Last weekend CNBC reported that charging over the 100% “could harm the longevity of your battery”, which now seems to be a miscommunication as Apple have now clarified that issue is not in fact an issue, you can view the statement made be Apple’s Vice President of iPad Marketing, Michael Tchao below:
Apple does in fact display the iPad (and iPhone and iPod Touch) as 100 percent charged just before a device reaches a completely charged state. At that point, it will continue charging to 100 percent, then discharge a bit and charge back up to 100 percent, repeating that process until the device is unplugged.
Doing so allows devices to maintain an optimum charge, Apple VP Michael Tchao told AllThingsD today.
“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.”
That sounds great t me, certainly makes me feel better when leaving my iDevices to charge overnight.