Bosch DDS182WC-102 18-Volt Lithium-Ion Wireless Charging Kit with Brushless 1/2-Inch Drill/Driver, 1 Wireless Battery, Charger and Contractor Bag Brushless motor gives up to 2x the motor life and has superior efficiency for longer runtime and no maintenance Most powerful brushless compact drill driver in its class capable of performing the broadest range of heavy duty applications New wireless charging batteries charge anytime and anywhere without ever having to remove from your tool Unique CoolPack design gives the battery a special heat conductive housing that pulls heat away from inside the battery, keeping the battery cooler New high efficiency cells give the WCBAT612 up to a 65 percent more runtime versus 1.5 & 3.0 Ah battery packs