Lightly Used Kobalt 80-Volt Max Brushless 21-in Self-Propelled Cordless Electric Lawn Mower. Priced $600 elsewhere. Battery and charger included. Up to 80 minutes run time on a fully charged battery. Collapsible handle allows for convenient storage just about anywhere. 3 cutting options. Auto-sensing technology automatically adjusts motor performance for greater power or run time based on changing grass conditions from area to area.