XR on the tool refers to the motors being brushless which are more efficient and that equals better battery life. The XR line of batteries according to DeWalt last 33% longer than the 20v “max” line of batteries of the same size. XR tools and XR batteries are two totally different things.Click to see full answer. Accordingly, are Dewalt 20v MAX batteries interchangeable with XR?Dewalt has launched their new 20V Max “XR” DCB204 lithium ion battery pack, which offers a 4.0Ah charge capacity. The new XR 4.0Ah battery packs feature built-in fuel gauges and can be used with any Dewalt 20V Max tool or charger.Secondly, which is better Dewalt XR or atomic? XR line is the best. Atomic is aimed at being lighter, and they’re not as powerful. The DCF 887 or 888 are the best impacts from dewalt right now. Just so, what does the XR mean on Dewalt? TOWSON, MD – DEWALT announces the launch of its new 20V MAX* premium brushless drills with Extreme Runtime (XR). The DCD995 hammerdrill and DCD990 drill/driver deliver premium power when completing demanding drilling and fastening applications.What is the difference in Dewalt 20 volt batteries?DeWalt 20v MAX XR batteries are just like standard 20-volt batteries, but they last longer relative to their size. The XR stands for Extended Runtime, so you get extra life out of them before running out of juice.