The RMA 510 V self propelled lawn mower gives homeowners the performance of a petrol powered mowers without any of the hassles. Enjoy instant starting, less noise and zero exhaust emissions. It features a 21" deck, so you can cover more lawn faster than previous models. The RMA 510 V also includes a holding slot for a second battery, so you can swap batteries and be ready to cut again in seconds. It also features an adjustable handlebar, grass catcher and larger rear wheels for rough terrain. This battery-powered lawn mower is great for medium to larger sized gardens. Run time may vary based on battery type, charge level and capacity, model, operating style and conditions. Batteries and chargers can be purchased separately or as a combined kit with the skin.