Database Info

Tips to GREAT Battery Life!

Here are the settings I'm running on CM7 to get amazingly bananas battery life (with the display being on for about 5 hours!)..
1. Conservative governor: 245mhz - 1017mhz in CM7 settings
2. Install the 'BatteryCalibration' app from the market. This app caused the single biggest improvement for me after having flashed so many roms and never calibrating the battery. If you've calibrated it before though, I don't think it'll be very useful for you.
3. Install 'NoBars' from the market to automatically turn on airplane mode when you have no service. (This might be useless to some of you if you always have a signal; Very useful in NYC subway though)
4. Use a 2G toggle widget to have the phone only use the Edge connection when you only need it to receive calls/ texts and don't need the high speeds. I use the toggle widget in the CM7 notification bar. HUGE battery saver.
Give these a shot and let us know how they work for you

I've reached the end of my day and here are my final stats..
Mmy display has been on on over 5 hours now and I have 5% of the battery left. Seems more than good enough for me. Hopefully it will be for some of you too
Edit - Updated with more recent stats

Aspeds2989 said:
As you can see by my display being on over 3 hours, I used my phone a heck of a lot today and still have over a third of my battery left. Seems more than good enough for me. Hopefully it will be for some of you too
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Click to collapse
Question: It's cool that your display was on for 3 hours, but what did you do as far as app usage??
If you did use your phone "a heck of a lot" wouldn't some apps like "internet" "maps" or something show up on the battery use %'s???
For example, currently, other than phone idle, cell standby, voice calls and android, there's also internet, mail, maps, and other apps that I used today alot.

Good observation. I have no idea how android chooses which apps to show on there, but I think it depends on the ROM? I remember on Iced Glacier cell standby would barely use 5% of the battery and on CM7 it uses >40% consistently. Idk.
Maybe what those apps used up here was nothing compared to the display, wifi and phone idle time.. Just a guess.. But I did use the browser and xda app and listened to music via the Rdio app running in the background several times throughout the day, and sent multiple texts and have had my wifi on for about 5 hours now. I can't really find a menu that would show these statistics except in the Spare Parts app, and here you go..

I got 17 hours just yesterday with 9% left with moderate to heavy use (texting, web browsing and ps1 emulation).
I didn't do anything besides use faux's kernel with the smartass govenor. I have the max speed overclocked to 1.8 as well...

Nice. I just got over flashing new kernels for a while since the stock CM7 one has everything functioning perfectly and new kernels would improve on something but mess up something else in my experience.

I can't seem to find a 2g toggle widget that works with Royal Glacier. (one touch, I've found a few that take you to settings) When I was running Royal Ginger I would always use the one that came in the notification bar.

Wifi status is also a good app to remind the forgetful to turn off wifi when they leave the Area.

Aspeds2989 said:
I've reached the end of my day and here are my final stats..
Mmy display has been on on over 5 hours now and I have 5% of the battery left. Seems more than good enough for me. Hopefully it will be for some of you too
Edit - Updated with more recent stats
Click to expand...
Click to collapse
This is GREAT battery life... i wonder what word i'd use to describe mine.
i Pulled my Phone off the Charger this morning @ 7:20pm EST. Now it is 3:13 EST. and i've got ~50% left. So thats what like. 7 hours

neidlinger tap that 'screen on' tab and lets see how long your screen was actually on for?
Either way congrats, and it's good to see ppl are over the battery issues.

Aspeds2989 said:
neidlinger tap that 'screen on' tab and lets see how long your screen was actually on for?
Either way congrats, and it's good to see ppl are over the battery issues.
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Click to collapse
since my last boot. 8:10AM when i loaded the new CM7. 1h 1m 59s.

Unless I'm missing something, the 'BatteryCalibration' app won't increase your battery life. It will just help to get a more accurate reading of your battery level.
I've played around with different roms and kernels. And yes, they do have a small effect on battery life, but not all that much.
Here's my tip for battery life. Get on ebay and buy one the of the cheap packages from Hong Kong with 3 batteries and a standalone charger. Like this:
http://cgi.ebay.com/3x-New-1500mAh-Battery-Charger-HTC-Mytouch-4G-Merge-/290556738794?pt=PDA_Accessories&hash=item43a687fcea
I bought a similar package a few months ago and now I never have battery problems. Nor do I have to take a chance on wearing out my micro-usb jack like I've seen happen on a lot of other phones.

