Ridgid Genuine OEM AC840086 18V 2AH Hyper Lithium-Ion Single Battery COLD WEATHER PERFORMANCE: These batteries can work in temperatures as low as -4 degrees Fahrenheit (-20 degrees Celsius) PROTECTIVE ENGINEERING: The layout of the fuel cells inside the battery are designed to help protect the battery from overheating, overloading, and overcharging ONBOARD FUEL GAUGE lets you know how much power is left on the battery. Now you can know when youll need to recharge COMPACT DESIGN allows for greater maneuverability with your power tools compared to the bulky 4 Amp Hour equivalents TECHNICAL SPECIFICATIONS: 2AH, 18V Lithium Ion, Recharge Range of 32F - 120F (0C - 50C), 72Wh