Battery connector: MX2.0 Plug, or called molex plug Dimensionis: 32.3*18*8mm/1.27*0.71*0.32inch, Net weight:7.8grams/0.275oz. Voltage:3.7V 1 cell, Capacity:300mAh, material: Lithium-polymer, Discharge rate:25C.
Charge SPEC: Input: 5V 2A (USB), Output: 4.2V 500mA*4, 4 charge port, it can charge 4 battery at same time. Charge manual: Red light is solid when charging, red light is off after full charged.