Maybe. All I know is my battery increased dramatically after running that app once.
I measure battery life by how many hours I am able to keep my display on before it dies rather than how long after it comes off the charger (like nedilinger does). My battery used to die after about 3 hours of the display being on. Now it consistently lasts 5 hours.
Anyway, I was just trying to let others know what I did to get a really good battery life on my phone thinking it might be helpful. Apparently that's not appreciated. Thanks tho.

sundayhustler said:
Unless I'm missing something, the 'BatteryCalibration' app won't increase your battery life. It will just help to get a more accurate reading of your battery level.
I've played around with different roms and kernels. And yes, they do have a small effect on battery life, but not all that much.
Here's my tip for battery life. Get on ebay and buy one the of the cheap packages from Hong Kong with 3 batteries and a standalone charger. Like this:
http://cgi.ebay.com/3x-New-1500mAh-...738794?pt=PDA_Accessories&hash=item43a687fcea
I bought a similar package a few months ago and now I never have battery problems. Nor do I have to take a chance on wearing out my micro-usb jack like I've seen happen on a lot of other phones.
Click to expand...
Click to collapse
How long does 1 of those batteries last?
Sent from my HTC Glacier using XDA App

simple way to get awesome battery life without any extra steps is to install RoyalGlacier 1.6, that's all. A couple days ago I ran my phone for one and a half days before charging it again, and it still had 14% battery left. RG is pretty much a polished version of CM7, runs blazing fast and smooth.

erickdj said:
simple way to get awesome battery life without any extra steps is to install RoyalGlacier 1.6, that's all. A couple days ago I ran my phone for one and a half days before charging it again, and it still had 14% battery left. RG is pretty much a polished version of CM7, runs blazing fast and smooth.
Click to expand...
Click to collapse
does the royal ginger gets the same battery result?

iambryantho said:
does the royal ginger gets the same battery result?
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Click to collapse
Better than what's reported under CM7. The battery life I posted above was on RG.

you say you don't sacrifice 4g but you admit you have a 2g/edge widget?
To me "not sacrificing 4g" means not ever turning it off, maybe i'm mistaken
I had battery issues, I'd have to charge it mid day else it would die. Juicedefender helped a bit (claimed to do 1.7x battery life) but I uninstalled it, rooted the phone, and uninstalled a bunch of stock apps
For some reason now my battery lasts a very very long time, don't know how or why that is. I also admit I don't use it as heavily as some people, but my habits have not changed and I did have to charge it mid day (like i said) even with little usage

rosebud1 said:
How long does 1 of those batteries last?
Click to expand...
Click to collapse
Obviously, it's hard to say without describing how I use my phone, but I get probably 10-15 hours of medium-high usage. I probably get about 4-5 hours of talk time. I'd say the Chinese ebay batteries probably last 80-90% as long as the OEM battery. Quite decent considering the price.

My earlier thoughts about the BatteryCalibration app could be wrong. I don't really know all the details about how Android battery calibration works. I just assumed that it simply learns about all the bad spots in your battery so that your phone doesn't instantly jump from 80% to 30%. I also assumed that the phone would die when the battery had no power left, as opposed to when it says 0%, but maybe that's not the case. Regardless, if it helps you, more power to you and I appreciate you sharing the app. I didn't mean to come off as an unappreciative ****. If I did, sorry bout that.

CM7 battery life Troubleshooting thread

I am loving this rom, but also having HORRID battery life, I am literally dropping 10% every 90 minutes with an extended battery.
27% Cell Standbye
26% Bluetooth
19% Display
Now I keep reading that these might be false readings, but I keep reading this as a response to those having **** for battery life... so maybe they are not false?
Anyone having good battery life show readings like this? Those with bad battery life, what are your readings?

