Product Review: Greenworks 40V 21" Brushless Cordless (Smart Pace / Self-Propelled) Lawn Mower (75+ Compatible Tools), (2) 4.0Ah Batteries and Charger Included
Introduction
If you’re looking to buy Greenworks 40V mower that delivers gas-like power without the mess, this Greenworks 40V lawn mower is worth a close look. The Greenworks 40V 21" brushless self-propelled mower comes as a complete kit with two 4.0Ah batteries and a charger, making it a practical option for homeowners who want a quiet, low-maintenance alternative to gas mowers. In this review I’ll cover features, real-world performance, pros and cons, and who should consider the Greenworks 21-inch mower for sale right now.
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What is this product?
The Greenworks 40V 21" Brushless Cordless Lawn Mower is a self-propelled, battery-powered mower built on Greenworks’ 40V platform — compatible with 75+ Greenworks tools. This Smart Pace mower adapts to your walking speed and features a durable 21-inch steel deck and a brushless motor for improved torque and longer life. The kit includes (2) 4.0Ah batteries and a charger, so you can start mowing right away.
Key positioning: it’s a 21-inch cordless mower and a 40V brushless mower designed for small to medium suburban yards, delivering up to 60 minutes of run-time using the two included batteries (actual run-time varies by grass conditions).
Key Features
- Cordless lawn mower — No gas, no oil, no emissions; push-button start and quiet operation.
- 40V brushless motor — More torque, quieter operation, and improved durability compared to brushed motors.
- Self-propelled with Smart Pace — Automatically adjusts to your walking speed for smoother, less tiring mowing.
- 21" steel deck — Large enough to handle medium lawns quickly while remaining maneuverable.
- Two battery ports with auto switchover — When one battery drains, the mower automatically switches to the second for longer uninterrupted run-times.
- 3-in-1 cutting — Mulch, side discharge, or rear bag your clippings using the single lever 7-position height adjustment.
- Includes (2) 4.0Ah batteries and charger — Great as a 21 inch mower kit for homeowners with multiple Greenworks tools.
Detailed Description
The Greenworks 40V 21" Brushless Cordless (Smart Pace / Self-Propelled) Lawn Mower is built around a DURABLE 21” STEEL DECK that helps you cover more turf per pass. The brushless motor provides more torque and quiet operation, producing a longer life than traditional brushed motors. Because it’s part of the 40V platform, the battery is compatible with 75+ Greenworks tools — ideal if you already own or plan to buy additional Greenworks garden equipment.
The Smart Pace self-propelled system offers a hands-free feeling: you walk at your natural speed and the mower adjusts automatically. Dual battery ports with automatic switchover reduce interruptions, and with two 4.0Ah batteries you’ll typically get up to 60 minutes of run-time under favorable conditions. The 7-position single lever height adjustment and 3-in-1 cutting options make this a versatile choice: mulch to return nutrients, discharge for heavy grass, or use the rear bag for a tidy finish. Vertical storage capability helps save up to 70% garage space.
Pros and Cons
Pros
- Low maintenance: No gas, oil changes, or tune-ups — ideal for busy homeowners.
- Quiet and efficient: Brushless motor keeps noise down while delivering consistent cutting power.
- Complete kit: Two 4.0Ah batteries and a charger are included, so you don’t have to buy extra accessories.
- Smart Pace self-propelled: Makes mowing less strenuous and more consistent.
- Good run-time: Dual batteries provide up to ~60 minutes depending on conditions — great for medium lawns.
Cons
- Battery dependent: Run-time decreases on tall or thick grass; may require a recharge for very large yards.
- Weight: With batteries installed it’s heavier than some corded or single-battery models — but still manageable thanks to self-propel.
- No onboard battery gauge: You’ll want to keep an eye on battery level if you have a complex yard layout.
Who Should Buy This Product
This Greenworks cordless mower kit with batteries is best for homeowners with small to medium suburban yards who want a quiet, low-maintenance mower. If you want to buy Greenworks 40V mower to replace a gas mower, appreciate cordless convenience, and already own other Greenworks 40V tools (or plan to), this is a great fit. It’s also attractive for buyers searching for a 40V mower with 2 batteries included so you can mow without stopping to charge.
Search terms that match this product: Smart Pace self-propelled 21 inch mower for medium lawns, battery powered lawn mower with two 4.0Ah batteries, and 21 inch mower kit for homeowners with multiple Greenworks tools.
Comparison with Similar Products
Compared to single-battery 40V mowers, the dual battery ports with automatic switchover are a clear advantage for longer run-time. Versus gas mowers, the Greenworks 40V lawn mower is quieter, requires less upkeep, and has zero emissions, though it can be limited on longer run times for very large properties. Within the cordless category, this 40V brushless mower competes well against similarly powered brands by offering a 21-inch deck and Smart Pace self-propulsion, which some competitors do not include.
- Vs. single-battery 40V mower: Better run-time and uninterrupted mowing.
- Vs. gas mower: Lower maintenance, quieter, but may need more charging for very large yards.
- Vs. other cordless brands: Solid balance of power, battery compatibility with 75+ tools, and included batteries/charger makes it a competitive package.
Frequently Asked Questions
How long does the mower run on the included batteries?
Greenworks estimates up to 60 minutes of run-time on (2) fully charged 4.0Ah batteries, although actual time varies with grass condition and operator technique.
Is the motor truly brushless?
Yes — the 40V brushless motor increases torque, reduces noise, and extends motor life compared to brushed alternatives.
Where to buy Greenworks mower and what about price?
You can buy the Greenworks 21-inch mower for sale on Amazon and other retail sites. For current Greenworks 40V mower price and deals, check the product page below.
Final Verdict
Overall, the Greenworks 40V 21" Brushless Cordless (Smart Pace / Self-Propelled) Lawn Mower is a strong choice for homeowners seeking a quiet, low-maintenance, and capable cordless mower. The inclusion of two 4.0Ah batteries and a charger makes this package convenient out of the box, and the Smart Pace self-propelled feature reduces fatigue while mowing. If you need a 21-inch cordless mower that integrates with a broader 40V ecosystem, this model is one of the best cordless brushless mowers for suburban yards.
Ready to buy? If you want to buy Greenworks 40V mower or are looking for Greenworks mower deals and bundles, check the Amazon listing below for the latest price and availability.