Develop Bugs

Battery Drain

Hi All,
When i look into (almost) all roms i see the problem with the battery drain problem.
To bad i do not have the knowledge to find out what to do.
But i think that some smart developers work together to find a solution about this battery drain problem.
So that's why i start this thread so we can discuss this

raiz said:
AdamG's Official Froyo HTC Sense might hold the key to this since it seems to give about 2 days battery performance with the original battery unlike any other rom.
Click to expand...
Click to collapse
It would be great if he could share the knowledge
I am using LeeDroid 1.4c and I too experience battery drain issues...

Someone tried this one http://forum.xda-developers.com/showpost.php?p=7170484&postcount=173 ?

There's a really good battery life on the OD 2.3 ROM Love it!
/CK
Sent from my HTC Desire using XDA App

Café King said:
There's a really good battery life on the OD 2.3 ROM Love it!
/CK
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
Thanks, but i don't like the interface.. want have the sense feeling

Drain
Tested a lot of roms with froyo and sense. The roms based on 2.06 base are draining relative more then the roms based on 2.04.
Above is not scientificly tested.

Charge to 100% , go to recovery , advanced , wipe battery stats. Enjoy greater baterry life
Sent from my HTC Desire using Tapatalk

I had NONE battery drain problems on any of ROMS 2.1 or 2.2, and i did try alot of them.
Maybe theres something wrong with your phone itself (battery).
But definetly try wipe battery stats in recovery.

Since 08:00 morning had WiFi on.. network Data of... and now 12:02 battery is now 90%. DId have play with config the Tasker Tool (Great app).
Tomorrow i will do the test again but then with Network Data on and WiFi off.

raiz said:
AdamG's Official Froyo HTC Sense might hold the key to this since it seems to give about 2 days battery performance with the original battery unlike any other rom.
Click to expand...
Click to collapse
Yup, that ROM has the best battery life by far...
Sent from my HTC Desire using XDA App

people are having mixed results on the battery perfermance of adam's sensefroyo rom. i experienced a poorer battery life compared to eclair (i used Amer_v4 and the battery was excellent) but can still manage to last a full day usually. haven't tried out the froyo roms though.
ryanrich said:
Yup, that ROM has the best battery life by far...
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
btw aren't you're using opendesire?

I've changed about 8 roms, mostly used 4, but can't say there was a huge difference between them. 2 days of normal use, 1 day of heavy use.
Possibly shadowfrost and DeFrost 2.4 had the best battery life and I had the fastest kernel installed...
I would think that - some isolated problem aside - mostly it has to do with some applications/settings

Charge to 100% , go to recovery , advanced , wipe battery stats. Enjoy greater baterry life
Sent from my HTC Desire using Tapatalk
Click to expand...
Click to collapse
Any ideea why?
Sent from my HTC Desire using XDA App

andycted said:
I've changed about 8 roms, mostly used 4, but can't say there was a huge difference between them. 2 days of normal use, 1 day of heavy use.
Possibly shadowfrost and DeFrost 2.4 had the best battery life and I had the fastest kernel installed...
I would think that - some isolated problem aside - mostly it has to do with some applications/settings
Click to expand...
Click to collapse
sometimes my E-Mail application is consuming most of the cpu. It keeps the cpu at max frequency. Even if i try to end the taks with the app "system panel" it wont solve the problem. I have to go into the app and make a manual sync.
i also found out that automatic brightness is using loads of battery. since i set it to static I'm experiencing almost 2 days of battery life with moderate use.
I'm on Defrost 2.1

Hello again everybody,
Yesterday whole day online by WiFi. Using phone couple of hours and my Maildroid Email was active without prevent sleep mode.
Battery was empty after almost 17hours. (+/- 5% every hour)
Today. Wifi on. Maildroid now with prevent sleep mode ON.
Have unplugged the phone 4 hours ago and battery is at 75%
Tomorrow i will test this with Network Data on.. and without prevent sleep mode of Maildroid. And day after with prevent sleep mode.
I know for sure.. the battery will drain very vast for both situations...
BUT Ill let you know
EDIT 26-07-2010: Battery was empty tonight on 1:30.
NOW I do the whole test again but now with network data on and WiFi off

