Bosch 18-Volt 2 Amp-Hour Lithium Power Tool BatteryMaximum run time up to 65% more run time (compared to Bosch 1. 5 Ah) Unique CoolPack Design advanced heat conductive housing keeps battery cooler, lives up to 2x longer Integrated fuel gauge for fast and easy charge status Cold weather operation battery will work down to 4 F Durable housing survives 3 m drop Flexible Power System (FPS) works with all Bosch 18 V Lithium Ion power tools, radios and more Features Charge Time (Hours) 0. 5 Wireless No