calibrate your battery

This is a discussion on calibrate your battery within the Nexus One FAQ & How-To's forums, part of the Nexus One category; Hey folks, ive been asked a lot, how to calibrate your battery, to get more life out of it... Calibrate your Battery Calibrate the battery ...

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Thread: calibrate your battery

  1. #1
    Senior Member RinTinTigger's Avatar
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    Cool calibrate your battery

    Hey folks,

    ive been asked a lot, how to calibrate your battery, to get more life out of it...

    Calibrate your Battery

    Calibrate the battery by completely draining it until the phone completely shuts itself off.
    Turn the phone on again and let it shut itself off one more time.
    Then charge your phone while it is off for over 8 hours.
    This will fully charge the battery so that when the Android is turned on, it now sees the battery as full.

    It is recommended to repeat this process at least one more time.

    You should see a significant increase in your battery’s charge life.

    Calibration of a battery can be done at any point and a maintenance calibration is recommended every month.


    RECALIBRATION:

    A recalibration is mostly needed, when dealing with different kernels (ROOT!). Most custom recovery images provide the option "battery stats wipe" under the menue "Wipe".

    Here is how ya do it!

    1. Enter Recovery Mode
    2. do a full nandroid (or nandroid+ext) backup
    3. Enter "Wipe"-Menue
    4. do "Battery stats wipe"
    5. reboot

    Then you just take the steps from a bove to continue:

    Calibrate the battery by completely draining it until the phone completely shuts itself off.
    Turn the phone on again and let it shut itself off one more time.
    Then charge your phone while it is off for over 8 hours.
    This will fully charge the battery so that when the Android is turned on, it now sees the battery as full.

    It is recommended to repeat this process at least one more time.

    You should see a significant increase in your battery’s charge life.

    Calibration of a battery can be done at any point and a maintenance calibration is recommended every month.


    Tigger


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  3. #2
    Super Moderator sliceburgslim's Avatar
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    Nice! I should do this with all the kernel flashing I do. Thanks for posting!
    [PHONE] Nexus 4

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  4. #3
    Junior Member rensky's Avatar
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    has anyone done this and has anyone seen a difference?

  5. #4
    Senior Member NeonMonster's Avatar
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    Quote Originally Posted by rensky View Post
    has anyone done this and has anyone seen a difference?
    This is general battery care and they recommending doing it for any device that has a battery.

    I've never done it with my Nexus however, because I can't leave the device turned off for that long and not use it! X__X
    @NEONmonstar
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  6. #5
    Junior Member GandJim's Avatar
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    Quote Originally Posted by RinTinTigger View Post
    Calibrate the battery by completely draining it until the phone completely shuts itself off.
    Turn the phone on again and let it shut itself off one more time.
    I'm a perfect dummy concerning all these things and must say I'm a little bit scared to do this. Isn't there a risk of losing some information? Time and date is the first thing that comes to my mind, but maybe also some other more technical data I haven't a clue of what they mean?

    I have another phone which I put aside for months (if not years). When I tried to recharge it again to lend it to a visiting friend, it just doesn't work anymore. I changed the battery, but the phone stays dead (or more precisely the screen stays dead). No idea what the problem is. Maybe it's nothing relating to the battery and didn't bother to find out, as it's a cheap phone, but would be devastated if it happens to my Nexus.

    Jim

  7. #6
    Android Lurker venki5star's Avatar
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    Thanks. I tried this with no faith. But I could see a vast different after the first calibration. Thanks to the poster.

  8. #7
    Junior Member floh's Avatar
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    Quote Originally Posted by GandJim View Post
    I'm a perfect dummy concerning all these things and must say I'm a little bit scared to do this. Isn't there a risk of losing some information? Time and date is the first thing that comes to my mind, but maybe also some other more technical data I haven't a clue of what they mean?
    There should not be any problems, as for the clock etc. there is another power source and all other data will be stored on the flash memory (which does not need power to store it's data at least for some months).

    Just think about it, you can easily take out the battery of your phone (e.g. before you send it in for service) and won't lose data.

  9. #8
    Senior Member dd4005's Avatar
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    I'm surprised this would be necessary with a Lithium (-Ion or -Polymer) battery. This is the kind of procedure that goes back to the days of NiCad and NiMH batteries that suffered from the memory effect.

    Saying that though, I'm going to try it.
    o- Nexus One running CyanogenMod 6.0
    o- Samsung Galaxy Tab running stock Froyo (update: running Gingerbread and virtually useless)

  10. #9
    Senior Member tonybhoy's Avatar
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    to add to the o/p,when your phones battery runs down and you get the black screen press and hold power buttond and trackball till you get the bootlogging screen(white)just leave your n1 sitting on that for a while and it will drain the rest of the juice out of the battery,don't panic when going to charge it and you don't get the orange light as it takes a bit of time for it to charge itself up so best leave it over night,i do this once a month and notice a decent change in battery life

  11. #10
    jah
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    Senior Member jah's Avatar
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    I've heard that this is unnecessary and can damage the battery. Are we sure this is a good idea?

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