Ive had the opportunity to own a Nexus One at launch and a HTC Desire...I always found Android OS to be the issue whenever i had excessive battery drain.
Ive found my issue to center around the OS 'calling home to sync' (whether 'sync' option is selected or not)Initially, the problem was resolved by deleting all my sync funtions...but that was obviously not practical........ so now I keep my GSM data connection running and I get about 2.5 days on Open Desire (non HTC Sense).
AdamG seems like the guy who knows what hes talking about - His changelogs for OpenDesire actually hint at him having done some battery drain tweaking...whatever he did, he has definitely fixed it
Cheers
Oz

I've tried so many ROMS in the past few weeks to try to solve battery drain issues. On some, I could almost see the percentage dropping as I looked at the home screen! I even bought a new battery thinking I might have killed the original.
OpenDesire does seem to be the way forward re this problem if you're intent on the HAVS kernel. OD2.3a gave me almost two days of varied use.
However, and I know this is going backwards, an earlier DeFrost - the 2.1, is brilliant for me. I'm now at two days since unplug and still at an unbelievable 45% - yes, I know, I thought it was broke as well! For now, I'm sticking with this one. Everything I want works and I don't have to carry a spare battery in my pocket when I go out.
Hope this is of some help. Don't despair. You will find the one for you.
Cheers

I don't get why everyone says they have such a issue with battery.
I get about 2.5-4 days of use with DeFrost 2.2 and have done about so since DeFrost 0.9. I've had it up around five days once.
How are you actually using your phones?
It's not a "Froyo" issue.

sckc23 said:
people are having mixed results on the battery perfermance of adam's sensefroyo rom. i experienced a poorer battery life compared to eclair (i used Amer_v4 and the battery was excellent) but can still manage to last a full day usually. haven't tried out the froyo roms though.
btw aren't you're using opendesire?
Click to expand...
Click to collapse
Switched back because I had terrible battery life on OD 2.3a and couldn't see why...
Sent from my HTC Desire using XDA App

Daelyn said:
I don't get why everyone says they have such a issue with battery.
I get about 2.5-4 days of use with DeFrost 2.2 and have done about so since DeFrost 0.9. I've had it up around five days once.
How are you actually using your phones?
It's not a "Froyo" issue.
Click to expand...
Click to collapse
It's very interesting to me how are YOU using your phone?
Come on, 4 days ? When i talk about 30m to 1h each day and using a phone little bit, i have at least 30-40% down.
u mean u only drain about 25% each day? are u actually using your phone ? wifi, calls, 3g ? or u have a expensive pocket toy just to show to your friends ?

Best ROM for battery?

What is the best ROM for battery usuage?

Every sense with leedroid kernel...
Sent from my Desire HD using Tapatalk

i use revolution hd 3.1 and its great for performance and battery

I will second that Revolution HD 3.1 makes such a difference to battery life, its much smoother than stock too. Tried CM7 and CoreDroid but they were both a little too battery hungry to be useful.

ROM, Kernel and Radio
I have used LeeDroid HD, Spike CM7 and Android Revolution HD. All with different kernels and radios.
I would think the battery drain has to do with both ROM, Kernel and Radio versions (and maybe more). So it's vital that all the components is compatible. Most ROM devs recommend both a radio and a kernel.
And of cause it depends on all the services and app installed after the flash
Anyway, to you question:
I use the new Spike CM7 build 19 and have great battery life now.
I had problems with no sleep mode on other ROM/Kernel before. (and yes I have tried various patches)

I'm using CM7 latest nightly with mad murdocks battery fix and the the most latest radio and I'm getting 3-5 mA battery drain while in standby (with constant 3g, mobile data and sync on). So I'd say all the roms are quite close to each other when it comes to battery drain nowadays and the battery drain isn't a main concern anymore while choosing between roms.

My friend and myself bought the phones on same day. He runs Revolution and I run LeeDroid. Looks like there is a small advantage with LeeDroid.

i'm using Spike CM7 build 19 flashed with mad-murdock's batfix build7 and my battery life is great

I recommend Android Revolution HD 3.2 for you!
I had 2-3 days of battery with ARHD3.1 all the time!

matt_pan said:
I recommend Android Revolution HD 3.2 for you!
I had 2-3 days of battery with ARHD3.1 all the time!
Click to expand...
Click to collapse
Not using the phone much huh?!

