Professional Battery Management System (BMS) with provides multiple protections for over charge, over discharge, short circuit, over voltage, over-current and over heat. Compatible with Coredy R300, R500, R550, R580, R650, R3500, R3500S, Amarey A800, A900, Goovi D380, Onson J10C Robot Vacuum Cleaners. 14.4v 2600mAh are same with original voltage and battery capacity. 3 prongs with 2 wires and same size compare with original battery.