Cordless lawn mowers have come a long way in recent years. They used to be little more than glorified weed whackers, but now they can handle thick, tough grass with ease. In fact, many cordless models can cut grass that is up to 12 inches tall. So, if you have a lawn that is getting a little out of control, a cordless lawn mower should be able to handle it without any problem. Just make sure to get a model with a powerful battery and sharp blades, and you'll be able to keep your lawn looking neat and tidy all season long.