The dewalt dcf886d2 is the latest generation of brushless impact driver to feature the new xr 20ah li ion technology its brushless motor means an improved runtime and increased durability so you can keep working for longer the 2 20ah lithium ion batteries have a state of charge indicator so you know exactly when to re charge your packs making planning jobs much easier there is a 3 led halo light ring that provides excellent illumination of the work piece in confined or dark spaces the