Greenworks 82V 21" Brushless Self-Propelled Mower with 8Ah Battery and Dual Port Charger (82LM21S-8DP)

Take the hard work out of mowing with a commercial-grade, battery-powered mower built to outperform traditional gas. Powered by high-output brushless motor technology, this mower delivers more power than a 160cc gas mower and 2X more torque for confident cutting in thick, tall grass—without the clumping or uneven results that can happen when gas engines bog down.

With a durable 21" steel deck, you’ll cover more ground in fewer passes while getting a clean, consistent finish. The self-propelled, variable-speed rear-wheel drive keeps you moving comfortably across slopes and long runs, and SmartCut™ technology senses grass conditions and automatically adapts power for the perfect cut—boosting performance when you need it and conserving energy when you don’t.

Designed for efficiency, the dual-port battery system delivers up to 60 minutes of runtime and features automatic battery switchover to keep you cutting with minimal interruptions. When it’s time to recharge, the dual-port charger brings you back to work in just 60 minutes. On a full charge, you can mow up to 1.5 acres, making it a strong choice for larger residential properties and demanding weekly maintenance.

And because it’s all electric, you get the benefits immediately: no gas smell, no pull cords, no emissions, and low-noise operation—plus reduced upkeep with fewer wear parts and no mixing fuel or messy spills. When you’re done, heavy-duty folding handles make vertical storage simple.

Key Features

• Power equivalent: Commercial brushless motors deliver more power than a 160cc gas mower

• 2X more torque for thick grass and consistent blade speed

• 21" durable steel deck for productivity and long service life

• Self-propelled with variable-speed rear-wheel drive

• SmartCut™ technology automatically adjusts power to grass conditions

• Dual-port battery system with automatic battery switchover

• Up to 60 minutes runtime

• 60-minute charge time with the included dual-port charger

• 3-in-1 cutting system: mulch, rear bagging, side discharge (great for leaf pickup and striping)

• Heavy-duty folding handles for vertical storage

• Low noise + low maintenance: no gas, no emissions, no pull cords, no fuel mixing