Battery Type: Lithium-Ion; Battery Voltage: 3.7V; Battery Capacity: 1300mAh. The charger Input: AC 100~240V 50~60Hz; Output: DC 4.2V 600mA. No memory effect, can be charged or discharged at anytime. Perform as good or better than the top branded batteries on the market. The AC wall charger with foldable flat pin for easy storage. Comes with a 12V Car Lighter Adapter, enables you to charge easily when outside. Built with smart technology that protects against short circuiting, over-charging and over-heating.