Designed for Backfire Hammer Sledge, with the esc, power button, charging port all pre-installed in a fully sealed unit.  Backfire Hammer Sledge customers could use this unit for easy replacement. 

The discharge current of the Hammer Sledge is more than double that of the Hammer, and the battery capacity larger by 58%. The battery BMS and our exclusive BESC talk to each other to keep every ride powerful and exciting.

Equipment with 820wh, 18.5ah,  Lipo Battery with Smart BMS

Charging Voltage: 50.4V, 5.0A

Connecting Plug:  XT90