Smaller and lighter than NiCd compact batteries, yet delivers long runtime and fade-free power. The M12™ REDLITHIUM™ Battery is designed with superior pack construction, electronics and performance to optimize work per charge and work over pack life on the jobsite. This battery is 65% lighter and 50% smaller than compact NiCd batteries and offers 1.5 amp-hours of runtime. With built-in Milwaukee durability, it runs cooler and performs in climates below 0°F/-18°C.