Effective protection against overload, overheating, and deep discharge through special electronics in the battery unit. Very low weight and ultra-compact dimensions. Optimal for tough construction site use due to shatterproof housing and shockproof soldered battery cells. Charge level indicator with 3 LEDs (at the touch of a button). Suitable for all 18-volt XR cordless machines from DeWalt and all DeWalt XR cordless machines with 54 volts as well as 18 volts (except Tough-Radio).