This is an Onyx 4.8V 4200mAh Sub-C Flat NiMH Receiver Battery with a Universal Plug.
Features:
Specs:
Capacity: 4200mAh
Number of Cells in Series: 4
Rated Voltage: 4.8V
Maximum Recommended Charge Current: 4.2A
Discharge Lead: 22AWG, 4.7" (120mm) not including connector
Pack Dimensions: 3.6 x 1.8 x 0.92" (92.5 x 47 x 23.5mm)
Weight: 9.5oz (270g)
Cell Size: Sub C
Includes:
1x Onyx 4.8V 4200mAh Sub-C Receiver Pack with Universal Plug
Requires:
Compatible Charger such as the Duratrax Onyx series