HOW TO: Solve Battery Life Issues

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suppliesidejesus

Senior Member
Apr 1, 2010
609
117
***NOTICE***
The ROM Manager version of CWM does NOT wipe battery stats properly, as with many other things. What you need is jt1134's version of CWM that is all happy and works and stuff.

You can find his happy CWM here. And here. And also here.

And here.

Big thanks to LegionTHEFecalExcretion for the heads up on that.

***END NOTICE***

NOTE: On current DL30 and EB01 ROMs, you will not see battery life like you did on DL09 with undervolted kernels. There are NO undervolted kernels as of yet, everything kernel wise with Froyo ROMs in very much stock. These steps will improve your battery life in comparison to when you flashed Froyo, but you are not going to see spectacular changes in battery life up to what you were getting with undervolted DL09, etc. It's just not possible until we get undervolted kernels and Froyo matures for our device, development wise.

Hi everyone, I've been seeing a lot of threads about bad battery life, whether switching to Kaoscinate, Vanilla, or DL30. Stop it! Just kidding. There is a simple process everyone should follow when switching between different enough ROMs, like AOSP, CM6 and TW Eclair and Froyo. This is how you retrain your battery.

1. Charge your battery to 100% (when it gets there, let it SIT there, your phone is NOT reporting correctly).

2. Reboot to Recovery and Advanced -> Wipe Battery Stats.

3. Reboot, and use your phone until it is VERY low (5-10%, you can let it die if you want).

4. Charge your phone back to 100%

5. (Optional) Power down, then power on phone. (Thanks goes to BrwnSuperman for this suggestion, give it a try!)

Your battery issues should be solved. This needs to be done every once in a while, especially when switching between different ROMs and OS versions.

User dalrym05 posted this alternate method for retraining the battery on page 4 as well, so I thought I would share it here in the OP. I'm posting this as a USE AT YOUR OWN RISK method, as I have not tested it, and am not quite sure what the *228 steps for it actually accomplish and have to do with retraining the OS battery reporting, so I'm leaving it quoted to dalrym05 for the time being.

Here were my steps to better battery.
1.*228 option 1
2.*228 option 2
3. Run battery completely dead to 0%
4. Plug in and boot immediately into cwm
5. Wipe battery stats and dalvik cache
6. Reboot and let charge fully before unplugging
7. Completely discharge again and fully charge again.

After this you should notice a very nice increase in battery as I did. My battery life is back up to par with eclair.

NOTE: I did edit his post to make it a little more clear. I'm slightly anal retentive that way. :)

HybridByNature had an excellent suggestion on page 4. If people have good tips and tricks for maintaining good battery life, and they are easily reproducible, then I will gladly add them to the OP here. What works for you?

This might also be a good place to add tips & tricks to extending battery life.

IE

-Close programs that you aren't using.
-Don't leave your camera or navigation running in the background.
-Turn off WiFi & GPS etc when you aren't using them.
-Don't run your screen at full brightness if you can help it.
-Figure out what uses more battery life than other things:
Pandora, internet browsing, downloading, camera/camcorder, Angry Birds etc.

If you are rooted, try and narrow it down to the best kernel/theme for your situation. I've found that I have better battery with a non-voodoo kernel but the performance increase is worth it so that's a trade-off that I make.

Let's hear from our readers: What is working for you?
 
Last edited:

Holliday

Senior Member
Dec 6, 2010
61
5
Would not surprise me if this is all it is. I have turned my phone off at 5% for an hour and turned it back on without charging and then it showed 45%. I know when batteries are low letting them sit a little bit can help, but not that much.

It is just being reported inaccurately by the OS.
 
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lucas.scott

Senior Member
Mar 10, 2009
1,147
240
Nashville, TN
Definitely works though. Did it yesterday. Good post. It has been posted in other threads ... but I think we all know people don't read through everything very often.

