DEWALT XR POWER DETECT 1/2-in 20-volt Max Variable Brushless Cordless Hammer Drill (1-Battery Included) Model #DCD998W1 The new range of DEWALT 20V MAX XR tools with power detect tool technology maximize performance when used with high-capacity XR batteries. Using the 20V MAX 8Ah battery, the drill will output up to 29% more power and get 60% more runtime than the standard XR drill. Using the DCB208 20V MAX 8Ah battery will output up to 29% more power The DEWALT DCB208 8Ah battery provides up to 60% more capacity than the DEWALT DCB205 5.0Ah battery DEWALT-built high power, high efficiency brushless motor delivers up to 57% more run time over brushed The DCD998 hammer drill has 3-speeds, high performance, all-metal transmission to optimize tool-to-task for fast application speeds and improved run-time for drilling in masonry materials Heavy-duty 1/2-in ratcheting vitro-carbonized metal chuck with carbide inserts for superior bit gripping strength 3-Mode LED provides lighting in dark or confined spaces up to 20x brighter than previous model LED spotlight mode features 20 minute shutoff function allowing for extended work time in dark or confined spaces Maximum initial battery voltage (measured without a workload) is 20 volts; Nominal voltage is 18 The DEWALT DCD998 with a DCB208 20V MAX 8.0Ah Battery has up to 29% more power versus the DEWALT DCD996 with a DCB205 20V MAX 5.0Ah Battery