Delivers up to 2X more runtime, 20% more power and 2X more recharges than standard Lithium-ion batteries. The M18™ REDLITHIUM™ 2 compact battery pack features great 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 2 Ah of runtime. With Milwaukee® durability built into each pack, this battery runs cooler and performs in climates below 0 deg F/-18 deg C. Its compact, lightweight design fits in tight work spaces and reduces user fatigue. Managed by Milwaukee®'s exclusive RedLink™ intelligence, the battery features overload protection to prevent you from damaging your cordless power tools in heavy-duty situations, while the discharge protection prevents cell damage.