18V, Compact LXT Lithium-Ion Cordless 1/2" Driver Drill Kit, Lithium-Ion Battery With The Best Power-To-Weight Ratio At 450 IN LBS Of Torque & Weighing Only 3.5 LBS, Makita Built, 4-Pole Maximum Torque Motor Delivers 450 IN LBS Of Efficient Torque In A Compact Size, More Compact Design At Only 8" Long & Weighs Only 3.5 LBS, For Less Operator Fatigue, Batteries Charge 4 Times Faster In Only 15 Minutes, Ergonomic Shape Fits Like A Glove With Even Pressure & Easy Control, Makita Lithium-Ion Provides Longer Run Time, 5 Times Lower Self-Discharge For Use Any Time &16 Firm Holding Contact Terminals For Constant High Power, 15 Minute Rapid Optimum Charger & Battery Communicates Throughout The Charging Process Using The Built-In Chip In The Battery & Built-In CPU Chip In The Charger, The Charger Also Uses "Active 3 Control" For Current Control, Thermal Control & Voltage Control, 15 Minute Rapid Optimum Charger Has A Built-In Fan To Cool The Battery To Produce More Lifetime.