Flylinktech Replacement Battery For Milwaukee M12 Cordless 12 Volt Red Lithium Ion Milwaukee 48-11-2411 48-11-2401,48-11-2402,C12 B,C12 BX Brand New | Li-ion | 12 Volts |1500 mAh | Black and Red. Provides optimized performance and overload protection. Fuel gauge onboard: Displays remaining runtime for less downtime on the job. All-weather performance: Delivers power in extreme jobsite conditions. Built in high quality battery cells,No effect on the battery,Charging at any time.