Ridgid R82059 Genuine OEM Hyper Lithium 4 Amp Hour 12 Volt Battery FADE-FREE POWER: This battery will work at full power until its fuel has completely run out, letting you work as hard as you can for as long as you can COLD WEATHER OPTIMIZED: This battery has unique design features that allow it to work in temperatures as low as -4 degrees Fahrenheit (-20 degrees Celsius) FLAT BASE allows you to keep your tools standing straight up, whether its a flashlight or impact driver, for easier storage COMPATIBILITY: This battery is compatible with Ridgids 12 Volt battery powered tools and chargers, making this a perfect backup or replacement HYPER LITHIUM ION POWER gives you up to four times the power of equivalent batteries from competing brands