Any side effects from the bigger battery?
Actually, yeah. Even though the physical body of the new iPad is basically the same size as the iPad 2, the new iPad has a totally new battery. According to our friends at iFixit, the new iPad's battery boasts an energy rating of 42.5 watt-hours, almost double the iPad 2's (at 25 watt-hours). To do that, Apple physically increased the size of each cell by about 70%. That's mostly good news--it needs that extra power to cope with the new processor, memory, 4G LTE radio, and new screen--but it also has one unfortunate side effect. The thing takes forever to charge. To be fair, we're comparing it to the iPad 2, which fully charges in just a couple of hours when plugged directly into the wall, but the new iPad seems to need an overnight shot of power to get back to 100%. Expect even slower charges via USB.