Kastar brand replacement battery. Long lasting and manufacture price. Battery Type: Lithium-Ion; Battery Voltage: 3.7V; Battery Capacity: 1550mAh. This Kastar battery charger with foldable flat pin for easy storage. The charger Input: AC 100~240V 50~60Hz; Output: DC 4.2V/8.4V 600mA. LED indicate: Red light for charging; Green light for standby or full-charge. The AC charger kit includes: 1 charger, 1 car adapter and 1 European plug.