The Makita BDF451 is a Factory Reconditioned 18V 1/2 inch LXT Lithium-ion Driver-Drill Kit. The Makita BDF451s LXT Lithium-Ion battery and optimum charging system produces 280% more lifetime work with 2x more cycles. The Makita built, 4-pole maximum torque motor delivers 560 in-lbs of torque in a compact, portable size. The compact design of the Makita BDF451 is 9-3/8 inch in length and weighs only 4.6 lbs. The Makita BDF451s ergonomic shape fits like a glove providing even pressure and easy control. A 45-minute Optimum Charger and battery communicates throughout the charging process using a built-in chip in the battery and a built-in CPU chip contained in the charger itself.