A petrol lawn mower is a durable power tool commonly used for bigger lawns and farms. Meanwhile, a cordless lawn mower is a battery-powered tool that is more intended for smaller turfs. Since it doesn't need oil to operate, it's also cheaper to run than petrol mowers. The lightest type available, an electric lawn mower works using electricity. Without the need for batteries or an oil refill, it can keep running as long as it is plugged into a power socket.