A:AnswerI wouldn't keep mine in the care. I don't know if it's safe or not, but I live in a very hot, humid city and I would be afraid of the heat and humidity doing it damage. I bring mine in with me each night.
A:AnswerTake the cable which came with the battery. Plug the small end into the battery and the USB end into a USB power source (computer, wall plug). When all the lights are solid, it's 100% re-charged.