Miui Battery Life

Discussion in 'Team D1-MIUI' started by Jswerv3, Jan 30, 2011.

  1. Jswerv3

    Jswerv3 New Member

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    Flashed to Miui for the first time this week.. why is the battery life so awful?
    what can i do to make it better.. im kind of a noob at this stuff and still learning and im not really sure what a "kernal" is so maybe that has something to do with it? lol

    [​IMG]
     
  2. omala

    omala New Member

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    try using jamezelle's kernal it will help speed up the phone as well as increase battery life greatly
     
  3. Jswerv3

    Jswerv3 New Member

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    how do I install a kernal?
     
  4. mwhartman

    mwhartman Super Moderator/RS Premium Member

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    Download and install via SPR or CW. Do not wipe.
     
  5. Jswerv3

    Jswerv3 New Member

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    what is SPR or CW? lol sorry im a n00b
     
  6. TRIKOTRET

    TRIKOTRET Active Member

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    the way you installed the rom you can install the kernel but no wipe
     
  7. Droidarola

    Droidarola Member

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    i didn't use any kernel at all, im stock and i just switched yesterday and the phone runs fast and my battery life is pretty damn good. I switched from BB because i was having battery life issues and so for i love this rom.
     
  8. SirVilhelm

    SirVilhelm Member

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    Where can we find his kernel?
     
  9. michael_campbell

    michael_campbell Member

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    look in the compcache thread. Be careful though, it seems rather twitchy. It seems to not work on a lot of phones (mine is one, and it's the first kernel my phone didn't like, and I've tried damn near all of them.)

    So, backup before you flash it!
     
  10. blumpkinblake

    blumpkinblake Member

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    The battery life is pretty crappy no matter the kernel I'm on.

    Sadly I don't think I've made it past like 6:30pm on any given day. The display is down all the way unless I'm outside. Could be the new "1500" mAh battery I got from Seidio.
     
  11. djssupp

    djssupp New Member

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    If you flashed the ROM while not fully charged, you stand a great chance that the battery stats are now incorrect. The battery stats (/data/system/batterystats.bin) are what the ROM uses to determine how much charge is available on the battery. If you _did_ flash with less than 100% battery (and not plugged in) then your stats get locked in to the battery charge you had at flash time. This can be fixed, though.

    You can use a number of apps to find out hoe much juice is in your battery - I use a program called Battery Stats to give me an idea of the voltage available in the battery (My 100% charged battery shows 4.198V after proper calibration). Most batteries will hold a similar amount of juice. If you notice that at 100% charge you have much less thatn that, you're destined to experience poor battery life.

    Now to re-calibrate the battery...

    Plug in your phone. Let it charge to what it thinks is 100%.
    Delete /data/system/batterystats.bin
    Unplug the phone.
    Run the battery down until the phone shuts itself off. (I like to enable all radios - Bluetooth, WiFi, GPS. Turn on the light for the camera flash - torch in the notification drawer - then load up Google Maps and start navigating to someplace, and play some videos. If you have a metal box, like an army ammo box, put the phone in there - it acts as a Faraday cage killing off all the radio connectivity, causing the phone to burn through battery searching for a signal.)
    Plug in the phone in and charge until the phone shows 100% charge.
    Unplug the phone.
    Run the battery down until the phone shuts itself off.
    Plug in the phone in and charge until the phone shows 100% charge.
    Unplug the phone.

    Enjoy your freshly calibrated battery.

    Let us know how your battery life is afterward.
     
  12. TheTyler0013

    TheTyler0013 Member

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    I am not so thrilled about battery on this either, but its the best ROM I have used so far, I hope battery improves in long run

    Sent from my Droid using DroidForums App
     
  13. lithoman

    lithoman Member

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    Any more help on finding that Battery bin. I have searched to no avail. What program are you using ..i have tried File Explorer and OI File manager....nothing
     
  14. djssupp

    djssupp New Member

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    I usually use Android Terminal Emulator or adb on my laptop. If you install terminal emulator, try the following:

    mv /data/system/batterystats.bin /mnt/sdcard/batterystats.bin.bak

    That'll move the stats file onto your SD card (although it's probably not necessary after a new one is generated). After doing so, reboot. But don't forget that you MUST have a full charge before doing this, or else you'll mess up the stats recorded into the new file.

    Also, if you are running Rom Manager and had it install Clockwork Recovery, you can reboot into recovery, go to advanced, and select Wipe Battery Stats.

    Lemme know how you fare.
     
  15. lithoman

    lithoman Member

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    thanks....Clockwork Recovery was the way to go...will let you know how this works out
     
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