Battery Type: Lithium-Ion; Battery Voltage: 3.7V; Battery Capacity: 1700mAh. Can charge 2 batteries at the same time; Can change the plate to charge different batteries. Easy to carry, the Charger Input: 5V 2-3A 15W; Output: 4.2V 800mA(x1) 800mA(x2). Intelligent LED USB dual charger displays charging status and battery capacity. Multiple charging option, Micro-USB input and Type-C input, come with a Micro USB cable.