The DEWALT 18 Volt DCB18 XR Slide Li Ion Battery Packs are fitted with technology that offers extended run time and optimised power to complete applications quickly. The battery has no memory effect and virtually no self discharge for maximum productivity and less downtime. They are also fitted with an LED state of charge indicator that help to manage charging times. Compatible with all slide on DEWALT Li Ion 18 Volt Tools.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. They have protection against overheating, overloading and deep discharge conditions which increases the overall battery life. Compatible with all DEWALT 18 Volt tools that except slide on type batteries.