technical specification:- 1.Charger Parameters :- Rated Input Voltage,AC110-220v 2.Voltage Frequency :- 50Hz-60Hz 3.Output :-DC 5.4V 4. Environment Temperature :- -10C, +45 C 5.Working Time :- Low light 9 hours,max light 5 hours, 6.Charging Time:- 8-10 Hours