Originally Posted by Bookworm_Girl
Did you have Wi-Fi on? Sometimes if there is an internet failure overnight or intermittent Wi-Fi it can drain the battery fast because it's continuously searching for a good connection.
I had WiFi on when this happened. I charged the battery completely and turned WiFi off. It seems to be acting normal, it's been a couple of days and the battery is at 94%. Seems the WiFi was still on even though it was on sleep mode.