Vispe85 said:
Not using the phone much huh?!
Click to expand...
Click to collapse
Yes and No
I don't know what would be much...
But with texting all day, some calls I get this, but yeah, I immediatelly turn off the display after using my phone and have deactivated all unnessesary stuff
I also removed most of the sense stuff and don't use twitter or something
the only syncing things are mail (every hour) and google (once a day)
but yeah, 1-2 days are easy with this, but mostely 2+

matt_pan said:
Yes and No
I don't know what would be much...
But with texting all day, some calls I get this, but yeah, I immediatelly turn off the display after using my phone and have deactivated all unnessesary stuff
I also removed most of the sense stuff and don't use twitter or something
the only syncing things are mail (every hour) and google (once a day)
but yeah, 1-2 days are easy with this, but mostely 2+
Click to expand...
Click to collapse
I'm not saying that it isn't possible as you can get a week out of the device if you just let it run on standby but as soon as you switch the screen on the consumption jumps to at least around 200mA and add a little gaming, browsing etc the consumption doubles from that (not an exact figure). So what I am saying is that it's kind of false to imply that another rom has way better battery consumption if you really don't use it that much. As it has been implied in many other threads that you just can't get over a day out of the device if you actively use it. It's just maths and there is no way around it as 1230mAhs will only get you that far
It is possible to get a few days by using it as a "regular" phone, it is all really usage dependent, and therefore the times are pretty hard to compare.

I am seeing a battery improvement using Coredroid V4 over Coredroid V3.2.
Today I have given the phone light use, about 4 short phone calls, email browsing, some facebook browsing but no gaming and I am at 73% after 12 hrs from full charge.

Combination of Buzz 1.3.8.2. 1.61GHz kernel, ARHD 3.2 with sense and the recommended radio is working great for me battery- and performance-wize. Using On demand gov at 1.22 GHz with 230-460MHz screen off profile.

Vispe85 said:
I'm not saying that it isn't possible as you can get a week out of the device if you just let it run on standby but as soon as you switch the screen on the consumption jumps to at least around 200mA and add a little gaming, browsing etc the consumption doubles from that (not an exact figure). So what I am saying is that it's kind of false to imply that another rom has way better battery consumption if you really don't use it that much. As it has been implied in many other threads that you just can't get over a day out of the device if you actively use it. It's just maths and there is no way around it as 1230mAhs will only get you that far
It is possible to get a few days by using it as a "regular" phone, it is all really usage dependent, and therefore the times are pretty hard to compare.
Click to expand...
Click to collapse
I did'nt say that it all depends on the ROM I use, but with my normal mobile phone lifestyle and this ROM I get those battery lifetime. It was ment as an example, because on the other hand, if I use my DHD more frequent with playing games and stuff, I don't get around the 24h with a single battery charge, but that's (like you say) ROM independet because of the big display consumption and the 1230mA battery.
I just wanted to state the ROM I use with my normal battery experience for the thread author to test out.
It all depends on the user

Vispe85 said:
Not using the phone much huh?!
Click to expand...
Click to collapse
I can easily reach this with stock rom...
Syncing every hour, sometimes tweeting, txting, and sometimes looking in market, just normal use.

Best ROM for battery life

What ROM's are you using and what do you think has the best battery life? I love my DHD but my biggest pain with it is it's battery life, I would love to get around 15 hours of moderate-heavy use out of it, but right now I only get between 8-10 hours of it, I've tried LeeDroid, Revolution and CyanogenMod. Which custom rom do you think is best for battery life?

in my humble opinion i would say CM7... thats after a fresh flash, battery calibration, and one full charge till total discharge (sometimes i like to do it two times just to make sure the bat stats get proper readings)... Maybe its just me but i usuall get around 15-18 hours depending... I would say that i am a medium to heavy user...mainly surf the web, movies, mp3s, text, light emails and of course downloading new roms and themes to flash...
Other than cm7 i find that RCMix and revolution to be pretty decent on battery life
U can always use currency widget to determin power loss and check whats soaking up your power
I'm no expert but so far this has worked for me

i've flashed a few roms over the last few weeks and i must say that they are all pretty decent in terms of battery life. i haven't really noticed one being significantly better than the next.
i can easily kill my phone within 7-8 hours with heavy usage but i can also keep my phone going for about 30 hours with light usage and about 16 hours with moderate usage, using the same rom.
if you asked me, i think it just depends on your style of usage. perhaps this isn't the answer you're looking for but i really don't think there's one rom out there that is going to give you that edge.