I'm running the CM7 w/the 2.5 radio - I'm in a 100% full time 4G area, but seem to have worse battery life when the 4G radio is on, so I just keep the phone on 3G - if I need the faster data I can always turn it on and off.
I'm running the stock kernal, no overclocking or setcpu type stuff going on.
Would like to hear from folks running this ROM w/killer battery life, what are your settings, tweaks, etc. Please specify if you're running an MR1 or Mr2/2.5 version and/or running the latest OTA 2 radio that just came out like yesterday.
I just turned off my FB sync (I forgot about that). I don't have gmail set up to sync automatically either.
I'm going to do this procedure a little later today and see if it helps, this is for the EVO, but, ya know....
34. "Calibrate" battery - (1) Turn device ON, charge it for 8 hours (or until LED turns green), (2) unplug and turn it OFF, plug it back in and charge for 1 hour (or until LED turns green), (3) unplug and turn it ON, wait 2 minutes, turn it OFF, plug it back in, and charge for 1 hour (or until LED turns green), (4) unplug it, turn it ON, and use normally.
Anybody else try this?
today will be my first full day of work use w/this ROM so we'll see what happens.

Best to keep 4g off if not using it. Also, turn Bluetooth off when not in use.
Sent from my ThunderBolt using Tapatalk

i had horrible battery life the first day - then it got better. then i flashed mr2 official and battery life is really solid. getting like 15-20 hrs with 4g always on, bluetooth on sometimes. one important thing is having a custom lighting table which i will post later.

Bassdj427 said:
Best to keep 4g off if not using it. Also, turn Bluetooth off when not in use.
Sent from my ThunderBolt using Tapatalk
Click to expand...
Click to collapse
I have never, nor do I intend to ever do this. I got an extended battery for a reason. I can go all day and then some on the official roms, and all of the Sense roms.
I am not new to CM7, I have run it on both an Eris, and an Incredible. Both devices got FAR better battery life on CM7.
I am not complaining about this rom, or Slayhers hard work. I simply want to gather information so that we may help him trouble shoot.

Immediate wiper batt stats at 100% this morning on my extended batter will report back with usage and level details
Sent from my ThunderBolt using XDA App

stayin100 said:
Immediate wiper batt stats at 100% this morning on my extended batter will report back with usage and level details
Sent from my ThunderBolt using XDA App
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Click to collapse
This is exactly what I did lol, I had lost 10% in the first 90 minutes, now I am at 58% at 5 hours. I have been streaming google music for 2 hours of that 5 though. I would guess I should have seen an increase in battery usage, but have not.

The battery readings are wrong, I get a full day on 4G with my stock battery and see those numbers for cell standby etc. I use lean kernel though
Sent from my ThunderBolt using XDA Premium App

do you see those numbers for BLUE TOOTH though? We know good and well some numbers are fake, but that does not mean all.
FYI I am now at 37% and 7 hours and 7 minutes... I have not used google music since the last post and I am seeing the exact same battery drain as when I was using it.

I have absolutely horrible battery life when I'm at work (which is basically a bunker). On a normal day, my battery will be dead within 6 hours just sitting there on my desk.
However, when I am at home (great 4G signal), I see my device getting upwards of 16 hours with moderate use.
I will also say that since I upgraded to the most recent radio, I have been having much better battery life at home. Additionally, my phone has stayed much cooler with the most recent RC + new radio combination.

I heard if you change the render fx to n1 calibrated, then you will get like 1 hour extra of battery life. You can change the render fx by going to cyanogenmod settings.

11h32m11s on extended battery 69% left
The other numbers have to be wrong. Theres no way cell standby is the number one battery user.

my cell standby is also showing 30% with the new OTA 2 radio.

I switched to dream kernel (have not wiped battery stats) and am now at 88% after two hours, that puts me at 6% per hour verses yesterdays 10.

