The Worx Nitro WG751.3 40V Power Share 20” Push Lawn Mower with Two 4.0Ah High-Capacity Batteries was made to outperform traditional battery and gas-powered lawn mowers. Power Share PRO batteries offer gas-like power, performance, and runtime, but without any of the downsides of using a gas mower. Worx Nitro mowers run cleaner, quieter, and cost less to operate and maintain than gas mowers. And thanks to Power Share PRO batteries, they meet or exceed their performance, too. Worx Nitro mowers are also fully featured. 3-in-1 functionality allows the user to easily switch from mulching to side-discharge to bagging, so depending on the needs of your lawn, you’ll be able to mow it properly.