Milwaukee 2646-21CT Cordless 2-Speed Grease Gun Kit Battery - Replacement Milwaukee 18V Battery (1500mAh, Lithium-Ion) Replacement Milwaukee 2646-21CT Cordless 2-Speed Grease Gun Kit Battery Replacement for Milwaukee 18V Lithium-Ion Power Tools Batteries One Year Warranty Capacity: 1500mAh, Upstart Battery Brand On Sale for a Limited Time!