Black & Decker CM1936 36-Volt Cordless Electric Lawn Mower for $399.99 shipped. Here is a screenshot for your reference. This cordless electric lawn mower has a removable 36V battery for cutting lawns up to 1/3 acre. The removable battery enables use of additional batteries for cutting larger properties. It also features 1-touch adjustment to change height on all 4 wheels simultaneously. Most places have it for about $429.