Apple confirmed today that "overcharging" the new iPad will not destroy the device. CNBC’s John Fortt and other Apple blogs previously reported that charging your new iPad after the screen indicates 100% "could harm the longevity of the battery." Apple told AllThingsD that the iPad 3 does display a 100% charge before reaching maximum capacity, but added that all Apple devices do this.
Apple VP Michael Tchao said that the new iPad will continue to charge to 100% before discharging a small amount. The device will then repeat this process until it's unplugged. “That circuitry is designed so you can keep your device plugged in as long as you would like,” Tchao said. “It’s a great feature that’s always been in iOS.”
In an early iPad 3 review TechCrunch noted that the new iPad takes longer to charge and heats up after prolonged use.
"One other slight downside which I have to assume is related to either the battery or the LTE functionality is that unlike previous iPad models, the new iPad does get noticeably warm in the lower left corner after prolonged use. "
The reviewer made it clear that the iPad only gets warm, not hot, but some iPad 3 owners are already complaining that the tablet is getting too uncomfortable to hold while watching movies or playing games.
A thread on the MacRumor forums seems to confirm that the iPad 3 is warming up in the lower left corner when used for an extended amount of time. Some believe this is due to the 4G LTE, or the stronger battery Apple added to handle the power hungry iPad 3 features.
The third generation iPad is bigger, badder and more power hungry than the iPad 2. All its new features like Retina Display, LTE and extra RAM are great, but they require more battery consumption to operate. Apple did an amazing job of giving the new iPad the same amount of battery life (about 10 hours) as the iPad 2, but does the massive new 11,666mAh battery take longer to charge? According to an early review from TechCrunch it does.
"So how was Apple able to keep the battery life the same while adding LTE and without drastically changing the design? 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."