Milwaukee M18 REDLITHIUM XC 4.0 Extended Capacity Battery-Pack

Delivers up to 2X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries. The M18™ REDLITHIUM™ XC 4.0 Extended Capacity Battery Pack features superior pack construction, electronics and performance to deliver more work per charge and more work over pack life than any battery on the market. It offers 4.0 amp-hours of runtime. With Milwaukee durability built into each pack, this battery runs cooler and performs in climates below 0°F/-18°C.