Mar 20, 2010, 02:06 PM #1 Semdk macrumors member   Join Date: Feb 2010 The iPad battery I wanted to buy a HyperMac battery for my iPhone and (iPad) and wondered how big the iPad's battery is.. At Apple.com 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... (: 0
 Mar 20, 2010, 02:11 PM #2 Gav2k macrumors 603     Join Date: Jul 2009 I would wait till it's released mate to be sure. __________________ iphone 5 32gb - iPhone 6+ 64gb - MacBook Air i7 - MacBook Pro 2012 2.5ghz - mac mini 2011 dgpu i5 2.5Ghz 0
 Mar 20, 2010, 03:40 PM #3 spazer macrumors member   Join Date: Sep 2006 Location: 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? Last edited by spazer; Mar 20, 2010 at 03:46 PM. 0
 Mar 20, 2010, 05:03 PM #4 Semdk Thread Starter macrumors member   Join Date: Feb 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? 0
Mar 20, 2010, 05:13 PM   #5
matticus008
macrumors 68040

Join Date: Jan 2005
Location: Bay Area, CA
Quote:
 Originally Posted by spazer We need to know what the voltage of the iPad battery is. Anyone know?
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).

Quote:
 Originally Posted by Semdk 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?
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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