Enegitech Battery For Milwaukee M18 18V XC 5.0Ah High Capacity Red Lithium Cordless Power Tools 48-11-1840 48-11-1850 A long-lasting performance and durability Red Lithium XC 5.0 Battery offers fade-free power Battery features overload protection and optimized performance,battery and charger Equivalent run-time,Integrated weld frame, Cell separator, Impact and vibration protective rubber One-year limited warranty