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Root Really Bad Battery Drain

Discussion in 'Android Devices' started by Shmooey, Jan 7, 2013.

  1. Shmooey

    Shmooey Well-Known Member
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    Alright so when my phones screen is off the battery barely drains at all but when i actually goto use it (listen to music, go on facebook, text people, etc.) i get crazy battery drain and i have nooo idea why
     

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  2. Rxpert83

    Rxpert83 Dr. Feelgood
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    Well, the screen is the single biggest battery user.

    Try turning down the brightness

    What Rom/kernel are you on?
     
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  3. Shmooey

    Shmooey Well-Known Member
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    My screen brightness is only at about 25%
    Rom: Nitrous 1.6.3
    Kernel: Stock
     
  4. Rxpert83

    Rxpert83 Dr. Feelgood
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    A custom kernel would be my first suggestion. I've been out of the OG game for too long to make a sense kernel suggestion. Hopefully mikestony can chime in, I see he thanked one of my earlier posts :)
     
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  5. Mikestony

    Mikestony ~30% Carbon Black ±
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    My question would be, how long is the screen on?
    As Rxpert stated, the screen will suck up alot of juice if it is on for a long time.

    Edit: and what is "crazy battery drain"? to you. I mean like, does it kill the battery in 3 hours? or....:)
     
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  6. Shmooey

    Shmooey Well-Known Member
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    i guess i was a little vague lol but what i mean by crazy battery drain is say i could try to check facebook or text someone and itll drain my battery like 10% in only 1 or 2 minutes my screen isnt usually on, i have it set to turn off after 30 seconds and lately the only things ive actually been using my phone for is to either text people, listen to music, or check facebook and it just seems to be draining my battery waaay faster than it should be
     
  7. Rxpert83

    Rxpert83 Dr. Feelgood
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    Can you take a screenshot of your battery graph?

    Try downloading either gsam battery monitor or betterbatterystats. They can help you pin down if any apps are causing the drain.

    I'm assuming since your battery isnt draining when the screen is off that's not the problem though
     
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  8. Mikestony

    Mikestony ~30% Carbon Black ±
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    How long have you been on this rom? And I assume the kernel is the one that came with the rom?
    If you have been on the rom for only a couple days, give it more time for the kernel to settle in.
    After that, if the battery life still stinks, then either A: flash another kernel, or B:flash another rom. Not all rom/kernel combos act the same on different phones.
    What other roms have you tried?
     
  9. Shmooey

    Shmooey Well-Known Member
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    ive been on this rom for about a week and a half and im on the kernel that came with the rom, the only other rom ive tried is MikG's 3.11, and about the screenshot of the battery graph, i have no idea how to put a picture on here ._.
     
  10. Robobob1221

    Robobob1221 Android Enthusiast
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    When you flashed the ROM did you wipe cache/dalvik before and after, did you wipe the data/system prior to flashing??
    Are you using an RA based recovery or ClockWorkMod?

    I would suggest switching kernel to one of classic/underworld. There are others, anthrax or lionfish for example.
     
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  11. Shmooey

    Shmooey Well-Known Member
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    i wiped the dalvik cache/cache b4 but not after and i did wipe the data/system aaand im using an ra based recovery
     
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  12. Robobob1221

    Robobob1221 Android Enthusiast
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    Did you do a data restore via titanium backup or anything else?
     
  13. Shmooey

    Shmooey Well-Known Member
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    nope i started from scratch on this rom, the batterys fine when im not really using my phone but once i do anything it just drains it alot
     
  14. Mikestony

    Mikestony ~30% Carbon Black ±
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    Is the rom you are on a sense rom?
    If so, try this kernel:

    http://forum.xda-developers.com/showthread.php?t=1557248

    Just flash it like a rom but just wipe cache and dalvik only. then flash in recovery :)
     
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  15. Robobob1221

    Robobob1221 Android Enthusiast
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    Is it an old battery? Could be an idea to replace it if so.
    Or else as suggested try a different kernel and see if the drain continues
     
  16. Shmooey

    Shmooey Well-Known Member
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    ok so i flashed it aaand so what will this do/do i have to do anything??
     
  17. Mikestony

    Mikestony ~30% Carbon Black ±
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    Just leave it run for a few days to see if anything changes.
    Don't make any governer or scheduler changes until 3 or 4 days from now:) (and no cpu speed changes either) :p
    Just monitor how the phone is running, battery life etc.
     
  18. MizzouBrent

    MizzouBrent Android Expert
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    Are you seeing the drop when you take it off charger after a full charge?
     
  19. Shmooey

    Shmooey Well-Known Member
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    well sort of, in the morning, i take it off the charger (100% charge) get on the bus and listen to music for about 30 minutes and when i get off and look at my phone its gone done about 15-20%
     
  20. MizzouBrent

    MizzouBrent Android Expert
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    HTC stock design is to have it basically not charge much past 90% so it will show 100% but basically drop almost immediately to 90% if you run a kernel with SBC you will not see this drop.
     
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  21. Shmooey

    Shmooey Well-Known Member
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    So the kernel helped a bit and then i switched batteries and it helped a looot so ya with the combination of the kernel + the new battery my phones life is awesome
     
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  22. Mikestony

    Mikestony ~30% Carbon Black ±
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    Did you flash the sbc version or the non sbc version of the kernel?
     
  23. Shmooey

    Shmooey Well-Known Member
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    non sbc because i dont quite know what sbc is or how to use it
     
  24. Robobob1221

    Robobob1221 Android Enthusiast
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    It's superior battery charging or something like that. As mentioned earlier HTC phones are made to only charge around 90%capacity. SBC ensures you get as close to a true 100%charge basically. Therefore even longer battery life.
     
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  25. Mikestony

    Mikestony ~30% Carbon Black ±
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    And it will do it automatically. You need not do anything special or extra.

    Edit: let me add to this...you will notice this sbc effect after a night of charging.
    When you take the phone off of the charger, it will remain at 100% alot longer than if you were using a non-sbc kernel.
    Let me also add, that in order for sbc to take effect, after fully charged, while still plugged in, it will take another 1-2 hours for the sbc to kick in.
    In other words, if you charge until the green light comes on and you unplug it, your voltage will drop like it would normally. If you charge until the green light comes on, then leave it plugged in for another 1-2 hours, then unplug it, you will remain at 100% for a longer period of time.

    I can attest to that fact as I have used the Mason G sbc kernel while on Decks Reloaded rom.
    It was very nice.

    Quote taken from here: http://androidforums.com/evo-4g-all-things-root/389360-kernels-dummies.html ....written by some big silver robot :p thanks Ocn!

     
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