Milwaukee&174; 48-11-1840 M18 REDLITHIUM 4.0 AH Extended Capacity BatteryThe newest Milwaukee 18V Lithium-Ion Battery works on the M18 Cordless Tool System and has 4.0 Amp Hours of run-time. This battery powers over 40 Milwaukee M18 cordless tools. Milwaukee's M18 REDLITHIUM XC4.0 provides up to 2X more run-time, 20% more power and 2X more recharges than a standard Lithium-Ion battery. REDLITHIUM XC4.0 also delivers best-in-class performance in extreme job-site conditions. With Milwaukee- durability built into each pack, the REDLITHIUM XC4.0 battery operates cooler and performs in climates below 0°F/-18°C with fade free power.Features:4.0 Amp hour - 72 Watt hour batteryLITHIUM-ION battery delivers long life and run time with fade-free powerBattery fuel gauge - Displays remaining run-timeMilwaukee REDLINK IntelligenceOverload Protection - Prevents user from damaging their cordless power tool investment in abusive situationsTemperature Management System - Keeps battery in ideal temperature range to provide maximum lifeIndividual Cell Monitoring - Ensures optimal charge and discharge for maximum lifeDischarge Protection - Prevents cell damage from over-dischargeBest in class constructionIntegrated weld frameCell separatorImpact and vibration protective rubberFor use with Milwaukee M18 cordless toolsProduct Specifications BRANDMilwaukee- DESCRIPTIONExtended Capacity Battery VOLTAGE18 BATTERY CHEMISTRYLi-Ion (Lithium-Ion) MANUFACTURERS LIMITED WARRANTY YEARS3 PACKAGE QUANTITY1 TYPEPower Tool Battery MANUFACTURERS PART NUMBER48-11-1840 SERIESM18¢ BATTERY SIZEExtended Capacity # BATTERIES INCLUDED1 CHARGER INCLUDEDNo BATTERY AMP HOURS (Ah)4.0