If you are looking for battery, use MIUI Freshly squeezed versions...CM7 was my first ROM, I loved it but battery life was terrible.. I could hardly squeeze out 12-13 hours even on low usage..MIUI is great! I easily get 15-20 hrs plus battery on moderate usage(wifi connected most of the time, abt 30 min gaming etc)..I bet if u try u'll see the difference.....

thanks for the replies, I think you're right with how you use it. Going to try MIUI now as well

aradhyat said:
If you are looking for battery, use MIUI Freshly squeezed versions
Click to expand...
Click to collapse
+1
but i use leedroid_hd_GB_3.0.1

Leedroid's roms always have very good battery life

Also bare in mind the radio you use has a big affect. I used the stock radio from December with Android Revolution when I first flashed it and my battery drain was extremely bad, about 15% an hour. Flashed some new radios and I get at least 18 hours before I hit 30%.

Yup radio plays a very important role.I tried 6-7 different radios before I found the right one.....

tuckerson said:
thanks for the replies, I think you're right with how you use it. Going to try MIUI now as well
Click to expand...
Click to collapse
If it is not important for you to lose HTC sense, MIUI is nice in spite of the fact that it looks like too much the firmware of the iphone
CM 7.0.0 HAS a bad battery drain but its fixed in the cyanogenmod 7.0.2... now the battery works for a long time.. 24 30 hrs moderate use..
and finally if you are interested for a better battery drain try SETCPU.apk (free for XDA MEMBERS) AND configure your proccessor for a conservative work or setdown de cpu (900 mhz for example)
under my experience with the custom roms leedroid (lastest froyo 2.2.1 with leedroid kernel 2.2.9 at 960 mhz max) was provided the best battery drain

Yup MIUI does look like iOS...That was one of the reason I didn't pay much attention to it at first.
You can always use a good launcher like ADW or Launcher Pro to replace the iOS feel...I personally am a fan of Go Launcher EX...its simple n fast n serves my purpose

aradhyat said:
Yup MIUI does look like iOS...That was one of the reason I didn't pay much attention to it at first.
You can always use a good launcher like ADW or Launcher Pro to replace the iOS feel...I personally am a fan of Go Launcher EX...its simple n fast n serves my purpose
Click to expand...
Click to collapse
ouu!good idea!!! i like miui´s performance but i don´t like his app drawer hahah

Newest Android Revolution HD + matching radio.img and MDJ's kernel v8 and good SetCPU settings makes for a REALLY fast DHD ( 1.6GHz ) and great battery life, a full day with medium to heavy usage from what I've experienced so far.

Used MIUI for the last day, really impressed, except for the iPhoneish feel as been said above. Going to try the setcpu too so I can underclock
I'm using the recommended radio too, which I always make sure I do, I rely on that for improved signal as well, the reception around my place is quite dodgy. Vodafone is Australia's equivalent of AT&T in America in terms of dodgy reception ha

My DHD is now running CyanogenMod7 2.3.5 Nightly and it drains about 1% every two hours idle. I think that's good.
Can anyone make a comparison table?

ARHD 5.2.3............almost 36 hours with regular use here.............24 hours atleast..................

rohithksaj said:
ARHD 5.2.3............almost 36 hours with regular use here.............24 hours atleast..................
Click to expand...
Click to collapse
Same here, although needs quicker recharging when using WiFi intensely (after about 12 hours in my case.)

as i think android rev. 5.2.x ,, the greatest bettary life for me

and also i think in general sense 3 roms are very bad in bettary life

Dark Helmet said:
Same here, although needs quicker recharging when using WiFi intensely (after about 12 hours in my case.)
Click to expand...
Click to collapse
i used to get 24hours even using wifi for ARHD 5.2.3+sense 3 components.....
but now i a using some extras other than sense 3[like transparent rosie,clock....so oon]
now my battery drains fast when using wifi...like you...............................

[Q] Cyanogenmod 10 battery life on normal usage.

Hi guys,
I recently switched to CM 10 (Android 4.1.2) and the battery life is significantly lower than what I had on the stock ROM and the new Sense UI... I guess.
My phone won't run longer than 10-15 hours a day with normal usage, which means Wi-fi and 3G always on, screen on automatic brightness being used for about 1 hour in total (for one charge). However Android OS, Cell Standby and Phone Idle still account for the most battery usage, which I find weird. I have no wakelocks and my device goes to deep sleep when not used.
Is this normal behavior with the new Cyanogenmod and Jellybean or are my expectations too high? I already read most threads concerning battery life, but most of them discuss problems such as wakelocks or similar issues. My question relates to the normal behavior of CM 10.
I am grateful for all replies on the matter or personal experiences.