_Viper_ said:
I heard if you change the render fx to n1 calibrated, then you will get like 1 hour extra of battery life. You can change the render fx by going to cyanogenmod settings.
Click to expand...
Click to collapse
only works for AMOLED screens.
edit: to be clear, it only saves battery on AMOLED.

so what i have found is that after installing dream kernel and messing with the governor settings... along with being connected to wifi. my battery life has improved tremendously. i wiped battery stats this morning after a full charge and didnt notice any change.. then i flashed the kernel and messed with gov. settings... after rebooting ive noticed a huge huge difference.. just my 2 cents for anyone who had battery issues like me

Yesterday I was able to choke out 20 hours while in a 4G area the entire time.
Running RC 1.2, Imoseyon's leanKernel extreme mode (extremely undervolted and OCd to 1.4GHz) and using the InteractiveX governor.
Also, I just happened to reboot and surprisingly it only took away 1% of my battery. Amazing considering whenever I did that on a Sense ROM, I'd experience a battery loss ranging from 7%-10%.

beeholtz said:
so what i have found is that after installing dream kernel and messing with the governor settings... along with being connected to wifi. my battery life has improved tremendously. i wiped battery stats this morning after a full charge and didnt notice any change.. then i flashed the kernel and messed with gov. settings... after rebooting ive noticed a huge huge difference.. just my 2 cents for anyone who had battery issues like me
Click to expand...
Click to collapse
What settings did you land on as best?

cpu is set max to 368 mhz(very low) but i can crank it up if im doing somethign like playing games or downloading and want speed. brightness is at about 15-20 percent. the dream kernel and mr2.0 radio have made a big diff too. the dream kernel made the biggest. usually when id power off or reboot id lose 6-10 percent same as someone else i saw post. now i lose maybe 1 percent which is a huuuuge difference considering you lose 10 percent just because you reboot. also i try to stay on wifi wherever i go. on 3g i def notice it drain quicker, but i am no expert and there are a lot of people on here who by far outexperience and outknowledge me(my new 2 words) so im sure other people have some suggestions

Morkai Almandragon said:
I am loving this rom, but also having HORRID battery life, I am literally dropping 10% every 90 minutes with an extended battery.
27% Cell Standbye
26% Bluetooth
19% Display
Now I keep reading that these might be false readings, but I keep reading this as a response to those having **** for battery life... so maybe they are not false?
Anyone having good battery life show readings like this? Those with bad battery life, what are your readings?
Click to expand...
Click to collapse
That is strange I am also using CM7 with an extended battery and still have 41% left after 14:56 on battery.
battery use does show
cell standby 31%
phone idle 19%
android system 19%
wifi 11%
dialer 10%
display 6%
voice calls 3%

Are all Android phones this bad with battery life? *Update*

So here's a screen grab of my phone's battery. I work 9-5. Started the day with fully charged battery, and end of work day it's almost dead. Honestly, I never thought it would be this bad. I don't play games or watch endless videos on youtube. I've sent about 15 texts messages max, used the phone to make about 4 calls for a max talk time of 6min. And browsed the net for no longer than 5min. I have wifi always off, GPS off, my screen is always set right down to absolute minimum all the time. I have never used live wallpaper, and have a black wallpaper. All I've done to this phone is root it and remove a lot of bloatware. Nothing else. I've read through the forum and came upon this thread:
http://forum.xda-developers.com/showthread.php?t=1092249
So without running the Bali kernel or running any specific rom, Is this the expected battery life for the average person who just leaves the phone completely stock.
*UPDATE*
JuiceDefender works!!! Battery now last much longer. Thanks goes to jager555 for the great suggestion.

Most high end ones are. because android runs things in the background and allows you to customize many settings, Battery life usually looks like that when you first get your phone. That said once you get familiar with your phone you will start to recognize things that run in the background that serve you no purpose and you can stop them or get rid of that app. You can also get custom roms that have great modifications to enhance your battery's life. It takes some experimentation but gone are the days of getting 4 days out of you Razr. Try searching "battery saver" in the market, too.
It could look like this...

Well I have to say that's quite shocking. The average person just has no clue on how to flash roms or anything like it. They just charge their phone and go. It really makes me wonder why Google or the phone manufacturers wouldn't think battery life to be a priority. The battery life isn't just bad, its unacceptably bad.
Thanks for the input though.

