The MILWAUKEE M12 XC Top Capability REDLITHIUM Battery is designed with superior pack construction, electronics, and function to optimize work per charge and work over pack life. It gives 4.0 Amp hours of runtime. With built-in Milwaukee sturdiness, this battery runs cooler and performs in climates beneath 0°F/-18°C. Comprises: (1) M12 Charger (forty eight-fifty nine-2401), (1) M12 REDLITHIUM XC4.0 extended Capability battery pack (forty eight-eleven-2440), (1) M12 REDLITHIUM CP2.0 compact battery pack (forty eight-eleven-2420)