This is the HPI Plazma NiMH 6.0V 4300mAh hump receiver battery pack.
Includes: Plazma NiMH 6.0V 4300mAh Hump Receiver Battery Pack with Tamiya and Futaba Plug
Requires: NiMH compatible charger such as the Duratrax Onyx series
Number of Cells in Series: 5
Rated Voltage: 6.0V
Weight: 12.2oz (345g)
Pack Dimensions: 2.6x1.6x1.8 (67x42x45mm)