It's known that CM10 battery life is worse than stock JB. You can try different kernels and different governors, but it's a trade-off between life and performance.

BenPope said:
It's known that CM10 battery life is worse than stock JB. You can try different kernels and different governors, but it's a trade-off between life and performance.
Click to expand...
Click to collapse
I don't understand, I thought that CM is stripped out of unnecessary background processes and apps. As long as I'm not using any CPU or GPU intensive apps like games it should consume less battery than the stock ROM. Is there something I'm missing?

Maybe the updated kernel and drivers give better power effeciency. When the JB kernel source is released, hopefully CM10 and other AOSP ROMs will also improve.

You were saying about on screen time?
Sent from my faster than SGS3 HOX.

CM 10 really uses a lot of battery but of you could switch off wifi and 3g when not using, and clearing all the apps frequently in the recent menu may help... My battery then lasts from about the start of the day till night though the batterys now quite old.
Sent from my NexusHD2 using xda premium

i got a weird battery life yesterday, i was walking from work to home, i started watching videos on youtube, looked at the battery, 31%, after few videos looked again, still 31%, i walked 41 mins with a total of 9% of battery drain, i also played a game for about 25 mins, it was a really battery life.

BenPope said:
Maybe the updated kernel and drivers give better power effeciency. When the JB kernel source is released, hopefully CM10 and other AOSP ROMs will also improve.
Click to expand...
Click to collapse
Allright... just gonna have to play the waiting game.
XxVcVxX said:
You were saying about on screen time?
Sent from my faster than SGS3 HOX.
Click to expand...
Click to collapse
That... is not possible! How the hell did you achieve that?
Mansehej said:
CM 10 really uses a lot of battery but of you could switch off wifi and 3g when not using, and clearing all the apps frequently in the recent menu may help... My battery then lasts from about the start of the day till night though the batterys now quite old.
Sent from my NexusHD2 using xda premium
Click to expand...
Click to collapse
That's pretty much my battery life as well. Regarding age, I'm really concerned, as I'm not able to open the phone and just replace it. But I guess that much better smartphones will come along before I consider getting a new battery and it won't be worth it any more.
hopeless12 said:
i got a weird battery life yesterday, i was walking from work to home, i started watching videos on youtube, looked at the battery, 31%, after few videos looked again, still 31%, i walked 41 mins with a total of 9% of battery drain, i also played a game for about 25 mins, it was a really battery life.
Click to expand...
Click to collapse
I get that sometimes as well. I pick up the phone a couple of times and the battery is always at, say, 50%. Then, a couple of hours later I read a message and it suddenly jumps to 41 or lower. But from what I've read that's normal and no cause of concern.

XxVcVxX said:
You were saying about on screen time?
Sent from my faster than SGS3 HOX.
Click to expand...
Click to collapse
I heard what causes the CM10 to have such an awful battery life is something that was supposed to save power when you lock your phone [Which is normally quiet often] and actually causes it to depelt, so it obvoiusly doesn't affect screen time
CM10 is a horrible ROM, get something else... I used LiquidSmooth for a while, it's a great ROM
Now running ParanoidAndroid 2.53
Btw, Stock ROM had a wonderful battery life, I only realize that now ... lots of ROMs can't reach that much

SrebX said:
I heard what causes the CM10 to have such an awful battery life is something that was supposed to save power when you lock your phone [Which is normally quiet often] and actually causes it to depelt, so it obvoiusly doesn't affect screen time
CM10 is a horrible ROM, get something else... I used LiquidSmooth for a while, it's a great ROM
Now running ParanoidAndroid 2.53
Btw, Stock ROM had a wonderful battery life, I only realize that now ... lots of ROMs can't reach that much
Click to expand...
Click to collapse
That's exactly what I did, flashed the old RUU and installed all updates. I don't know how the guys from HTC managed to do it, but the battery life on Android 4.1.1 and Sense 4+ is AMAZING. I easily get 24 hours with normal usage, over 2 days if I'm really careful.