Yeah no thats not normal. When i first got this phone i could go up to twelve hours non stop with regular use text here and make some phone calls, watch one or two videos... And i still had battery left probably like 40% maybe less. Well at least for me i dont know if i was a special case or not.
Sent from my SGH-T959V using XDA App

if you are on stock and do not use the bali kernel, get Juice Defender from the market. try it out for 2 days and get back to me on how it works. if you want the best battery life, especially since you take off gps and wifi, set it to aggressive. that should make the battery last MUCH longer with your type of usage. but once again, use it for 2-3 days for it to settle in properly

jager555 said:
if you are on stock and do not use the bali kernel, get Juice Defender from the market. try it out for 2 days and get back to me on how it works. if you want the best battery life, especially since you take off gps and wifi, set it to aggressive. that should make the battery last MUCH longer with your type of usage. but once again, use it for 2-3 days for it to settle in properly
Click to expand...
Click to collapse
Will do. You got my hopes up.

its usually the screens, emails, and txts that kill my battery lol

Tempott said:
Will do. You got my hopes up.
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Click to collapse
yea, my dad is on stock with this phone and it wouldnt last from 7am to 2pm. now it lasts from 7am to at least 8pm with the same type of usage. its a neat program. i hope it works well for you.

I'll second juice defender. Even the free beta version has helped my phone last a long time. but if you aren't using your phone much, you should really get a lot better battery life than that. if it's brand new, it can take the battery a couple of charges from a full drain to get up to snuff.
With light use, I can get well over 2 days, and have even gotten over 3. Here's a screenshot I took a couple of weeks ago.

mike-y was the one who introduced me to juice defender, btw. great find, man

Wow, Tempott, that's very short battery life. I actually had pretty decent battery life on stock. I lasted about 12 hours on moderate use. Then again, it's funny that I last 18 hours on very heavy use now with ICBINB with 4G on, first level brightness, and sync always on (no JuiceDefender, etc.).

i am using Audiophile ROM. i get 10-15h of battery life.

Im using black ice with bali 3.1uv dsexton's build.prop and im getting round 12-15 with heavy use(mobile AP, pandora, calls)
Sent from my SGH-T959V using XDA App

Did you try juice defender? if so, what were the results?
Sent from my SGH-T959V using XDA Premium App

jager555 said:
Did you try juice defender? if so, what were the results?
Sent from my SGH-T959V using XDA Premium App
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Click to collapse
Sorry for the late reply, but I just wanted to give the app a thorough usage. I'm happy to say it really makes a difference. I was so disappointed with the battery life that I had a serious bout of buyer's remorse. This App made a world of difference. Thanks for the suggestion! Glad to have this phone now. Check out the screen shot!

Nice!! that's great. I liked the beta app so much I went ahead and paid for the "plus" version. "Plus" gives JD control over wifi, and lets you set a "night mode" that turns off data/wifi/gps/bluetooth during the night when you sleep. There is also app control, which I played with, but ended up just disabling it (makes things a lot simpler).
Honestly, if the beta is working for you, there isn't much need for the paid versions. especially if you put your phone in airplane mode when you got to sleep (or just turn it off).
btw, current uptime = 40 hours, 45 mins, and I still have 70% battery left.

It seems to me Battery Calibration doesn't work...however, this phone lasts longer than the Sensation, which personally sucks.

battery calibration works fine. make sure your phone is charged to 100%. check spare parts amd make sure it is at 4200mV. sometimes, if it is not calibrated properly, it will show 100% and not 4200. unplug the phone and immediately plug it back in and you will notice a fluctuation in the numbers. usually, it is a big fluctuation. once you are as close to 4200 as you think you are going to get while the phone is plugged in, open the battery calibration app and click calibrate. then immediately unplug the phone. use it until it is completely dead (i do it until i shuts down). once this is done, charge the phone until it is 100%. do no unplug the phone until it is at 100%. then drain it again. and charge it to 100% again. after that, use it normally for 2 to 3 days and you will notice the difference in efficiency.

