Asus F9S - Battery Calibration for better battery life!

Discussion in 'Asus' started by arunragavan, Jan 8, 2008.

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  1. arunragavan

    arunragavan Notebook Consultant

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    Hye guys,

    I have a F9S which i bought from Saturn in Neuss. Seems to be good but i havent explored all the options. When i first plugged in the battery and charged it i could see the maximum the battery got upto was 97%, kinda disturbing but on waiting for just 20 extra minutes the battery went upto 100%.

    After a complete charge of 8-10 Hours, i unplugged and saw the battery meter giving me a timing of 2 hours 10 minutes. Ofcourse my F9S runs on a 6 cell (4800mah) battery.

    Last night i ran the battery down to 23% and then charged it fully, this morning i found that battery meter shows me reading of 2 hrs 30 minutes but just after around 15 seconds after i unplugged this meter reading showed 98% from 100%.

    Does this mean i need to re-calibrate it once again so that i can get more out of the battery?? so that the processor in the battery can recognize the lower touch point?

    Guys please help me, i can find that most recalibration guides are out dated. I would want to properly calibrate my battery so that i can squeeze out maximum of the battery. I surely do'nt want to kil my battery.

    This lappy (F9S) is powerful and i would also like to get the max. out of the battery too which would make it an allrounder atleast for me.

    Thank you!
     
  2. boko

    boko Notebook Consultant

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    i think you can calibrate your battery via bios in asus. Go into bios and find something called battery calibration. I heard that this will empty all your battery and charge it again over 100% that windows recognizes.
     
  3. ClearSkies

    ClearSkies Well no, I'm still here..

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    Battery calibration only synchronizes the % reading that Windows sees with the max mAh charge of the battery (i.e. the full available charge will report as the 100% level, even if the wear is 30%), it doesn't do anything else. Recalibration will not get you "more" time out of the battery.

    A drop to 98-99% after sitting overnight is not unexpected, since all LiIon batteries will normally discharge slowly even when not in use. As for your 97% charge issue above, when the battery gets above 95% the charge rate decreases significantly (it's supposed to) for the last bit of power and thus it takes longer for reaching max charge - that is normal too.

    You do not need to calibrate your battery (and some reports around here suggest that process in some models can harm the total available charge and potentially increase battery wear). Your max time on battery is going to be 2-2.5 hours generally, depending on use. Everything is fine - enjoy your new notebook :).
     
  4. arunragavan

    arunragavan Notebook Consultant

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    Thanks a lot guys, I just wanted more juice out of the battery. Clearshies could you please suggest me a good softwae with which i can check the battery wear and other information on the discharge rate?

    Thanks a lot,
     
  5. ClearSkies

    ClearSkies Well no, I'm still here..

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    MobileMeter gives wear % and discharge rate. Notebook Hardware Control also does discharge rate and battery wear plus offers option to undervolt the cpu, but can have some issues with functionality in Vista. I don't know if RMClock does any battery measurement stuff (I don't use it), but others here might comment.
     
  6. arunragavan

    arunragavan Notebook Consultant

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    Thanks a lot clearskies. I would try it.
     
  7. E.B.E.

    E.B.E. NBR Procrastinator

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    RMClock does read battery, I recommend it over NHC since the latter has issues with Vista and newer notebooks.

    In some cases Vista will forget to disable some devices during hibernation and that will eat up current from the battery. Perhaps that's the explanation for the drop.

    I suggest waiting for a while, if it still acts weird (jumping between 97% and 100% arbitrarily for instance) do a calibration. Otherwise,it's fine.
     
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