Dewalt 20V/60V MAX FLEXVOLT 12 Ah Lithium-Ion Battery - DCB612. Compatible with 20V MAX, 60V MAX, and 120V MAX tools. 12 Ah capacity for maximum runtime. Compatible with all 20V MAX Chargers. 3-LED Fuel Gauge charge indicator. Operates in outside temperatures down to 0 Degrees Fahrenheit. Note: The battery amp hour when used with 60V MAX DEWALT tools will be 4 Ah. If used with a 20V MAX DEWALT tool, the amp hour will be 12 Ah.Total single battery watt hour will be 240 WH