Greenworks 40V 21-in Brushless Push Mower (5.0Ah kit) Review (2026)
By Nate Sawyer, Editor · Updated July 2026
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4.4$249Approx. street price for the 21-in brushless push kit with 5.0Ah battery and chargerCheck Price on Amazon →
- Small yards
- Battery
- Push
On specs and owner feedback, this brushless 40V push mower brings a 21-inch deck, dual battery ports and 3-in-1 discharge for around $250, a quiet pick for flat lawns under a quarter acre. Limits: it's push-only, so hills and thick turf take effort, the ~45-minute runtime on one pack caps larger jobs, and it isn't light to maneuver.
Pros
- Brushless motor and dual battery ports give a quiet, no-fuss entry into cordless mowing near a $250 spec price
- 3-in-1 deck covers bagging, mulching, and side discharge for typical suburban lawns
- Battery works across the large Greenworks 40V ecosystem of yard tools
Cons
- Push-only, so hills and thick turf take real effort compared with a self-propelled unit
- ~45-min rated runtime on one 5.0Ah battery limits it to smaller yards on a single charge
- 21-in steel deck plus battery is not the lightest push option to maneuver and store
Specifications
| Power | 40V battery (5.0Ah) |
|---|---|
| Deck | 21 in steel |
| Drive | Push (not self-propelled) |
| Runtime | Up to ~45 min (40V 5.0Ah) |
| Cutting height | 7 positions |
| Discharge | 3-in-1 bag / mulch / side discharge |
| Best for | Up to ~1/4 acre |
Frequently Asked Questions
- What do the dual battery ports do?
- They let you carry a second pack on board so the mower switches over when the first runs down, which is the practical answer to a roughly 45-minute rated runtime on one 5.0Ah battery.
- Is a brushless motor worth caring about?
- Yes — it runs quieter, wastes less energy as heat and generally lasts longer than a brushed motor, which is why it shows up at this price point rather than only on premium mowers.
- What are the limits of this mower?
- It is push-only, so hills and thick turf take real effort, and a 21-in steel deck plus battery is not the lightest thing to maneuver or store. It suits about a quarter acre.