The NEW lightweight Dewalt DCB184 Li-Ion battery pack offers extended runtime and optimised power, providing the user with upgraded 5.0Ah power with no weight increase in comparison to the 4.0Ah battery packs. With no memory effect and virtually no self-discharge, it offers maximum productivity and helps to decrease downtime. Compatible with all DeWalt XR Li-Ion 18v cordless power tools, the DCB184 has excellent electrical characteristics and will make a great addition to your Dewalt cordless tool collection.