No memory effect The new DEWALT 5.0Ah XR Li-Ion battery packs will deliver 66% more runtime than a standard 3.0Ah battery pack Excellent electrical characteristics Protection against overheat, overload and deep discharge conditions increases battery life Compatible with all DEWALT XR Li-Ion 18V Tools Lightweight design provides the user with upgraded 5Ah Power without increasing the size or weight over the 18V 3Ah battery pack No memory effect and virtually no self-discharge for maximum productivity less downtime LED State of Charge Indicator helps manage pack charging