In six hours, I managed to consume 3/4 of the battery strength with occasional use, switching between my home WiFi and AT&T's 3G/Edge network (varying, depending on where I was, while we were doing errands).
Well, just about anything that uses WiFi is going to be hard on batteries, compared with the optmising power modes of a proper mobile network.
Looking at the review, it is 3G connectivity that kills the battery, not wifi. When Walt tested Internet usage using 3G he managed 6 hours using 3G compared to 9 hours on the 1st gen using Wifi. Which isn't really a surprise as 3G is well known for using a lot of juice.
Wasn't this the reason Apple gave for not putting 3G into the original iPhone?
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