Sanyo Eneloop AA x 4

Battery Size : AA
Battery Type : Nickel-Metal Hydride Battery
Nominal Voltage : 1.2 V
Capacity : 2000 mAh
Charging Current x Time: 2000mA x 1.1h
Charge Condition: 0°C - 40°C
Internal Impedance: Approx. 25mΩ(at 1000Hz)