This is an Onyx 4.8V 2000mAh AA Square Receiver NiMH Battery Pack with a Universal Plug.
Features:
Specs:
Capacity: 2000mAh
Number of Cells in Series: 4
Rated Voltage: 4.8V
Max Charge Rate: 2.0A
Discharge Lead: 22AWG, 4.7" (120mm) long not including connector
Pack Dimensions: 2.0 x 1.1 x 1.2" (51 x 29 x 29mm)
Weight: 3.9oz (110g)
Cell Size: AA
Includes:
1x Onyx NiMH 4.8V 2000mAh Square Receiver Battery Pack with Universal Connector
Requires:
Compatible battery charger