Take advantage of more power with the 20V MAX* brushless tools with DEWALT FLEXVOLT ADVANTAGE tool technology. This 1/2 in. Cordless Hammer Drill HAS Up to 42% more power** when paired with FLEXVOLT batteries and is compatible with all DEWALT 20V MAX* and FLEXVOLT Batteries. The DCD999B also has a 3-mode LED to provide lighting in dark or confined spaces, with Spotlight Mode that features a 20-minute shutoff function, allowing for extended work time in dark or confined spaces.