If there were anyway to make an electric lawn mower that people would buy, they would. Did you read the article concerning the Volt? Estimated cost per vehicle is well over $100,000. This is the result of best engineering bailouts can buy. How much are you willing to spend on a lawnmower? 2K, 3K what? Next what do you do with the old batteries? What fuel do you use to charge the batteries? The Volt gets approximately 100 miles to a charge. Charging costs about $4 at $.10 /KWHr. = $.04 /mile. Even at this low rate, there is still buyer resistance.