... Working PrinciplesThis portable digital device mobile charger adopts high-performance lithium battery, with capacity of 1100mAh. This unit can charge various ... player, MP4 player, PMP, PSP, PDA etc. To charge this unit via computer USB port, solar energy or matching charger ... , novel gift, business gift or other usage. 2013 New mobile Solar charger Li-ion rechargeable battery 500mah mini Solar charger ...