The Bosch hammer drill/driver kit includes two CORE18 V batteries. The kickback control automatically shuts the tool down when a torque reaction occurs in a bind-up scenario. The hammer drill has a 25+1 precision clutch, an upgraded all-metal chuck, and an EC Brushless motor that delivers up to 663 In.-lbs. of torque. Each battery uses next-gen Li-Ion technology to produce 80% more power than previous batteries.KickBack Control in drill – reduces risk from sudden rotational torque reaction in a bind-up scenarioHigh-power CORE18 V cells – produce 80% more power than previous-gen batteriesEnhanced CORE18 V battery design – provides up to 20% longer runtime than previous-gen 6.0 Ah batteriesPrecision clutch on hammer drill – features 25+1 settings for driving accuracy and reduced fastener damageFast Charger – charges the CORE18 V to 80% in 41 minutes and to 100% in 55 minutesUpgraded all-metal chuck – delivers more durability, along with first-rate bit retentionEC Brushless motor – produces efficient power in hammer drill/drivers, along with 663 In.-Lbs. of torque and outstanding runtimeBrute Tough drill design – provides a compact head-length and plenty of powerSure-grip side-assist handle – helps prevent the hammer drill from slipping to increase control during use