Rechargeable Handwarmer - Large The dual purpose USB-C rechargeable Hand Warmer and Power Bank by THAW is built to keep you warm and your USB powered devices charged. With double-sided heat, your hands will stay toasty no matter what the elements throw at you. The USB-C rechargeable, portable device will keep you warm whether youre high up in the mountains hitting the slopes or simply out for a walk in the middle of winter.