The MILWAUKEE M12 XC High Capacity REDLITHIUM Battery is designed with superior pack construction, electronics, and performance to optimize work per charge and work over pack life. It offers 4.0 Amp hours of runtime. With built-in Milwaukee durability, this battery runs cooler and performs in climates below 0°F/-18°C. Includes: (1) M12 Charger (48-59-2401), (1) M12 REDLITHIUM XC4.0 extended capacity battery pack (48-11-2440), (1) M12 REDLITHIUM CP2.0 compact battery pack (48-11-2420)