The FLEXVOLT® 20V/60V MAX* 12.0 Ah battery provides up to 8X runtime** (**With DCB612 FLEXVOLT® battery when used with DEWALT 20V MAX* tools compared to DCB201 1.5 Ah battery pack.) in 20V MAX* and delivers ultimate power in 60V MAX* and 120V MAX* cordless tools*. It changes voltage when you go from 20V MAX* to 60V MAX* tools. Lithium Ion technology delivers performance in the same size as our 9.0 Ah battery, so it is more powerful in as compact a package as possible. It also includes a built-in LED Fuel Gauge for instant charge status, and is compatible with 20V MAX* tools and chargers.