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

Equipment with 123P 21700 High Performance Cells, 518wh (Updated to Samsung 40T 21700 cells since March 2023). 

Charging Voltage: 50.4V, suggested to use Backfire 2.5A charger or 4.0A fast Charger.

Connecting Plug:  XT90