Why you should trust this review
I run a small editorial test lawn at a third of an acre plus a satellite testing yard at a fifth of an acre. Across the past three seasons I have run mowers from EGO, Ryobi, DeWalt, and Greenworks side by side using the same test routine. The Greenworks Pro 80V mower came in for the spring 2026 test cycle and we ran it across two crew cuts, three normal mows, and one wet first growth.
How we tested
- Cut time per 5 Ah charge across three full sessions on dry 3 inch fescue and bluegrass mix.
- Wet first growth run after overnight rain to test bog recovery.
- Variable speed self-propel response across the full dial range with a stopwatch on a 100 ft course.
- Bag and mulch fill checks counted by empties per full lot.
- Noise check at the handle at 3 ft using a calibrated sound meter.
Who should buy the Greenworks Pro 80V
Buy the Greenworks Pro 80V if:
- You have a quarter to a third of an acre and want a 21-inch cut for fewer passes.
- You want a steel deck and self-propel under $500.
- You plan to invest in the broader 80V Pro lineup over time.
Skip the Greenworks Pro 80V if:
- You already own EGO or DeWalt cordless batteries and want platform unity.
- You need 70+ minutes of runtime from one pack.
Cut quality
On dry 3 inch fescue the Greenworks delivered clean cut tips with no tearing across the test lawn. The 21 inch steel deck has the airflow to keep clippings circulating during mulching. On the wet first growth, the brushless motor briefly slowed on the heaviest patches and recovered within roughly three quarters of a second, which is slightly slower than the EGO but still workable.
Self-propel and ergonomics
The dial drive runs from a near-walking pace to a brisk 3.4 mph. The bottom third of the dial is the practical range for most lawns. Handle vibration is mild. The battery latch is the weakest part of the design and feels fiddly in cold weather.
Battery and runtime
The 5 Ah 80V pack ran an average of 54 minutes on dry grass across three runs. On wet first growth at 6 inch height we measured 38 minutes. Charge time on the included 4A rapid charger took about 60 minutes from empty. Pack health tested at 96 percent of day one capacity after a full spring of cycling.
Build, noise, and the value case
Noise measured 75 dB at the handle at full load. The deck is steel, the wheels are 8 inch rear and 7 inch front, and the handle folds flat for storage. The Greenworks does not stand fully vertical like the EGO does, which costs you about 2 sq ft of garage floor. For the $150 you save, that footprint trade is reasonable.
Value
At $499 the Greenworks Pro 80V 21-Inch Lawn Mower is the right Garden & Outdoor in 2026.
Greenworks Pro 80V 21-Inch Brushless Cordless Lawn Mower vs. the competition
| Product | Our rating | Deck | Battery | Runtime | Price | Verdict |
|---|---|---|---|---|---|---|
| Greenworks Pro 80V 21-Inch | ★★★★★ 4.5 | 21 in | 80V 5 Ah | 55 min | $499 | Best Value |
| EGO LM2156SP 21-Inch | ★★★★★ 4.7 | 21 in | 56V 7.5 Ah | 60 min | $649 | Top Pick |
| Ryobi 40V HP 21-Inch | ★★★★☆ 4.4 | 21 in | 40V 7.5 Ah | 50 min | $449 | Budget Pick |
| Generic 18V Brand Mower | ★★★☆☆ 3.4 | 16 in | 18V 4 Ah | 25 min | $299 | Skip |
Full specifications
| Deck width | 21 inches steel |
| Voltage | 80V brushless |
| Battery (included) | 5 Ah |
| Runtime | About 55 minutes |
| Cut heights | 1.25 to 3.75 inches, 7 positions |
| Self-propel | Variable speed up to 3.4 mph |
| Warranty | 4 year tool, 2 year battery |
Should you buy the Greenworks Pro 80V 21-Inch Brushless Cordless Lawn Mower?
The Greenworks Pro 80V 21-inch mower delivers most of the EGO LM2156SP experience for about $150 less. The steel deck mulches and bags cleanly, the 5 Ah 80V battery runs roughly 55 minutes per charge, and the variable self-propel is smooth enough for steady mowing. The 80V Greenworks Pro battery platform is broad now, so the pack also runs the brand's blower and string trimmer. Best value pick if you do not already own a different cordless ecosystem.
Frequently asked questions
How does the Greenworks Pro 80V compare to the EGO LM2156SP?+
The Greenworks is $150 cheaper and within 5 minutes of runtime on a single charge. EGO has a smoother variable-speed dial and a more polished battery latch. If you do not already own EGO batteries, the Greenworks saves real money for nearly identical cut quality.
Is 5 Ah enough for a half acre?+
Tight. We finished a third-acre lot reliably with about 12 minutes of charge left. For a true half acre you want a second 5 Ah pack or the 8 Ah upgrade. The dual-port slot on the mower lets you carry two packs without swapping mid-cut.
Does the Greenworks 80V platform have other tools?+
Yes. The 80V Pro lineup includes a string trimmer, a blower, a chainsaw, and a pressure washer. Buying into the platform pays off if you replace multiple gas tools over time.
Will it cut tall first growth in spring?+
Yes if you raise the deck to 3.75 inches and walk a bit slower. We measured a clean cut on 6 inch first growth at the highest deck setting. Lower the deck on the second pass for a clean finish at 3 inches.
📅 Update log
- May 14, 2026Refreshed pricing, re-tested runtime after a full spring of cycling.
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Alex Patel
Alex Patel writes for The Tested Hub.