Battery Specification: Battery Type: Ni-MH; Battery Voltage: 3.6V; Battery Capacity: 1650mAh; Battery Dimensions: 50.29 x 42.4 x 14.37mm (1.98' x 1.67' x 0.57'). The charger can charge 2 batteries at the same time. Input: 5V 2-3A; Output: 8.4V/4.2V 800mA(x1) 800A(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. Package Includes: 4-Pack Batteries + 1 LTD2 USB Charger.