This is what I got during a night sleep with cm 10.
I installed it yesterday so its kinda new tot me. What causes this?
Sent from my HTC One X using xda app-developers app

Probably some nasty wakelocks. Install with wipe/factory reset if you didn't so already. Then try betterbatterystats (search xda) to find out what is causing wakelocks.

Stock ROM has better battery life than AOSP and other ROMs

I've been migrating from many ROMs and I noticed that stock Sony ROM has a significantly better battery. Even though stock Sony has a lot of bloatware it performs better but AOSP ROMs are a lot smoother. I heavily use my phone with the screen on more than three hours and WiFi on.Has anyone other than me noticed that? Or is it just me.

lewis021 said:
I've been migrating from many ROMs and I noticed that stock Sony ROM has a significantly better battery. Even though stock Sony has a lot of bloatware it performs better but AOSP ROMs are a lot smoother. I heavily use my phone with the screen on more than three hours and WiFi on.Has anyone other than me noticed that? Or is it just me.
Click to expand...
Click to collapse
yup me too, all jb 4.2.2 ROMS including CM builds and AOSP seem to drain a lot faster even on idle conditions. But i found paranoid android 2.57 jb 4.1.2 far better as far as battery is concerned and maybe better than stock and at the same time fluid and smooth.

lewis021 said:
I've been migrating from many ROMs and I noticed that stock Sony ROM has a significantly better battery. Even though stock Sony has a lot of bloatware it performs better but AOSP ROMs are a lot smoother. I heavily use my phone with the screen on more than three hours and WiFi on.Has anyone other than me noticed that? Or is it just me.
Click to expand...
Click to collapse
I have xperia ion LT28at (at&t unlocked). I made the phone rooted and deleted some bloatwares with Link2SD software. There are many bloatwares like At&t related ones. Today I am trying the phone with full battery .
see the pic.

This is the minimal use of my phone after deleting bloatwares in stock rom. It is around 13,5 hours. Brightness was %15~20.
Here is the picture.
So,
How can I extend the battery life?
Sent from my LT28at using Tapatalk 2

zedonetx said:
This is the minimal use of my phone after deleting bloatwares in stock rom. It is around 13,5 hours. Brightness was %15~20.
Here is the picture.
So,
How can I extend the battery life?
Sent from my LT28at using Tapatalk 2
Click to expand...
Click to collapse
What was the screen display time during this battery period?

auni said:
What was the screen display time during this battery period?
Click to expand...
Click to collapse
it wasnt much. i mostly kept the phone screen off to determine the battery life of this new phone. I bought this phone 2 weeks ago. and still same low battery life.

zedonetx said:
it wasnt much. i mostly kept the phone screen off to determine the battery life of this new phone. I bought this phone 2 weeks ago. and still same low battery life.
Click to expand...
Click to collapse
If you press "screen" in that battery stats menu you've just shown us, you can see the time that screen was on. That was what we'd like to see to determine if you battery life is abnormal compared to others. What you're showing doesn't tell us a lot. 13 hours is not much, but everyone has a different idea of what "not using the phone much" is.
What would your guess be for screen time, 2 hours, 3 hours?
Anyway, 13 hours is not much, your phone should be able to do much better if you didn't play any games. It really depends in Android what apps you have installed, because some bad apps drain battery in the background.

zedonetx said:
it wasnt much. i mostly kept the phone screen off to determine the battery life of this new phone. I bought this phone 2 weeks ago. and still same low battery life.
Click to expand...
Click to collapse
Give couple of more weeks to the phone. Charge more. Usually all the Xperia gives better result after few full charge cycles. And battery life varies actually.
Read the Battery life Thread available in General Section. You should find several tweaks and tips from the other users.

I have the same problem, on stock rom i had something like 0,5% battery drain per hour, on AOSP/ Jelly Bean roms i have 2~4% per hour...

I had 50% of battery at the end of the day. I just used my phone for SMS and calls, no wifi no mobile data 30% screen brightness and on 2G .
Sent from my LT26w using xda premium

lewis021 said:
I had 50% of battery at the end of the day. I just used my phone for SMS and calls, no wifi no mobile data 30% screen brightness and on 2G .
Sent from my LT26w using xda premium
Click to expand...
Click to collapse
Exactly...if i use 3g....my battery drains alot...2g saves battery
Sent from my LT28i using xda app-developers app