Smart charger for 4 cell Li-ion battery pack 4 cell Li-ion charger, battery chargerReverse polarity protectionSensing and ... CE, BS, SAA, EK, PSE, CB, FCC, EMC, C-tick ,RoHS Input :100-240VAC, 50/60HzOutput voltage : 17 ... Min.Operating temperature: -29-45.5 CStorage temperature: -40-75 COperating relative humidity: 5%95% RHOver load protection: ... 2 year Smart charger for 4 cell 3.7V Li-ion battery pack