... 500 times, Isolated structure between battery and heating device for absolute safe •*The first company and brand of drafting ... Standard about Lithium-ion Hand Warmer, 100% safe *•Pocket designed,convinient for travel* •Intelligent Temperature Control System, Supplying Pulsed-type ... , high charging transformation rate, it can charge iPhone4 fully for 1.5 times *•Fast charging, about 2 hours charging ...