It
looks like the iPad 3 features a battery which is 70 percent bigger
than that of the iPad 2,
which would explain why the device is capable
of running for almost the same amount of time over 4G as the iPad 2 over
3G.
According to 9 to 5 Mac
the iPad 3 features a 42.5 watt hour battery, where as the iPad 2
features a 25 watt hour battery, and it will be interesting to see how
long the battery lasts in every day use.