... control the constant voltage.4,Auto protection function:overcharge,over discharge,overload,reverse connection,short-cercuit will be protected ; lighting protection and ... IPOD,DV etc digital products.9,Charging time(with proper AC adapter):3~4hours10,Working time(battery is ... , yellow, blue, green Size and weight140*88*23 mm,NG:281G,GW:703G 5200mah monocrystal silicon portable smartphone solar charger