Do 20 AA 2500 NiMH batteries really equal a 40 amp hr wheelchair battery?

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  • November 29, 2008 at 12:00 AM #62545
    Anonymous
    Inactive

    just by the numbers, they would seem to hold the same power, but the 40 a/hr wheelchair battery is way heavier and more expensive.

    What am I missing here? This doesn’t make sense to me.

    thanks

    July 24, 2009 at 12:00 AM #64294
    Gary450
    Participant

    Hi,

    The 40Ah wheelchair battery is probably 12v, which is 480 watts of power (40 x 12).

    20x AA 2500Mah NiMH is 20×2.5Ah = 50Ah, but its 50Ah at 1.2v, so total watts stored is 50 x 1.2 = 60 watts.

    The wheelchair battery stores alot more power, thats why its heavier and more expensive!

    Gary.

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