... 2.5hrs Battery: Lithium Polymer Battery 1800mA Charging: USB Flexibility: low temperature, high temperature - Feature:Small, beautiful, fashion.Easy to carry, and USB ... :There are three buttons, 0 for OFF, .for low temperature, .for high temperature.When the warmer is ON, then the LED indicator ... it and place in a dry place.During use and storage, if the warmer appear abnormal phenomena such as smelly, ...