Greenworks 40V 20-Inch Cordless Push Mower - Dual Battery Run-Time

Our review of the Greenworks 40V 20-Inch Cordless Push Lawn Mower finds it best suited for homeowners with small to mid-size yards who want a low-maintenance, gas-free alternative. The single biggest reason to buy is its dual battery port and dual blade design, which combine to extend run-time and improve cutting and mulching performance without the hassles of cords or gas. Practical, straightforward, and built around Greenworks' 40V ecosystem, this mower is an attractive option when battery compatibility and a tidy lawn finish matter most.

Key Features

• Dual Battery Port: Automatically switches to the backup battery for extended run-time so you can finish up to about 1/3 acre without interruption.
• Dual Blade Design: Two blades improve mulching and cutting action, helping produce finer clippings for a neater lawn finish and better bagging performance.
• 40V G-Max Compatibility: Uses the 40V battery system shared across many tools, making battery interchange and storage simpler if you already own Greenworks tools.
• Cordless Convenience: Eliminates the need for gas or a cord, reducing maintenance and making startup simple and clean for routine yard work.
• Plastic Stamped Deck: Lightweight deck construction makes the mower easier to push and maneuver around landscaping and tight spots.
• Included Batteries and Charger: Ships with a 4.0Ah and a 2.0Ah battery plus charger, providing immediate run-time and a backup for longer tasks.

Who It's For

This mower is ideal for owners of yards up to about 1/3 acre who value cordless convenience and low upkeep. It fits households that appreciate quick starts, the absence of tune-ups, and the flexibility to use one battery across multiple 40V tools.

It is less appropriate for large properties that need extended continuous runtime beyond the combined battery life, or for users who require a heavy-duty metal deck or zero-turn maneuverability. Buyers who need commercial-grade durability should look at larger walk-behind or gas models instead.

Pros & Cons

Pros

• Dual battery port provides extended run-time and reduces mid-job interruptions.
• Dual blade system improves mulching and cutting quality for a cleaner lawn appearance.
• Included batteries and charger mean the mower is ready to use out of the box.
• Plastic stamped deck keeps the mower light and easy to push around landscaping.

Cons

• Run-time is limited by battery capacity and best suited to yards up to about 1/3 acre.
• Plastic deck may not match the long-term durability of heavier stamped steel decks for very rough use.

Specifications

Model	Greenworks 40V 20-Inch Cordless Push Mower
Voltage	40V
Cutting Width	20 in
Battery Capacity Included	4.0Ah + 2.0Ah
Run-Time	Approximate 70 minutes total (with included batteries)
Deck Material	Plastic
Deck Type	Stamped

Our Verdict

The Greenworks 40V 20-Inch Cordless Push Mower is a practical choice for homeowners with small to medium yards who want a simple, low-maintenance mower that benefits from a shared 40V battery ecosystem. Its dual battery port and dual blade design deliver better run-time and improved cutting results, making it good value for those who need cordless convenience rather than commercial-grade durability.

Frequently Asked Questions

How large a yard can this mower handle?
The mower is best for yards up to about 1/3 acre using the included batteries and dual battery port for extended run-time.

Are batteries and charger included?
Yes, the mower ships with one 4.0Ah and one 2.0Ah battery plus a charger so it is ready to use out of the box.

Can I use other Greenworks 40V batteries?
Yes, the mower uses the 40V G-Max battery system and is compatible with other batteries in that line for additional run-time.