Metabo 18V 4-1/2" Angle Grinder Bare COMPLETE PORTABILITY: Eliminate the cord, not the power The advanced and intelligent cordless technology, featuring AIR-COOLED charging, Electronic Single Cell Protection, Overload protection 4-LED CAPACITY INDICATOR: Shows battery charge status PATENTED AIR-COOLED CHARGER: Quickly cools battery allowing for up to 30% faster charge times while significantly increasing battery life OVERLOAD PROTECTION: Built in overload protection on both the tool and battery, guard against overheating, significantly increasing the life