Metabo BS18 LTX 4.0 Cordless, Drill, Driver, 18-volt, Li-Ion Battery, 4.0 Extreme Battery With 4.0 Ah battery pack for 33% longer operating time per charge Maximum torque, 850 in-lbs Weight (including battery pack) 4.4 lbs 3 year battery pack warranty Precision Stop: Torque coupling with precise electrical switch off to ensure extremely long lifetime for the tool