Earlier this week I had mine go from 100% to 4% overnight followed by 100% to 1% overnight. This was after a couple of weeks with no issues. Did a reset and they now drop from 100% to 99% overnight. All drops while in the case. Been using them for many hours every day. On the iPhone, IPad, MacBook, working at my desk, around the house... very versatile and solid performance. These things are like computers. The occasional reboot helps performance. I am confident Apple will continue to improve the software. Extended holiday return date ends today. I will be keeping mine.