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    Capacity of a T500 9-cell battery?

    Discussion in 'Lenovo' started by ITemplate, May 1, 2010.

  1. ITemplate

    ITemplate Notebook Consultant

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    Hi,

    According to this thread, the capacity of the T500 9-cell is over 84 Wt. But my new one is only 71 Wt? Could someone with a T500 using the 9-cell battery look into Power Manager and write back the original capacity? And of course also if it's an original battery or not - Thanks!

    --
    Werner
     
    ITemplate, May 1, 2010
    #1
  2. lead_org

    lead_org Purveyor of Truth

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    84.24 Wh

    Panasonic
     
    lead_org, May 1, 2010
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  3. ITemplate

    ITemplate Notebook Consultant

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    Thanks - then it's confirmed. I had some strange things happening with my 9-cell and if it report 71 Wt it must be defect.

    Edit: Wauw I already thanked you :)

    --
    Werner
     
    ITemplate, May 1, 2010
    #3
  4. MidnightSun

    MidnightSun Emodicon

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    Usually, the capacity of a new battery is a tiny bit over the design specified capacity, which is supposed to be 84Wh. Mine originally came with 86Wh.
     
    MidnightSun, May 1, 2010
    #4
  5. scholar80

    scholar80 Notebook Guru

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    In case it still helps:

    Full Charge: 76.25 Wh
    Design Capacity: 84.24 Wh
    Sanyo
     
    scholar80, May 1, 2010
    #5
  6. vimvq1987

    vimvq1987 Notebook Consultant

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    84.24Wh
    Sanyo
     
    vimvq1987, May 2, 2010
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  7. ITemplate

    ITemplate Notebook Consultant

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    Thanks all. @scholar80: How many cycles and what is the date of first use?
     
    ITemplate, May 2, 2010
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  8. LaptopGun

    LaptopGun Notebook Evangelist

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    Panasonic battery.
    Design capacity of 84.24 Wh.
    Built 9/11/2008 (gulp...)
    72 cycles

    It's down to 75.50 Wh, but I don't know if having my charge threshold set to 94% has something to do with that. With Intel SSD, Intel graphics, and Timers Off plan I've gotten anywhere between 6 hours 30 minutes and 7 hours 15 minutes.
     
    LaptopGun, May 2, 2010
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  9. scholar80

    scholar80 Notebook Guru

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    45 cylces and first used 09-2009 :)
     
    scholar80, May 2, 2010
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  10. StealthTH

    StealthTH Notebook Evangelist

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    Sanyo Battery
    Design Capacity of 84.24 wh
    Full Charge Capacity 82.74 wh
    Cycles 36
    Built 10/2008
    First Use 04/2009 (was sitting around for awhile)

    I know I have a T400, but they have the same cells/capacity of T500 just in a different case.
     
    StealthTH, May 3, 2010
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  11. ITemplate

    ITemplate Notebook Consultant

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    It's interesting why you have only lost 2 Wh with almost the same specs as scholar80 for example. I wonder if that's all due to the difference between a T400 and a T500? How is your battery setup? When does charging begin and when does it end? (Power Manager -> Battery -> Maintenance)

    --
    Werner
     
    ITemplate, May 3, 2010
    #11
  12. StealthTH

    StealthTH Notebook Evangelist

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    35%-95%. I also have a 6 cell battery and I rotate on a monthly basis so that is probably why.
     
    StealthTH, May 3, 2010
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  13. scholar80

    scholar80 Notebook Guru

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    I'm usually on AC power. I left battery charging threshold to Power Manager, but it seems to charge at 98% and stop at 100%.

    I realize this can't be good (likely the reason for my capacity drop) and will soon be setting my own thresholds (probably 70% to 95% as recommended by Power Manager).
     
    scholar80, May 3, 2010
    #13