"Get more power with the 20V MAX* brushless tools featuring DEWALT FLEXVOLT ADVANTAGE technology. This Cordless Hammer Drill has a 1/2-inch chuck and provides up to 42% more power when used with a DCB606 FLEXVOLT Battery compared to a DCB205 20V MAX* 5.0Ah Battery. Please note that the battery and charger are not included and must be purchased separately."