Sent from my SCH-I500 using XDA App
 

ataranine

Senior Member
Nov 27, 2009
523
18
McLeansville, North Carolina
I did this last night and it didn't work too well for me.
Also, when I go to wipe battery stats in the recovery, it doesn't tell me if it wiped or not, just goes back to the advanced menu.
And also, should I be concerned that when I cold boot into the recovery, it doesn't appear to be CWM? It says Android recovery...I know I have CWM recovery installed.
 

miguel11691

Senior Member
Aug 31, 2007
796
42
Samerhing happens to me... and I just took it off the charger and I'm on 96 percent in less than 1 min

Sent from my SCH-I500 using XDA App
 

johnnyv5

Senior Member
Oct 12, 2006
336
8
I did something similar. I charged to 100% while it was on, removed from charger then powered off. When phone was off I plugged charger back in and waited til it was at 100% then unplugged again and powered on. Waited until phone was completely on then unplugged again and connected to charger. Waited til it was at 100% and while still plugged in at 100% booted into recovery and wiped battery stats. Then rebooted phone into OS and unplugged. I had tried this previously with DL09 and it helped a little. Last night I wanted to see how my battery would drain after doing this. With WiFi on and I got about 10 emails during the night, from 8:30pm to 6:00am I lost only 13%!!! Previously I would have lost from 35 to 40%. ymmv

jv
 
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Syn Ack

Senior Member
Jan 20, 2011
1,627
421
Atlanta
Spare Parts says "Time spent without sleeping: 53m 15s (100%)

Wow.

If I go to Battery History and change the top dropdown to Partial Wake Usage, it says Android System at the top with a bar that's at least 75% full.

Looks like Samsung has to make an update or patch to this LEAKED version LOL. I'm so fed up with people failing from Samsung and Verizon for this device.
 

johnnyv5

Senior Member
Oct 12, 2006
336
8
Spare Parts says "Time spent without sleeping: 53m 15s (100%)

Wow.

If I go to Battery History and change the top dropdown to Partial Wake Usage, it says Android System at the top with a bar that's at least 75% full.

Give it some time. I was showing that as well but after about half a day I rechecked and it showed the correct percentage for Running time.

jv
 

johnnyv5

Senior Member
Oct 12, 2006
336
8
yours was also telling you it spent 100% of it's time without sleeping? Mine's been doing it for 2h 9m 25s...the same amount of time my phone's been on. :confused:
I was pulling my hair out trying to figure this out too. It seems to have solved itself. Right now it is showing 47% usage. Sorry I couldn't help.

Jv


Sent from my SCH-I500 using XDA App
 

suppliesidejesus

Senior Member
Apr 1, 2010
609
117
This is a proven technique, and it takes patience. Seeing the battery drop from 100% down to 95 or 96% after unplugging is normal behavior. I've done this already. Left my phone unplugged overnight and lost 1% battery. If you're too impatient to take the time to do this, that's your loss. You'll see the battery life "improve" over the course of a few days as the reporting gets more and more accurate.

Sent from my Fascinate using the XDA app
 
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Reactions: johnnyv5

Kamar234

Senior Member
Nov 11, 2009
294
9
New York
I agree with supplysidejesus. This is a standard practice and should be done with each major rom or kernel install. This leak hasn't been put long enough for most of us to know what our expected battery life will be yet. Give it a few days for your phones to adjust.
 
Last edited:

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  • 5
    ***NOTICE***
    The ROM Manager version of CWM does NOT wipe battery stats properly, as with many other things. What you need is jt1134's version of CWM that is all happy and works and stuff.

    You can find his happy CWM here. And here. And also here.

    And here.

    Big thanks to LegionTHEFecalExcretion for the heads up on that.

    ***END NOTICE***

    NOTE: On current DL30 and EB01 ROMs, you will not see battery life like you did on DL09 with undervolted kernels. There are NO undervolted kernels as of yet, everything kernel wise with Froyo ROMs in very much stock. These steps will improve your battery life in comparison to when you flashed Froyo, but you are not going to see spectacular changes in battery life up to what you were getting with undervolted DL09, etc. It's just not possible until we get undervolted kernels and Froyo matures for our device, development wise.