jager555 said:
battery calibration works fine. make sure your phone is charged to 100%. check spare parts amd make sure it is at 4200mV. sometimes, if it is not calibrated properly, it will show 100% and not 4200. unplug the phone and immediately plug it back in and you will notice a fluctuation in the numbers. usually, it is a big fluctuation. once you are as close to 4200 as you think you are going to get while the phone is plugged in, open the battery calibration app and click calibrate. then immediately unplug the phone. use it until it is completely dead (i do it until i shuts down). once this is done, charge the phone until it is 100%. do no unplug the phone until it is at 100%. then drain it again. and charge it to 100% again. after that, use it normally for 2 to 3 days and you will notice the difference in efficiency.
Click to expand...
Click to collapse
I would like to add that the first charge drains amazingly fast. You can be idling your phone the whole day, and it'll still be gone.
After you go through a few charges, it'll be omgwtfbbqhax battery life.
Btw, I'm betting Bali 3.3UV + JD is pretty beast battery life compared to Bali 3.3 + JD, right?

Juice defender works great for me as well! Very noticeable difference

Losing battery life while phone is idle

Hello everybody, I notice lately my phone is losing about 10 percent battery life every 2 hours while it is idle. The funny thing is I have data off no text message and made one phone call. I don’t know what’s going on. I am running stock.

The Newest apps I downloaded were comicbook reader, Spotify and Netflix, but that shouldn’t matter right? Because my mobile data is off

that sounds about average to me. since its stock, i would just put Juice Defender on it and leave it set to "balanced", then see where youre at battery wise.
additionally, you could try Watchdog to see if theres any background apps that are consuming a ton of cpu(it can happen)

voxigenboy said:
that sounds about average to me. since its stock, i would just put Juice Defender on it and leave it set to "balanced", then see where youre at battery wise.
additionally, you could try Watchdog to see if theres any background apps that are consuming a ton of cpu(it can happen)
Click to expand...
Click to collapse
Thanks alot man..will get those apps and report back in a few days

Funny thing is this seems like its just started out of nowhere. I had my phone since launch and never had this problem.

mbrown3460 said:
Funny thing is this seems like its just started out of nowhere. I had my phone since launch and never had this problem.
Click to expand...
Click to collapse
do you ever charge your phone in your car?
i know when you charge it via a wall charger or your PC, there's overcharge protection so realistically you can leave it "plugged in" as long as you'd like.
apparently though, if it gets fully charged and you still leave it plugged in in your car it can eventually do some damage to the battery and eventually kill it.
i had that happen to my old Galaxy S 4G & when i went to get a new battery they confirmed that that was the culprit.

You need to go into settings/ power/ and uncheck fast reboot . It runs all the time and eats up battery.
Sent from my Verizon 4GLTE HTC Thunderbolt

voxigenboy said:
do you ever charge your phone in your car?
i know when you charge it via a wall charger or your PC, there's overcharge protection so realistically you can leave it "plugged in" as long as you'd like.
apparently though, if it gets fully charged and you still leave it plugged in in your car it can eventually do some damage to the battery and eventually kill it.
i had that happen to my old Galaxy S 4G & when i went to get a new battery they confirmed that that was the culprit.
Click to expand...
Click to collapse
no only charge my phone on the wall or PC. Wow I didnt know I can leave my phone plugged I thought my battery would be damaged if I left it plugged in.
jbh00jh said:
You need to go into settings/ power/ and uncheck fast reboot . It runs all the time and eats up battery.
Sent from my Verizon 4GLTE HTC Thunderbolt
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Click to collapse
fast reboot is not checked in my settings.

phone idle isnt as important as the time it says it's without a signal. if you arent getting a signal, it's looking for one and really really draining the battery

yareally said:
phone idle isnt as important as the time it says it's without a signal. if you arent getting a signal, it's looking for one and really really draining the battery
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Click to collapse
Yep TWS is the biggest culprit of battery drainage on these Android phones. If you're in a poor reception area, you're SOL because the phone will eat through the battery searching for a signal. I have an Epic and have similar battery drain issues due to this.

