I stumbled across your post about your batteries and how they changed charge and usage times. I have a xtar 1 slot mini and the same happened to me. Just by dumb luck I noticed that the two different usb cords I used was the difference. Thinner cheaper looking caused shorter times. The thicker usb cord caused longer time
Had to keep this short. If you need more info you can ask.
Had to keep this short. If you need more info you can ask.