With this battery-powered mower, there are no cords to hassle with -- just charge and mow. The lithium-ion batteries maintain consistent power for the entire run time of the battery; power doesn't fade. Lasts up to 40 minutes of continuous mowing. Uses dual 40-volt batteries (one each 40-Volt 4 AH and 40-Volt 2 AH). Includes batteries and charger. Made by Earthwise®, known for high-quality, earth-friendly lawn and garden tools.