We had noted that one of the revolutionary features of the new iPad is its battery, which has 70% more capacity than iPad 2.
The new iPad comes with a built-in 42.5-watt-hour rechargeable lithium-polymer battery, compared to iPad's 25-watt-hour rechargeable lithium-polymer battery. This boosts the battery from 6944 mAh to a monstrous 11,666 mAh if measured in milliamps. It works out to a whopping 70% increase in the capacity of the battery.
While we had noted that this has resulted in a slight increase in weight of the new iPad, we didn't realize that it would also increase the time it would take to charge the iPad. MG Siegler pointed this out in his iPad review.
It appears that they’ve had a fairly major breakthrough in their battery technology. While the new battery clearly isn’t much bigger than the old one, it can hold much more juice (42 watt-hours versus 25-watt-hours). The downside of this is that I’ve found it takes quite a bit longer to charge the new iPad. As in several hours — you’ll probably want to do it overnight.
While the capacity of new iPad's battery is 70% more than iPad 2, it offers similar battery life as iPad 2, which suggests that Apple had to increase the capacity of the third generation iPad's battery to offset any increase in battery consumption by the third generation iPad's Retina Display, 4G LTE radios and A5X chip with quad-core graphics.
Hat tip to Eric Slivka of MacRumors!
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