The Ryobi Lithium+ Mowers redefine the 18-Volt category by delivering the power, run time and performance you'd expect from higher voltage lines, while still offering the versatility of the ONE+ system. The Ryobi 16 in. Hybrid 18-Volt Lithium+ Lawn Mower is the first dual power mower in the industry. Its unique design allows you to switch from the included ONE+ 4.0 Ah lithium-ion battery to an extension cord to ensure that you will never run out of power. This mower has two battery ports, giving you the option of using a second ONE+ battery to increase the cordless run time. With its simple push button start and single point height adjustment, this mower makes lawn care easier than ever before. Its lightweight and compact design makes this mower ideal for small yards and maneuvering in tight spaces. This mower also has a 2-in-1 mulching or bagging system, allowing you to get the job done quickly and just the way you like. The foldable handle has quick-release knobs, making it simple for those with limited storage to prepare for use and put up. For additional convenience, this lightweight, compact mower has a top-mounted handle, making it easy to carry from one place to another. The 18-Volt Lithium+ battery and charger are compatible with any of the Ryobi 18-Volt ONE+ tools. Backed by a 3-year warranty.