Can I replace my gas mower with a cordless version?
The main benefits to owning a cordless mower are convenience and quieter operation. You don't have to worry about storing gas, changing oil or tuning up the mower. You won't struggle with starting the mower or have to worry about old gas gumming up the carburetor. And since they're quieter than gas mowers, you can mow in the morning or later in the evening without disturbing your neighbors.
But you're probably wondering if a cordless mower would work for you. The answer is maybe. It depends on the size of your lawn and how much time you want to spend mowing it. Manufacturers claim that most of these mowers will run between 25 and 45 minutes and can cut between one-quarter and one-third of an acre on a fully charged battery. An average city lot is between one-tenth and one-quarter of an acre, so folks on these properties can finish mowing on one charge. If your lawn is larger than about one-third of an acre, then you would need to divide the mowing to allow time to recharge the battery, or keep an extra battery on hand.
Another consideration is how high you let the grass get between mowings. If your idea of mowing the lawn is more like cutting hay, then you should stick with a gas-powered mower. Battery-powered mowers can cut thick grass, but it puts a lot of strain on the battery and electric motor. The batteries will run down quickly under this kind of load, and lithium ion batteries may heat up, causing the circuitry to momentarily turn off the battery to preserve it. The bottom line is that if you own a cordless mower, you'll have to be a little more vigilant about cutting the grass before it gets too long.