The MILWAUKEE(R) M12(TM) XC 4.0Ah Battery 2-Pack is compatible with all Milwaukee M12(TM) cordless tools and instruments. The M12(TM) REDLITHIUM(TM) XC extended-capacity battery delivers 4Ah (48 watt-hours) of runtime, even in sub-zero temperatures. Each 12-volt lithium-ion battery features new-age REDLINK(TM) circuitry engineered to prevent overloads and protect against cell-damaging discharge. Revolutionary cell monitoring and temperature regulation prolong this battery's operation and life expectancy, meaning fewer work interruptions and more recharges than ever. Professionals depend on heavy-duty, long-lasting performance, which Milwaukee delivers with this 12-volt battery pack. | Milwaukee Tool 2-Pack M12 REDLITHIUM XC4.0 Battery 48-11-2442