Kastar replacement battery. High quality and manufacture price. Battery Type: Lithium-Ion; Battery Voltage: 3.7V; Battery Capacity: 1300mAh. Kastar ultra slim charger, easy to carry, come with a Micro-USB cable. The charger Input: 5V 1A~2A; Output: DC 4.2V 600mA. LED indicate: Red light for charging; Green light for standby or full-charge. Micro-USB input, come with a Micro USB cable.