    Hi everyone, I've been seeing a lot of threads about bad battery life, whether switching to Kaoscinate, Vanilla, or DL30. Stop it! Just kidding. There is a simple process everyone should follow when switching between different enough ROMs, like AOSP, CM6 and TW Eclair and Froyo. This is how you retrain your battery.

    1. Charge your battery to 100% (when it gets there, let it SIT there, your phone is NOT reporting correctly).

    2. Reboot to Recovery and Advanced -> Wipe Battery Stats.

    3. Reboot, and use your phone until it is VERY low (5-10%, you can let it die if you want).

    4. Charge your phone back to 100%

    5. (Optional) Power down, then power on phone. (Thanks goes to BrwnSuperman for this suggestion, give it a try!)

    Your battery issues should be solved. This needs to be done every once in a while, especially when switching between different ROMs and OS versions.

    User dalrym05 posted this alternate method for retraining the battery on page 4 as well, so I thought I would share it here in the OP. I'm posting this as a USE AT YOUR OWN RISK method, as I have not tested it, and am not quite sure what the *228 steps for it actually accomplish and have to do with retraining the OS battery reporting, so I'm leaving it quoted to dalrym05 for the time being.

    Here were my steps to better battery.
    1.*228 option 1
    2.*228 option 2
    3. Run battery completely dead to 0%
    4. Plug in and boot immediately into cwm
    5. Wipe battery stats and dalvik cache
    6. Reboot and let charge fully before unplugging
    7. Completely discharge again and fully charge again.

    After this you should notice a very nice increase in battery as I did. My battery life is back up to par with eclair.

    NOTE: I did edit his post to make it a little more clear. I'm slightly anal retentive that way. :)

    HybridByNature had an excellent suggestion on page 4. If people have good tips and tricks for maintaining good battery life, and they are easily reproducible, then I will gladly add them to the OP here. What works for you?

    This might also be a good place to add tips & tricks to extending battery life.

    IE

    -Close programs that you aren't using.
    -Don't leave your camera or navigation running in the background.
    -Turn off WiFi & GPS etc when you aren't using them.
    -Don't run your screen at full brightness if you can help it.
    -Figure out what uses more battery life than other things:
    Pandora, internet browsing, downloading, camera/camcorder, Angry Birds etc.

    If you are rooted, try and narrow it down to the best kernel/theme for your situation. I've found that I have better battery with a non-voodoo kernel but the performance increase is worth it so that's a trade-off that I make.

    Let's hear from our readers: What is working for you?
    1
    Would not surprise me if this is all it is. I have turned my phone off at 5% for an hour and turned it back on without charging and then it showed 45%. I know when batteries are low letting them sit a little bit can help, but not that much.

    It is just being reported inaccurately by the OS.
    1
    This how to has been reposted like 9001 times. But yes, this is one day to do it.

    Yes, but not as a thread, it gets posted in everyone else's "Why does my battery life suck ass" threads, so I made this so maybe people would see it and try it before posting another useless question thread in Development.
    1
    I did something similar. I charged to 100% while it was on, removed from charger then powered off. When phone was off I plugged charger back in and waited til it was at 100% then unplugged again and powered on. Waited until phone was completely on then unplugged again and connected to charger. Waited til it was at 100% and while still plugged in at 100% booted into recovery and wiped battery stats. Then rebooted phone into OS and unplugged. I had tried this previously with DL09 and it helped a little. Last night I wanted to see how my battery would drain after doing this. With WiFi on and I got about 10 emails during the night, from 8:30pm to 6:00am I lost only 13%!!! Previously I would have lost from 35 to 40%. ymmv

    jv
    1
    This is a proven technique, and it takes patience. Seeing the battery drop from 100% down to 95 or 96% after unplugging is normal behavior. I've done this already. Left my phone unplugged overnight and lost 1% battery. If you're too impatient to take the time to do this, that's your loss. You'll see the battery life "improve" over the course of a few days as the reporting gets more and more accurate.

    Sent from my Fascinate using the XDA app