The MILWAUKEE® M18™ REDLITHIUM™ FORGE™ XC8.0 Battery Pack delivers HIGH OUTPUT™ 12.0 power in a smaller size and the longest life vs REDLITHIUM™ batteries. REDLITHIUM™ FORGE™ are Milwaukee's most powerful, fastest charging, and longest-life batteries. The M18™ REDLITHIUM™ FORGE™ XC8.0 delivers 8 amp hours of runtime with the same power as the M18™ REDLITHIUM™ HIGH OUTPUT™ HD12.0, in a smaller size and lighter weight design. This lithium-ion battery has the longest life, the most recharges, and the best performance over the life of the battery. It is also designed with resistant housing for increased protection against exposure to common oils, greases, and solvents. REDLINK™ Intelligence protects the battery from overloads, preventing you from damaging your cordless power tools in heavy-duty situations. When paired with the M18™ Dual Bay Simultaneous Rapid Charger, this battery charges in just 83 minutes to 100%. The M18™ Dual Bay Rapid Charger can charge two (2) batteries simultaneously.  The M18™ REDLITHIUM™ FORGE™ XC8.0 battery is fully compatible with 275+ M18™ solutions and the M18™ Dual Bay Rapid Charger charges all M18™ batteries.