... USB function 3. Charging for i-phone,i-pad,i-pod,MP3,MP4,GPS ,cell phone,bluetooth device ,some tablet ... , integrates R&D, production and marketing of mobile phone lithium ion battery, polymer lithium ion battery, LiFePO4Battery ... in the near future.Our products:1)mobile phone battery2)18650 lithium ion battery & battery pack3) ... tour: High capacity 7800mAh portable charger for mobile phone,mp3,mp4