Bosch 18 Volt 2 Pack 2 Amp Hour Lithium Power Tool Battery Lever and Deadbolt Combo saving up to 93% over Door Lock Installation Kit saving up to 93% over its lifetime when used in place of a traditional 60 watt incandescent gARB265Wcent light bulbs A: Home Depot lists 13 pieces per case (6 battery CoolPack Technology – keeps battery cooler for up to twice battery lifetime Single cell monitoring – maximizes the performance of each individual cell for longer runtime Electronic monitoring systems – protects both tool and battery for long tool life Integrated LED fuel gauge – displays battery's state of charge Cold weather operation – works in temperatures down to 4 ° F System compatibility – operates with all Bosch 18 V Lithium Ion tools and chargers as part of the Flexible Power System Convenient two pack set – supplies two Bosch 18 V Lithium ion batteries designed for provide continuous cordless power on the jobsite with a lighter battery Efficient size – provides 18 V power and 2