BLACK+DECKER LST220 20V Lithium Ion Cordless GrassHog Trimmer/Edger, 12" Easily converts from trimmer to edger with a quick turn of the shaft Powered by 20-volt MAX lithium-ion battery, with longer lifespan and charge retention than NiCad batteries PowerDrive Transmission delivers more power from the motor to the cutting string Automatic Feed Spool ensures continuous work without bumping 2-year limited warranty; includes battery and Energy Star-qualified charger