Designed for Backfire Ranger X3, with the esc, power button, charging port all pre-installed in a fully sealed unit.  Backfire Ranger X3 customers could use this unit for easy replacement.  

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

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

Connector: XT60