Battery drains quickly under 40%Support


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  1. Alonzzo2

    Alonzzo2 Well-Known Member This Topic's Starter

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    My battery is alright, and can last almost 2 days, but while from 100% to ~40% it drains 'normally' , from 40% to 0% it drains real fast - about 20 minutes phone call.

    anyone else share the same problem?
     

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  2. sado1

    sado1 Well-Known Member

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    Yeah, think that's nothing unusual. It goes another way too - like 10 minutes from 0% to 50% when charging then 2 hours to 100% for me. Just live with it. Using Galaxo [II5] - so have a question to IK4 users: did they improve it in that firmware?
     
  3. KlaymenDK

    KlaymenDK Well-Known Member

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    The battery provides Android with a voltage monitor which can only be used to estimate the remaining capacity. To give an accurate indication, you'd need to monitor the amperage, and neither the battery/phone nor the Android OS have any provisions for that. So what you're seeing is an estimate, and cannot be assumed to be a linear 100-0 scale.

    Have you run the battery down entirely, then recharged it fully? The purpose of this is not to condition the battery (the new types don't need it), but to calibrate the scale. Try it a couple of times (yeah sorry, should take most of a week) and see if your problem lessens or goes away.
     
  4. KlaymenDK

    KlaymenDK Well-Known Member

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    @sado: I have K4 --love it, relatively speaking--but can't really say about this item in particular. I tend to just suddenly realise that my plastic brain has flatlined while I was looking the other way, far away from a power plug. :(
     
  5. qwerty100

    qwerty100 Well-Known Member

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    See my other post on this here...

    http://androidforums.com/samsung-i7...oid-support-what-would-needed.html#post184602

    Basically bewteen releases II5 and IK1, the following mappings were changed.
    The First column is the ADC reading (AnaloguetoDigitalConverter) representing the REAL reading of battery power remaining.

    The 2nd Column shows how for a specific ADC reading, how the pre II5 firmware scaled/mapped this to a percentage.

    The 3rd Column shows the values used for releases II5 and IK1 and possibly beyond

    Note that after II5 the effective battery power percentage reading will drop much quicker than before (for percentages 100 to 51, the mapping tabe is unchanged)

    The other thing is that this does NOT change the battery life, only the effective percentage value reported back to the apps, (and therefore your impression of the battery drain)


    ADC PreII5% II5%
    1030 50 50
    1024 49 48
    1018 48 46
    1012 47 44
    1006 46 42
    1000 45 40
    994 44 38
    988 43 36
    982 42 34
    976 41 32
    970 40 30
    964 39 29
    958 38 28
    952 37 26
    946 36 25
    940 35 23
    934 34 22
    928 33 20
    922 32 19
    916 31 17
    910 30 16
    904 29 15
    898 28 14
    892 27 13
    886 26 12
    880 25 11
    874 24 10
    868 23 9
    862 22 8
    856 21 7
    850 20 6
    844 19 5
    839 18 5
    834 17 5
    828 16 5
    823 15 4
    818 14 4
    812 13 4
    807 12 4
    802 11 3
    796 10 3
    791 9 3
    786 8 3
    780 7 2
    775 6 2
    770 5 2
    724 4 2
    678 3 1
    632 2 1
    586 1 1
    540 0 0
    0 0 0
     
  6. KlaymenDK

    KlaymenDK Well-Known Member

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    Nice reference, qwerty!

    I'm a visual kinda guy, so I made this.

    Edit: Correct header: "pre-i5 vs i5&later" (oops)
    [​IMG]
     

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  7. mrqs

    mrqs Well-Known Member

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    you might wanna change the header on that - it's not a i5 vs k4, but pre-i5 vs i5 & k4 (+future releases?)
     

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