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How is battery capacity calculated ?

Discussion in 'Electronic Design' started by [email protected], Jan 10, 2014.

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  1. Guest

    To all the electronics gurus on this newsgroup -
    how is battery capacity decided - for example
    if I buy a 6 Volt 5AH sealed lead acid battery,
    how did the manufacturer come up with the number
    5AH ?
     
  2. Phil Allison

    Phil Allison Guest


    ** You could easily Google that question you know.

    FYI:

    For SLA batteries, makers use the "20 hour rate" for the published AH
    figure.

    So for 5AH, the battery is discharged at 250mA for 20 hours for a final
    terminal voltage not less than 1.7V per cell.

    http://www.steveduncan.net/assets/images/mfg_curves.jpg


    ..... Phil
     
  3. Artem

    Artem Guest

    Who is the manufacturer? Some manufacturers provide discharge/charge curves. Bear in mind that the lead-acid batteries rapidly degrade at 100% charge / discharge cycle.
     
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