The DEWALT DCB184 5.0Ah XR Li-Ion battery packs will deliver 66% more runtime than a standard 3.0Ah battery pack. They have an LED state of charge indicator to help manage pack charging. They have a lightweight design that provides the user with upgraded 5.0Ah Power without increasing the size or weight over the 18 Volt 3.0Ah battery pack. No memory effect and virtually no self-discharge for maximum productivity and less downtime.