The DCD999 DEWALT 20V hammer drill gets up to 42% more power** when paired with FLEXVOLT batteries Both cordless hammer drills are compatible with all DEWALT 20V MAX* and FLEXVOLT Batteries 20X BRIGHTER LED: The DCD999 3-mode LED provides lighting in dark or confined spaces up to 20x brighter than the DEWALT DCD985 EXTENDED WORK TIME WITH LED: The DCD999 features an LED spotlight mode features 20 minute shutoff function allowing for extended work time in dark or confined spaces VERSATILITY: The DCF887 has application versatility with 3-speed settings ADDED CONTROL: The DCF887 helps prevent over-tightening fasteners with added control from Precision Drive in speed 1 setting VISIBILITY: The DCF887 creates visibility without shadows from 3 LEDs with a 20-second delay after trigger is released COMPATIBILITY: The DCB1106 6 Amp Charger is compatible with 20V MAX* batteries and FLEXVOLT 20V/60V MAX* batteries. DCD999 is Tool Connect Chip Ready: Chip pocket accepts Tool Connect Chip DCE042 and connects with Tool Connect Site Manager app for easy asset management on the jobsite. (DCE042 sold separately)