Overview Model # 48-11-1815 Store SKU # 1000664036 The M18 18V Li-Ion Compact Rechargeable Battery delivers more run time, power and speed than standard Li-Ion batteries. This REDLITHIUM battery was designed with best-in-class pack construction, technology and performance for optimal work per charge and work over pack life. Use this 27W-hour battery to power more than 40 Milwaukee M18 cordless power tools. This versatility saves you money. Up to 40% more runtime, 20% more speed 20% more torque, and 50% more recharges Operates down to -18°C / 0°F and runs 20% cooler 1.5 Ah 27 W hour battery Battery fuel gauge displays remaining runtime Equivalent runtime 18V NiCad (compact) battery but with 40% less weight Discharge protection prevents cell damage from over-discharge