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    Battery Wear/Percentage problem.

    Discussion in 'Asus' started by tibco, Sep 10, 2009.

  1. tibco

    tibco Newbie

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    Hello, 1st post on this forum! Anyway, i have a problem, i recently purchased an n81vg from newegg and it works great, except for one problem: The battery reports the wrong percentage! I dont think this is a Operating system problem because ive tried ubuntu also, and the problem still persists. I am thinking that this is a bug on the firmware of the battery itself. Ive contacted asus and they sent me a new battery, but the problem still persists on the new battery. No one else who has my notebook has reported this problem. What could be going on?

    PS: more info on the problem, the battery "wear" level jumps randomly from 6% to 20% and then DOWN to 10%, etc. This is the reason why the percentage changes. Since battery percentage is calculated as (current charge/last full charge) if the "last full charge" keeps changing,so does the percentage. Also, the battery still runs for over 15 mins after windows shows a 0% charge level. A calibration did not help.

    Thanks for the help guys.
     
    tibco, Sep 10, 2009
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  2. tibco

    tibco Newbie

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    Bump.
    Also, ive been doing some research on my own on this problem and i read up on mysticgolem's topic, but its 2 years old...but my problem seems very similar to it.
     
    tibco, Sep 10, 2009
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  3. Duct Tape Dude

    Duct Tape Dude Duct Tape Dude

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    That's weird that a calibration didn't help. Maybe try updating your motherboard's BIOS?

    My wear level on my Asus fluctuates a little as well-- but usually by about 7% maximum. I think it's because if the battery level drops only slightly (to >95%) my notebook won't charge it, and it detects that as the maximum charge level. Once it drops below 95% or so it recharges back to 100%.
     
    Duct Tape Dude, Sep 12, 2009
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  4. E.B.E.

    E.B.E. NBR Procrastinator

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    Hmm, yes ASUS historically did have some battery firmware problems (my V6J is one of the affected models). Maybe some of those bugs are still around in new models?

    Anyway, if the wear also jumps back down you're not in such a bad shape. :) Up to 20% fictitious wear, while annoying, is bearable, and since you had the battery exchanged and the new one exhibits the same symptoms, I don't know what else you could do. Of course, there's always battery calibration, but if it's anything like the old battery bugs, that won't help -- as you noticed.
     
    E.B.E., Sep 12, 2009
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