Greenworks 40V 21" Brushless Cordless Self-Propelled Lawn Mower — 21" Steel Deck, 5.0Ah Battery Included

The Greenworks 40V 21" brushless self-propelled lawn mower is a cordless, maintenance-free mower that delivers quiet, efficient cutting with dual-battery switchover and a 5.0Ah battery included.

If you want the power and run time of gas without the upkeep, this Greenworks mower is built to replace traditional push mowers. It pairs a brushless motor with a robust 21" steel deck, a 3-in-1 cutting system (bag, side discharge, mulch), and self-propelled rear-wheel drive, so medium to large yards get cut faster and with less effort. The unit includes a 5.0Ah 40V battery and charger and supports Greenworks' dual-battery ports for automatic switchover when a second battery is installed.

How long will a single charge run and what affects runtime?

Typical run time is up to about 45 minutes with a fully charged 5.0Ah battery, though actual results vary by grass type, terrain, and cutting height. Using the self-propelled drive, thicker grass, or higher blade settings will draw more power and shorten run time.

• Includes 5.0Ah 40V battery and charger for immediate use.
• Dual battery ports allow automatic switchover if a second battery is fitted.
• Brushless motor improves efficiency and runtime compared with brushed motors.
• Run time varies based on lawn density, slope, and blade height.

What cutting features and adjustments does it offer?

The 21" steel deck with dual blades gives a wide cut and consistent finish, while a seven-position single-lever height adjustment handles everything from short lawns to longer, seasonal runs. Choose rear bagging, side discharge, or mulching to match your yard care routine.

• 21" durable steel deck with dual blades for wider coverage.
• Single-lever, seven-position height adjustment for accurate cutting heights.
• 3-in-1 capability: rear bag, side discharge, and mulch plug included.
• 8" front wheels for smoother rolling over uneven surfaces.

How easy is it to start, store, and maintain?

Start-up is instant with a push-button ignition—no choke, no gas, no oil. The brushless motor reduces long-term maintenance needs, and the mower stores upright to free up up to 70% more space in your garage or shed.

• Push-button start for quick, reliable operation every time.
• Virtually maintenance-free: no fuel, no oil changes, and fewer moving parts.
• Vertical storage design saves space in tight storage areas.
• Brushless motor offers quieter operation and longer motor life.

What about traction, warranty, and durability?

Rear-wheel drive helps the mower pull itself across slopes and thicker turf for easier handling. The steel deck and brushless motor are built for durability, and Greenworks backs the tool with a multi-year warranty for peace of mind.

• Self-propelled rear-wheel drive improves traction on inclines and rough ground.
• Durable steel deck resists denting and delivers consistent cut quality.
• 4-year tool warranty and 2-year battery warranty included.
• Automatic dual-battery switchover protects uninterrupted mowing with two batteries.

Who is this for? This Greenworks 40V 21" brushless self-propelled mower is ideal for homeowners who want gas-like performance without the maintenance: people with medium to large lawns, those who value quiet operation, and anyone who prefers cordless convenience and vertical storage. It suits buyers who plan to grow an ecosystem of 40V tools, thanks to compatibility with 75+ Greenworks batteries and accessories.