Dynamite "Speedpack2" 6-Cell Flat NiMH Battery with EC3 Connector.
Specifications:
Connector Type: EC3
Cell Configuration: Flat
Battery Voltage: 7.2V
Battery Capacity: 3000-3999mAh
Battery Type: NiMH (1.2V per cell)
Number of Cells: 6
Product Length: 7.75" (197 mm)
Product Height: 1.15" (29 mm)
Product Width: 2.11" (54 mm)