Greenworks 40V 16" (Push) Cordless Lawn Mower, 4.0Ah Battery (1/3 Acre, Push Button Start, Compatible with 75+ Tools) Review
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The Greenworks 40V 16" cordless push mower is a lightweight, battery-powered workhorse designed for small to medium lawns up to 1/3 acre. It targets homeowners who want to ditch gas, oil, and pull-cords without sacrificing reliable cutting performance. With a push-button start and a 4.0Ah battery included, this mower offers a quiet, low-maintenance alternative for those who value convenience over raw power.
Who Should Buy This
- Homeowners with 1/4 to 1/3 acre lawns — The 16-inch deck and 4.0Ah battery handle this size range efficiently on a single charge, making it ideal for typical suburban yards.
- Gas-averse users — If you’re tired of storing fuel, dealing with stale gas, or fighting with a pull-cord, this mower’s push-button start and electric simplicity will feel like a revelation.
- Eco-conscious buyers on a budget — At $250, it’s one of the most affordable cordless mowers with a brand-name battery system. Plus, it runs silently enough for early-morning mowing without upsetting neighbors.
- Homeowners with existing Greenworks 40V tools — This battery is compatible with over 75 tools (trimmers, blowers, chainsaws), so you can share batteries and save money over time.
Key Features Breakdown
- 40V 4.0Ah Battery — This is the heart of the system. The 4.0Ah capacity provides about 30–40 minutes of runtime on a single charge, which translates to roughly 1/3 acre of typical grass. It’s a mid-range battery—adequate for the target lawn size, but you’ll want a second battery for larger yards or thick, wet grass.
- 16-Inch Cutting Deck — Smaller than the typical 20-21 inch gas mowers, this deck is nimble in tight spaces and easier to maneuver around flower beds and fences. The trade-off is more passes on open areas, but it keeps the mower light (around 35 pounds) and manageable.
- Push-Button Start — No pull-cord frustration here. Press a button, and the mower fires up instantly. The battery key prevents accidental starts, which is a nice safety touch for storage.
- Single Lever Height Adjustment — Adjusts cutting height from 1.5 to 3.75 inches across 6 positions via one lever. It’s simple and quick, though the range is narrower than some gas mowers (which often go up to 4 inches or more).
- 3-in-1 Functionality — Bag, mulch, or side-discharge. The bag is a 10-gallon soft-sided unit that’s easy to empty, but it fills quickly with tall grass. Mulching is decent for light clippings; side-discharge is best for thick growth.
- Foldable Handle — The handle folds down for compact storage, which is great for tight garages or sheds. No tools required.
Pros
- Effortless start — The push-button ignition is a game-changer for anyone who’s ever yanked a cord 20 times. It’s reliable even in damp conditions.
- Lightweight and maneuverable — At 35 pounds, it’s easy to push, lift over curbs, and load into a car. Ideal for smaller users or those with physical limitations.
- Quiet operation — At roughly 80 decibels, it’s far quieter than a gas mower. You can mow early or late without disturbing the peace.
- Battery system compatibility — The 40V battery works with a wide range of Greenworks tools, making it a smart investment if you’re building a cordless tool family.
- Low maintenance — No oil changes, no spark plugs, no gas to mix. Just charge, mow, and store.
- Good value for the price — At $250, it undercuts many competitors (like Ryobi or EGO) while delivering solid battery performance and a brand with strong support.
Cons
- Limited runtime for larger lawns — The 4.0Ah battery struggles to finish a full 1/3 acre if the grass is thick or damp. You may need a second battery (sold separately) for reliable coverage.
- Small cutting deck — 16 inches means more passes and longer mowing time compared to a 20-21 inch mower. It’s fine for small yards, but inefficient for open spaces.
- Plastic deck durability concerns — The deck is reinforced plastic, not steel. It’s light and won’t rust, but it can crack if you hit a large rock or stump. Gas mowers with steel decks are tougher here.
- Bag capacity is small — The 10-gallon bag fills up fast, especially in spring growth. Expect to empty it frequently, which can interrupt your mowing rhythm.
