Missing Battery This 21-in self-propelled, variable-speed front wheel drive features a 159cc automatic choke engine for maximum performance and is also equipped with a V20 push button start that provides quick and easy starting every time. The lithium-ion V20 battery can also be used in a variety of other outdoor products as well as and power tools on the V20 system. A 3-in-1 deck allows you to discharge, mulch to help put nutrients back in your soil for a healthier lawn, or use the 1.9 bushel dust blocker bag for easy clean up or composting while reducing in-air dust and debris. The dual-lever, 6 position height adjustment makes it easy for you to change the cutting heights while mowing. 20 V max battery, maximum initial battery voltage (measured without a workload) is 20 V nominal voltage is 18. Features a 159cc automatic choke engine for maximum performance Push button start provides a quick and easy startup so you can be mowing in no time. Mower includes V20 lithium-ion battery and charger Front wheel drive with true variable-speed control allows you to set your own mowing pace 21-in self-propelled, 3-in-1 convertible deck lets you side discharge, mulch, or bag grass clippings Dual-lever, 6 position height adjustment makes it easy to change cutting heights from 1.25-in-3.75-in high Large 1.9 bushel rear bag collects grass clippings for easy clean up or composting. The Dust Blocker bag reduces in-air dust and debris The included mulch kit helps put nutrients back into soil for a healthier lawn and the deck wash port connects to a standard garden hose to clean grass clippings from underside of the deck