yareally said:
phone idle isnt as important as the time it says it's without a signal. if you arent getting a signal, it's looking for one and really really draining the battery
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Click to collapse
hmmm you might be on to something. Don't get good reception at home and my reception is ok at work, not perfect tho.

mbrown3460 said:
Hello everybody, I notice lately my phone is losing about 10 percent battery life every 2 hours while it is idle. The funny thing is I have data off no text message and made one phone call. I dont know whats going on. I am running stock.
Click to expand...
Click to collapse
First, you should seriously consider rooting, then flash a custom rom & kernel. The stock rom is no battery sipper, and custom roms & kernels are much more efficient. I was getting ridiculous overnight drain (>20%) on stock, but now I'm getting only 1% per hour (6-8%). Also, grab Autostarts from the market. It prevents unnecessary apps from launching in the background & wasting battery (& memory)
Sent from my ADR6400L using XDA App

mbrown3460 said:
hmmm you might be on to something. Don't get good reception at home and my reception is ok at work, not perfect tho.
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Click to collapse
It'll show in the about stats when you press on the phone usage stats how long it was without a signal if you want to look (in case you weren't aware). Also I would make sure your phone is set to use wifi when sleeping always and not mobile (under wifi settings → press menu → go to advanced).

yareally said:
It'll show in the about stats when you press on the phone usage stats how long it was without a signal if you want to look (in case you weren't aware). Also I would make sure your phone is set to use wifi when sleeping always and not mobile (under wifi settings → press menu → go to advanced).
Click to expand...
Click to collapse
My mobile data off when I'm at work. So pulled my phone off at 6 am, made one call, checked my email and now I'm down to 93 percent. This is just ridiculous seems like my battery getting worst by the day.

I'm at home now on WiFi...my mobile data is usually off all day at work. Watch dog only alerted me to dolphin browser and I always close that out when I'm finished. I don't know what's going on.

Why do I need to baby sit my phone to get good battery life?

voxigenboy said:
do you ever charge your phone in your car?
i know when you charge it via a wall charger or your PC, there's overcharge protection so realistically you can leave it "plugged in" as long as you'd like.
apparently though, if it gets fully charged and you still leave it plugged in in your car it can eventually do some damage to the battery and eventually kill it.
Click to expand...
Click to collapse
This is not correct. The battery charge is controlled by the phone itself. the battery also has some electronics in it to limit the charge. The car charger provides 5 volts just like any USB port. You can (and I have) leave phone plugged into a car charger with no issues.
It is true that you should avoid charging the phone when it is HOT. So leaving it in a HOT car or any place HOT is a bad idea.

Checked the settings and my phone is using 3% battery life while it is idle. So I shouldn't be losing so much power. Is my battery damaged?

Yep, backing this guy up. The battery has it built in where it'll cut off the charge after it's full- and android has it that after it reaches 100% it'll let it drain down to ~90% because keeping it at 100% for extended periods of time is bad for the battery health.
For those more interested in your phone's battery and how charging works, check out this post:
http://forum.xda-developers.com/showthread.php?t=871051
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If you're losing battery life when you're idle you have a few main reasons.
- First check to make sure you have a low min. set for your CPU, you don't want to have your CPU rev'd all the way up all the time- it's just not good.
- Download "spare parts" and check under "battery history" and you'll be able to see if you have a lot of GPS usage, data usage, CPU usage, etc.
- I'm not sure if mobile data turns both 4G and 3G off. I know the 4G here totally demolishes the battery, even more if you don't have it in your area.
If you don't have 4G and would like to save your battery from a painful death, do this (easy to change back)
*#*#4636#*#* -- Go to "Phone Settings" >> change to "CDMA auto (PRL)"
This will turn off 4G and stop it from searching, while still allowing you to use 3G and not have to turn off all data.
Hope at least one of those points helped you out and hope you get some better life because that's pretty bad, shouldn't be normal.

mbrown3460 said:
Hello everybody, I notice lately my phone is losing about 10 percent battery life every 2 hours while it is idle. The funny thing is I have data off no text message and made one phone call. I don’t know what’s going on. I am running stock.
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Losing 5%/hour is normal for my phone when it's sitting doing nothing. The battery is a joke. I have Juice Defender Ultimate and that brings it down to maybe 2-3%/hour.