Bottom Line
The Greenworks 40V 16" cordless mower is an excellent entry-level battery mower for small-lot homeowners who prioritize convenience, quiet operation, and zero maintenance over raw cutting power. It’s not for large lawns, thick brush, or anyone who needs a wide deck—but for 1/4 to 1/3 acre suburban yards, it delivers reliable, fuss-free mowing at a price that’s hard to beat. If you already own Greenworks 40V tools, this is a no-brainer. If you’re new to battery mowers, start here.
Frequently Asked Questions
How long does the battery last, and can I use a larger battery?
The included 4.0Ah battery runs about 30–40 minutes on a full charge, enough for roughly 1/3 acre of normal grass. Yes, Greenworks sells larger 40V batteries (like 5.0Ah or 6.0Ah) that are fully compatible and extend runtime. A 5.0Ah adds about 10–15 minutes.
Does this mower work on slopes or uneven terrain?
It handles gentle slopes (up to about 15 degrees) fine, but the small wheels and lightweight design mean it can lose traction on steeper grades or bumpy ground. It’s best for relatively flat, well-maintained lawns.
Can I use this mower without the battery key?
No. The battery key (a small plastic tab) must be inserted for the mower to start. It’s a safety feature to prevent accidental operation. Keep the key stored with the mower—if you lose it, you’ll need a replacement from Greenworks.
How It Compares
Quick Verdict
Greenworks wins overall for most buyers due to its wider 16" cutting deck, push-button start, and superior battery platform compatibility, offering better value for slightly larger yards at a modest $20 premium.
Side-by-Side Comparison
| Feature | Greenworks 40V 16" (Mower A) | WORX 14" 2-in-1 (Mower B) |
|---|---|---|
| Price | $249.99 | $229.47 |
| Power Source | 40V lithium-ion (1 battery, 4.0Ah) | 20V lithium-ion (2 batteries, 2.0Ah each) |
| Cutting Width | 16 inches | 14 inches |
| Self-Propelled | No (push) | No (push) |
| Best Yard Size | Up to 1/3 acre | Small yards under 1/4 acre |
| Warranty | 4-year (tool), 2-year (battery) | 3-year limited |
Where Greenworks Wins
1. Wider cutting deck saves time
The 16-inch cutting width vs. WORX’s 14-inch means Greenworks cuts 14% more grass per pass. For a 1/3-acre yard, that shaves off roughly 10–15 minutes compared to the smaller WORX, reducing total mowing time.
2. Push-button start eliminates pull cords
Greenworks features a simple push-button start—no recoil cord to yank. This is a genuine convenience upgrade, especially for users with limited hand strength or those who dislike the traditional pull-start hassle. WORX still uses a manual pull-start.
3. Larger battery platform with 75+ tool compatibility
The 40V 4.0Ah battery provides more runtime (typically 30–45 minutes on a single charge) and works across Greenworks’ extensive 75+ tool ecosystem—including string trimmers, blowers, and chainsaws. This makes it a better long-term investment for homeowners who want a single battery system for multiple tools. WORX’s 20V platform is also broad but offers less power per battery.
Where WORX Wins
1. Includes two batteries for extended runtime
WORX ships with two 20V 2.0Ah batteries and a charger, giving you hot-swappable runtime. While each battery is smaller (40Wh total vs. Greenworks’ 144Wh), having two means you can keep mowing while one charges—useful for small yards where you might run out mid-job.
2. Lighter and more compact for storage
At roughly 28 lbs, WORX is noticeably lighter than the Greenworks (around 35 lbs). Its 14-inch deck and foldable handle make it easier to lift into a car trunk, hang on a wall, or store in tight garage spaces. Ideal for renters or those with limited storage.
3. 2-in-1 mulching and rear bagging capability
WORX offers true 2-in-1 functionality: you can switch between mulching (which finely chops clippings) and rear bagging (for clean collection) without needing extra attachments. The Greenworks also mulches and bags, but WORX’s design is simpler for quick swaps, and the smaller deck makes bagging easier in tight spots.
Which Should You Buy?
Buy Mower A (Greenworks) if:
- Your yard is 1/4 to 1/3 acre and you want to finish faster with fewer passes.
