Milwaukee 48-11-1840 Rechargeable Battery Pack, 18 V Battery, 4 Ah

Delivers up to 2X more run-time, 20% more power and 2X more recharges than standard lithium-ion batteries. The M18 REDLITHIUM XC 4 extended capacity 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 4 Ah of run-time. With Milwaukee durability built-into each pack, this battery runs cooler and performs in climates below 0 deg F/-18 deg C. 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. The temperature management system and individual cell monitoring help maximize battery life. Switch to the REDLITHIUM 4 XC extended battery pack to instantly upgrade the run-time and durability of your Milwaukee M18 cordless tools.