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    XPS 9 cell battery after 3 months only 7271mWh Full Charge Cap. ???

    Discussion in 'Dell XPS and Studio XPS' started by Riccardo83, Jul 25, 2010.

  1. Riccardo83

    Riccardo83 Notebook Evangelist

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    After 3 months my batteries full charge capacity is only 7271 of 7800 ? is that normal?

    I tried to fully discharge and fully charge but still
     
    Riccardo83, Jul 25, 2010
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  2. michom

    michom Notebook Guru

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    after 3 weeks mine is at 6882mWh... I discharge it from time to time... didn't help... now is that normal? Or should I contact Dell?
     
    michom, Jul 25, 2010
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  3. tvdang7

    tvdang7 Notebook Evangelist

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    my first battery was like your's my replacement battery was worse. my 3rd is still at max capacity after like 10 discharges which im very happy about. Its the luck of the draw.
     
    tvdang7, Jul 25, 2010
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  4. Riccardo83

    Riccardo83 Notebook Evangelist

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    i think i had like 7300 and then 76xx and now 7271. is it possible that it changes from time to time and gets better ?
     
    Riccardo83, Jul 25, 2010
    #4
  5. michom

    michom Notebook Guru

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    The more important question is, how reliable is this HWMonitor when it comes to battery wear measurements?
     
    michom, Jul 25, 2010
    #5
  6. Riccardo83

    Riccardo83 Notebook Evangelist

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    no clue, is there any better tool out there?
     
    Riccardo83, Jul 25, 2010
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  7. Uruha

    Uruha Notebook Consultant

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    you can check ur wear on ur BIOS i believe. thats what the rep told me but i removed my battery. How does the battery warranty work? Cause I want a new one before a year is over. It got 5% wear after just a week.
     
    Uruha, Jul 25, 2010
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  8. entrance002

    entrance002 Notebook Consultant

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    DO NOT FULLY DISCHARGE. I lost 1-2% every single time I fully ran out of battery b/c I decided not to carry the charger with me to school. I've used my 9-cell for over 12 months, and capacity has dropped 9%.

    I've never yet experienced losing capacity when I am charging and not let the battery run out on me. For the past 4 months, I've never drained the battery, and my capacity has stabilized at -9%, and the absolute max cap value has not dropped either.

    I have a feeling you might've accelerated the loss of capacity by draining it.

    Alternatively, you may have also had a slighly lower actual capacity to start with. (They usually all say 7800, but perhaps the actual max capacity when you received the battery was already <7800).
     
    entrance002, Jul 25, 2010
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  9. jnkw

    jnkw Notebook Guru

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    And actual maximum capacity may vary based on operating conditions, etc. The advertized maximum capacity is likely measured in optimal conditions and in a best-case use scenario. Actual usage of the battery is likely to diminish the maximum charge by a little at the start before it stabilizes eventually.
     
    jnkw, Jul 25, 2010
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  10. gpig

    gpig Notebook Deity

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    Don't confuse actual loss with reported loss. The "updates" occur when the battery is very low, but loss happens regardless.
     
    gpig, Jul 25, 2010
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