The Bosch 18V Lithium-Ion line of Cordless Hammer Drill/Drivers use the industry's most advanced lithium-ion technology for greater battery life and more run time, all in a lighter package. Built tough, the Bosch HDDB180-02 18-Volt 3/8-in. Compact Lithium Ion Hammer Drill/Driver with Two Slim Pack Batteries is a durable, powerful, and compact tool for high-quality results. Featuring Durashield housing to guard against wear and tear, the HDDB180-02 utilizes an 18-volt Lithium Ion battery, which provides 35% more runtime and two times the recharge cycles of its competitors. This is the most compact and lightweight design available to provide the user with the least amount of fatique.