen brightness will kill battery life..That's pretty much standard on any portable device.
cdejesus1119 said:
This is so important for battery life. I just understand why people set brightness so high... Screen brightness will kill battery life..That's pretty much standard on any portable device.
Click to expand...
Click to collapse
I agree, even my ipod I keep on the lowest setting.
I have finally converted my daughters into a very low setting. Your eyes will adjust and you will see after and realize even at 25% it is very bright.
People automatically want the wow factor and turn up the brightness most of the way. I can't have it a tick and it burns my eyes.
I am not sure how people have them up so high, this screen is really bright.
A bright screen is useful in the sun though
My brightness was around half-way; I just put it at lowest, so I guess I'll try seeing how it goes
espionage724 said:
My brightness was around half-way; I just put it at lowest, so I guess I'll try seeing how it goes
Click to expand...
Click to collapse
This. I just turned off auto and set it to lowest setting. We shall see how this affects battery life.
dh350nwo said:
This. I just turned off auto and set it to lowest setting. We shall see how this affects battery life.
Click to expand...
Click to collapse
This or install a third auto brightness and let it work its magic. Set the settings lower so that it never goes high, but does adjust to outside brightness
Screen time only mattets when you want to use it continuously and dont have access to charger like on a plane journey. If you are getting by 2 days without charge with moderate screen time then its good enough as you will get access to a charger in that time
Sent from my SAMSUNG-SGH-I747 using xda premium
viking2.0 said:
Screen time only mattets when you want to use it continuously and dont have access to charger like on a plane journey. If you are getting by 2 days without charge with moderate screen time then its good enough as you will get access to a charger in that time
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
Wow, so many of you getting such good battery life. Mine hardly manages 6 hours with WiFi and screen at 25 p.c. most of the time. Is this a faulty device?
Good battery life especially no wake locks seen
Sent from my Nexus 10 using xda premium
Why is Google maps using s tin of battery when I never use it??? Also dolphin beta is a Huge battery hog!!!!!!!
waltthizzney said:
Why is Google maps using s tin of battery when I never use it???
Click to expand...
Click to collapse
Location services run in the background
Thats kinda depressing...
My note 2 easily beats that :banghead:
Afraid have to go for a ipad mini
(I'm no fanboy lol)
Sent from my GT-N7100 using Tapatalk 2

Qualcomm BatteryGuru

Anyone used this app yet? Its on the play store and it looks decent but may just be another regular battery extender. I have it "learning" now...
km8j said:
Anyone used this app yet? Its on the play store and it looks decent but may just be another regular battery extender. I have it "learning" now...
Click to expand...
Click to collapse
My friends use it on their Moto G, and it works pretty good. Better than any other battery saver, according to them.
fr4n said:
My friends use it on their Moto G, and it works pretty good. Better than any other battery saver, according to them.
Click to expand...
Click to collapse
Yea looking to see what settings people are using
I just installed this as well. I always had good luck with this one on previous androids. I will post up my settings after its done " learning "
I have it installed on my og moto x and I saw a difference in battery after a few days after it completed its setup process. Also you need to go into the settings and enable low power mode
joejoejo said:
I have it installed on my og moto x and I saw a difference in battery after a few days after it completed its setup process. Also you need to go into the settings and enable low power mode
Click to expand...
Click to collapse
Where in the settings is that option? Something in the phone itself or in Battery Guru?
Hemotherapy said:
Where in the settings is that option? Something in the phone itself or in Battery Guru?
Click to expand...
Click to collapse
You enable Low Power Mode within BatteryGuru. You can set it to activate automatically after your battery dips below a specific percentage. It lets you also specify the actions you want the phone to do, such as reduce screen brightness, reduce app refreshes, disable data/wifi/bluetooth, and basically anything that can eat at your battery life.
I've used the app with other snapdragon powered phones and it does provide a significant boost in battery life. I'm currently using it on my Galaxy S5 and it helps extend an already long battery life. I'm excited that my custom Moto X is currently out for delivery right now, I keep checking the door hoping it arrives!
Anyone have any results? Particularly any noticed performance loss?
Thanks
66racer said:
Anyone have any results? Particularly any noticed performance loss?
Thanks
Click to expand...
Click to collapse
Most of the reviews say it causes excess battery drain
Sent from my XT1096 using XDA Free mobile app
It just turns radios on and off, there's nothing you can't do yourself just as easily.
akellar said:
Most of the reviews say it causes excess battery drain
Sent from my XT1096 using XDA Free mobile app
Click to expand...
Click to collapse
Yes it does causes battery drain, maybe because it wants us to enable location services for its group of features to work! thats weird, i dont understand why a battery saver application wants location services to save battery. I uninstalled it and got the Greenify apps, works quite well!
Wow there is no way according to this.
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---------- Post added at 07:17 AM ---------- Previous post was at 07:16 AM ----------
I have to charge battery every night. Always 10 to 20% by the time I get home.