- You value push-button start and plan to expand into Greenworks’ 40V tool system.
- You prefer a single, larger battery over swapping smaller ones.
Buy Mower B (WORX) if:
- You have a small yard (under 1/4 acre) and prioritize lightweight, easy storage.
- You want the convenience of two batteries for uninterrupted mowing.
- You need a simpler 2-in-1 mulching/bagging system and don’t mind a narrower cut.
Buy neither if:
Your yard exceeds 1/3 acre—both models lack self-propulsion and sufficient runtime for larger lawns. Consider a 20+ inch self-propelled mower instead.
Quick Verdict
The Greenworks 40V wins overall for most buyers due to its stronger single-battery system, higher user satisfaction (4.2 vs 4.0 rating across nearly 3x more reviews), and compatibility with a 75+ tool ecosystem—making it a smarter long-term investment despite the higher price.
Side-by-Side Comparison
| Feature | Greenworks 40V 16" | LawnMaster CLMF4819X |
|---|---|---|
| Price | $249.99 | $197.99 |
| Power Source | 40V (single 4.0Ah battery) | 2 x 24V (two 4.0Ah batteries) |
| Cutting Width | 16 inches | 19 inches |
| Self-Propelled | No (push) | No (push) |
| Best Yard Size | Up to 1/3 acre | Up to 1/2 acre |
| Warranty | 4-year tool, 2-year battery | 2-year limited |
Where Greenworks Wins
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Stronger single-battery system – The 40V platform delivers more consistent power per battery than LawnMaster’s dual 24V setup. You get better torque for thicker grass and don’t have to manage two separate batteries that must be charged together. Greenworks’ single 4.0Ah battery also simplifies runtime—you can swap with any other 40V Greenworks tool.
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Ecosystem compatibility – Greenworks’ 40V system works with 75+ tools (trimmers, blowers, chainsaws, etc.). If you already own Greenworks gear, this mower uses the same batteries. If you’re starting fresh, buying into this ecosystem saves money long-term. LawnMaster’s 24V system is isolated to their limited product line.
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Higher reliability and trust – With 11,946 reviews and a 4.2 rating, Greenworks has a proven track record. Users consistently praise its push-button start, quiet operation, and consistent cutting. The 4-year tool warranty (vs LawnMaster’s 2 years) also signals better build quality and long-term support.
Where LawnMaster Wins
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Wider cutting deck – At 19 inches, the LawnMaster cuts 3 inches wider per pass than the Greenworks 16-inch. For yards over 1/4 acre, this reduces mowing time by about 15-20%. If you have a medium-sized lawn (1/3 to 1/2 acre), the wider deck is a practical advantage.
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Lower upfront price – At $197.99, the LawnMaster costs $52 less than the Greenworks. It also includes two 4.0Ah batteries and a dual charger—so you get more battery capacity out of the box (8.0Ah total vs Greenworks’ 4.0Ah). For budget-conscious buyers who don’t need ecosystem compatibility, this is a strong value.
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Six cutting height positions – The LawnMaster offers 6 adjustable cutting heights (vs Greenworks’ typical 5-7, though not specified). This gives slightly more fine-tuning for different grass types or seasonal preferences. Combined with the wider deck, it’s better suited for uneven lawns where you need to dial in exact height.
Which Should You Buy?
Buy Mower A (Greenworks) if:
- You have a small yard (under 1/3 acre) and want a reliable, simple mower that integrates with a larger tool ecosystem. The stronger single-battery system and longer warranty make it a better long-term investment, especially if you plan to add other Greenworks 40V tools.
Buy Mower B (LawnMaster) if:
- You have a medium yard (1/3 to 1/2 acre) and want to save money upfront. The wider 19-inch deck cuts mowing time, and the included dual-battery setup gives you 8.0Ah total capacity—useful for larger lawns. Just be aware of the shorter warranty and limited ecosystem.
Buy neither if:
- You have a hilly yard over 1/2 acre. Both are push mowers with limited battery capacity. Consider a self-propelled model (e.g., Greenworks 40V self-propelled or EGO Power+ line) or a gas mower for steep terrain and larger lawns.
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🛒 View on Amazon →Last updated: June 2026