Has anyone else had issues with their iphone4 battery not fully charging? I didn't have any issues the first few weeks, but the last 3 times I've left the phone plugged in overnight to charge, it would be around 94% in the morning. Yesterday I let the battery run all the way down before charging, but it did the same thing. I typically charge the phone about every 3 days. Is this a real issue, or one of those "you'd never know it if it wasn't showing you a percentage" thing? Though, like I mentioned, it used to go to 100% when charged.