Features:DeWalt XR 4.0Ah Li-Ion Battery Technology offers extended runtime and optimised power to complete applications quicklyLED State of Charge Indicator helps manage pack chargingLightweight design provides the user with upgraded 4Ah Power without increasing the size or weight over the 18V 3Ah battery packNo memory effect and virtually no self-discharge for maximum productivity & less downtimeCompatible with all DeWalt XR Li-Ion 18V ToolsExcellent electrical characteristicsNo memory effectPack of 2Specification:Battery Capacity: 4.0 AhVoltage: 18VHeight: 65mmLength: 110mmWeight: 0.61kgCompatible with: All 18V XR Li-Ion DeWalt tools