This is the HPI Plazma NiMH 6.0V 1600mAh hump receiver battery pack.
Features:
Includes: Plazma NiMH 6.0V 1600mAh Hump Receiver Battery Pack with BEC Connector
Requires: NiMH compatible charger
Specs:
Capacity: 1600mAh
Number of Cells in Series: 5
Rated Voltage: 6.0V
Weight: 4.1oz (117g)
Pack Dimensions: 2x1.3x1.4 (50.5x33.5x35mm)