The iPad battery

Discussion in 'iPad' started by Semdk, Mar 20, 2010.

  1. macrumors member

    Feb 24, 2010
    I wanted to buy a HyperMac battery for my iPhone and (iPad) and wondered how big the iPad's battery is..
    At the Tech Spec of the iPad says 25Wh, but since the specs of the HyperMac batterys are in mAH wonder how much those 25Wh are in mAH..
    And how much a 1800mAH battery would charge the iPad... :)
  2. macrumors demi-god


    Jul 24, 2009
    I would wait till it's released mate to be sure.
  3. macrumors member

    Sep 27, 2006
    Northern California
    Here is the formula to determine mAh:

    watt = amp * volt

    So for the iPad:

    25Wh = amp * volt

    Ah = 25Wh / volt

    mAh = Ah * 1000

    We need to know what the voltage of the iPad battery is. Anyone know?
  4. thread starter macrumors member

    Feb 24, 2010
    Since the iPad uses (or can use)(the new adapter is just 10W instead of 5W) the same adapter as the iPhone/iPod's, does that mean that it uses 3.7V like the iPhone?
  5. macrumors 68040


    Jan 16, 2005
    Bay Area, CA
    Nah. We have everything we need.

    Hypermac batteries are 5V packs, so the "Micro" will be about 18Wh. The "mini" is the best bet for a full recharge of an iPad--with room to spare (36Wh).

    The nano will get the iPad to about 1/3 charge.
    It probably does, but there's no information on it yet. It's almost certainly in the 6500-7000mAh range if you're curious (6750 assuming it's 3.7v).

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