Ridgid AC82049 Genuine OEM Compact Hyper Lithium Ion 2.0 Amp Hour 12V 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) COMPATIBILITY: This battery is compatible with Ridgids 12 Volt battery powered tools and chargers, making this a perfect backup or replacement COMPACT: This batterys low weight and small size makes this ideal for tools and jobs that require precise handling. Make accurate cuts and decrease your fatigue at the same time HYPER LITHIUM ION POWER gives you up to four times the power of equivalent batteries from competing brands