Believe the hype. Our 2xV20* BRUSHLESS RP™ 21" Rear Wheel Drive Self Propelled Mower is a game-changer, no matter which way you cut it. (Heh.) *20V MAX** battery, maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18. #CRAFTSMAN #CRAFTSMANTools #DIY #Mower #Lawnmower #V20 #Electric #BatteryPower #Outdoor #Landscaping #BuildOn