Battery life problems.

Hello, I'm currently running cm 9, however the battery life is just awful
When the phone is on sleep it loses like 1 percent every 5-10 minutes
I am using an extended battery as well, please tell me what to do I was on GB before and the battery was outstanding, I could go on one charge the whole day with heavy usage, now i dont think I can make it through the day with light usage on this
thank you
EDIT: This could be a sleep problem, because when the device is on, the battery is normal

If you flashed the Feb 27 cm9 you should flash proton kernel so you can watch videos. Battery life isn't as good as gb no matter what you do. Also give it some time to settle in. It takes more than a couple hours.

alright thank you... I just flashed the newest version of cm9 a few hours ago, I was flashing a bunch of roms and this one seemed the best... do you know how to force a device into deep sleep cause that seems to be the problem i believe

OK I was just on 20 percent, then i rebooted my phone, and now im on 2 percent... im seriously considering going back to gb

Sounds more like a battery thing? With CM9.? + Proton I'm getting at least a day* with light use. Maybe a bad app or combo of apps? What does BBS say is eating the charge?
* - I say at least a day because I can't not use it for that long.
Sent from my SGH-T959V using xda app-developers app

Stuck on hold said:
Sounds more like a battery thing? With CM9.? + Proton I'm getting at least a day* with light use. Maybe a bad app or combo of apps? What does BBS say is eating the charge?
* - I say at least a day because I can't not use it for that long.
Sent from my SGH-T959V using xda app-developers app
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just the screen and the android system... very interesting thing though is happening
I'm running a bunch of quadrants to get the battery down to 0, and the battery is all the way down to 1%, however it's been on 1% for like 6 quadrant tests... maybe its just a problem with the indicator, however another indicator also says it's at 1%... very interesting

If you are on CM9, I suggest you flash Hefe or Proton.
I use Hefe because according to the posts being made it puts your phone into deep sleep, which means longer battery life.

tstrat said:
OK I was just on 20 percent, then i rebooted my phone, and now im on 2 percent... im seriously considering going back to gb
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Definitely a battery problem. This happens to me on one of my batteries but not on another. Time to buy a new one. I haven't tested it fully but it does appear to be just a display issue. Sometimes the bad battery will make the phone display 1% but it will still act as if it had way more than 1% charge left. I haven't done any testing on that regard but that's what it appears to do.

FBis251 said:
Definitely a battery problem. This happens to me on one of my batteries but not on another. Time to buy a new one. I haven't tested it fully but it does appear to be just a display issue. Sometimes the bad battery will make the phone display 1% but it will still act as if it had way more than 1% charge left. I haven't done any testing on that regard but that's what it appears to do.
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I don't believe it to be a battery problem, because I've been on GB with absolutely no problems and exceptional battery... I just upgraded to ics not long ago, and the battery life instantly screwed up

Have you set the cpu governor to anything silly like performance?
Have you let it charge up fully at least once?
Search xda for "better battery stats" app, use it to see if you're getting deep sleep.

Flash hefe over release 8 and youll have a little better battery. Proton doesnt deep sleep
Sent from my SGH-T959V using Tapatalk 2

Proton DOES deep sleep. That was one of its major features.
Certain scheduler/governor combinations work better on different kernels, though. If the specific one you like most sleeps better on Hefe, great. If the one you like does best on Proton, great. Just be aware that most issues are either physical or user-inflicted...
In this case, your battery is almost certainly dying. The variance in power over a reboot is a definite tell that your battery is probably swollen. If you can spin it on a table, the cells are starting to die. This does not mean you can't keep using it, but it does mean that your battery life will be irregular. It also means that you'll have significantly "higher" battery levels if you reboot the phone with external power connected, but the battery will discharge very quickly if it hasn't actually reached whatever level it believes it should be at.