... backpack charger Parameters:1. Name: 2013 Emergency portable solar backpack charger 2. Solar panel: 6V 200MA3. Material: 1680D4. Size: 21X9X20CM5. 4 ... cameras, digital learning machine, MP3, MP4, PSP game consoles, portable DVD, etc. Kinds of power supply for your selection:Accessories ... please use the external power supply local battery for charging.2. Can not go beyond the voltage range of charge, ...