Battery ZV6

On Wifi, my battery life is fine. It takes a couple hours to fall off the 100% mark. At work my battery will fall 8-10% within a couple hours. This only seems to be since going from ZV4 to ZV6. At 1st I thought is was the trade off for better performance, but I don't think that's the case now. Greenify doesn't seem make a difference outside of my home wifi. My gsam battery app shows android system is the main culprit after screen. Could it be the ZV6 radio to blame?
Sent from my LGLS990 using XDA Free mobile app
MikeDroid said:
On Wifi, my battery life is fine. It takes a couple hours to fall off the 100% mark. At work my battery will fall 8-10% within a couple hours. This only seems to be since going from ZV4 to ZV6. At 1st I thought is was the trade off for better performance, but I don't think that's the case now. Greenify doesn't seem make a difference outside of my home wifi. My gsam battery app shows android system is the main culprit after screen. Could it be the ZV6 radio to blame?
Sent from my LGLS990 using XDA Free mobile app
Click to expand...
Click to collapse
I average about 5.5hr of screen on time with mild to heavy usage (ZV6), which on this high power screen I think is pretty great. This is with me barely ever being on wifi since I'm hardly ever at home to use it being due to my profession as a field insurance adjuster. And I use my phone literally all day long whether its emails, phone calls, texts, or surfing for general information. So, Im not sure what you are considering "bad" as far as battery, but I am not complaining at all.
mistermidas said:
I average about 5.5hr of screen on time with mild to heavy usage (ZV6), which on this high power screen I think is pretty great. This is with me barely ever being on wifi since I'm hardly ever at home to use it being due to my profession as a field insurance adjuster. And I use my phone literally all day long whether its emails, phone calls, texts, or surfing for general information. So, Im not sure what you are considering "bad" as far as battery, but I am not complaining at all.
Click to expand...
Click to collapse
Right, mine used to have pretty amazing battery life too. Now, not so much. I have decent 4g at work, so my phone doesn't have to shop for a signal. On wifi, business as usual.
Sent from my LGLS990 using XDA Free mobile app
I know clearing battery stats has been dismissed as voodoo by the TWRP devs, but it seems to have helped a lot. I'll keep watching and make sure no placebo in effect.
Sent from my LGLS990 using XDA Free mobile app
Usually, charge the phone up to 100%, run it down to about 10% charge it back up and it usually has to learn how the ROM runs.
But glad you got it working.
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For some reason see the first wakelocks thats a huge number is it normal???
MikeDroid said:
I know clearing battery stats has been dismissed as voodoo by the TWRP devs, but it seems to have helped a lot. I'll keep watching and make sure no placebo in effect.
Sent from my LGLS990 using XDA Free mobile app
Click to expand...
Click to collapse
It's not the devs here who say it's voodoo, it's Google: http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
meyerweb said:
It's not the devs here who say it's voodoo, it's Google: http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
Click to expand...
Click to collapse
If I recall it used to be an option in TWRP and Clockwork. Never knew why they took it out. In my case, clearing stats seems to have worked. That was a good read you provided with interesting comments.
Sent from my LGLS990 using XDA Free mobile app

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