... Li-ion battery pack 4 cell Li-ion charger, battery chargerReverse polarity protectionSensing and following the battery voltageConstant output current to protect both battery pack and ... , CUL, GS, CE, BS, SAA, EK, PSE, CB, FCC, EMC, C-tick ,RoHS Input :100-240VAC, 50/60HzOutput voltage : 17 VDCOutput ... year Smart charger for 4 cell 3.7V Li-ion battery pack