The short answer is they prefer not to. Electric mowers are like the electric hair trimmer the barber uses as he’s putting the finishing touches on your summer haircut. The scissors do the heavy cutting first. The electric clippers come in at the end and finish out the shorter hair. Electric mowers are more of a supplemental maintenance tool. They like to cut regularly mowed lawns and take off the extra one-third of the blade that has grown since your last mow. There are ways to help your electric mower along if the grass has grown a little high: Raise the mower height, tilt the mower on the back wheels, or take those sections at a slower speed.