Product Review: Greenworks 40V 20" Twin Blade Mower, 4.0Ah + 2.0Ah Battery
Introduction
If you’re looking to buy a quieter, maintenance-free mower that still packs enough power for small to medium yards, the Greenworks 40V mower family is worth considering. In this review I’ll walk through the features, performance, and real-world value of the Greenworks 40V 20" Twin Blade Mower, 4.0Ah + 2.0Ah Battery. Whether you want to buy Greenworks 40V mower or search for a Greenworks 20 inch mower for sale, this guide helps you decide if this battery powered lawn mower is the right fit.
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What is this product?
The Greenworks 40V 20" Twin Blade Mower is a cordless electric mower built for yards up to roughly 1/3 acre. It’s a 40V cordless mower that ships with two batteries (4.0Ah and 2.0Ah) and uses a dual-blade design to improve cut quality, mulching, and bagging. With dual battery ports and auto switch technology, it aims to deliver longer runtime and less interruption than single-battery models.
Key Features
Main specifications
- Model: Greenworks 40V 20" Twin Blade Mower, 4.0Ah + 2.0Ah Battery
- Cutting deck: 20" lightweight stamped plastic deck suitable for small to medium yards
- Battery: Includes 4.0Ah and 2.0Ah G-Max 40V batteries
- Motor: Brush type: No (brushless motor: No) — No-load speed: 6000 RPM
Key selling points (from “About this item”)
- CORDLESS 20” LAWN MOWER – Provides power and up to 45 minutes runtime on a fully charged 4.0Ah and 2.0Ah battery.
- LIGHTWEIGHT, EASY TO USE – 20” cutting deck designed for easy maneuvering through small to medium yards (up to ½ acre).
- TWIN BLADES – Better cut quality, superior mulching and bagging capabilities.
- AUTO SWITCH / SMART CUT TECHNOLOGY – Dual battery ports with auto switch for uninterrupted mowing; smart cut adjusts power/runtime to grass thickness.
- MAINTENANCE FREE – No gas, no oil, and no emissions. Starts instantly and is quiet while delivering gas-like power.
Detailed Description
According to the product description, the Greenworks 40V Dual Blade/Dual Battery Port Mower is ideal for yards up to 1/3 acre with an approximate total battery run-time of 70 minutes when using both batteries effectively. The G-Max 40V system supports a broad lineup of tools (over 40+) that share the same battery platform — handy if you already own or plan to grow a Greenworks tool collection.
The dual blade system is the standout: it improves mulching and bagging performance, producing a cleaner finish. The Dual Battery Port automatically switches to your backup battery to extend runtime without manual swapping, which is particularly useful for longer jobs or when you can’t interrupt mowing to change batteries. The deck is stamped plastic for lighter weight and easier handling — a plus for users who want a lightweight battery mower for hills and slopes or a quiet cordless 40V Greenworks mower for small yards.
Pros and Cons
Pros
- Dual batteries included (4.0Ah + 2.0Ah) — longer runtime and flexibility.
- Twin blade design for improved cutting, mulching and bagging.
- Maintenance-free operation — no gas/oil and minimal upkeep.
- Auto switch / Smart Cut technology keeps performance stable across varying grass thickness.
- Lightweight 20" deck makes it easy to maneuver and store.
Cons
- Deck material is plastic/stamped, not heavy-duty metal — may feel less solid than metal decks.
- Brushless motor: No — still powerful but not the most efficient motor technology.
- Best suited for yards up to ~1/3–1/2 acre; may require extra batteries for larger properties.
Who Should Buy This Product
This mower is a great match if you:
- Have a small to medium yard (up to ½ acre) and want a 20 inch battery mower that’s easy to push and store.
- Prefer a Greenworks battery mower with a shared-platform battery system and plan to use other Greenworks 40V tools.
- Need a quiet cordless 40V Greenworks mower for small yards that mulches and bags well.
- Want a near maintenance-free alternative to gas — no oil, no gas, less vibration.
If you’re actively searching to order Greenworks battery mower or looking for the best price Greenworks 40V mower, keep an eye out for bundles and seasonal discounts. For those who want the batteries included, the Greenworks mower bundle 4.0Ah 2.0Ah is often the best value.
Comparison with Similar Products
Compared to mid-range gas push mowers, the Greenworks 40V mower offers instant starts, quieter operation and far less maintenance. Versus single-battery electric mowers, its dual battery ports and auto-switch give a runtime advantage that makes it more practical for larger small yards. If you want a heavier-duty metal-deck mower for rugged terrain, commercial units will outperform it, but they come with more maintenance and higher cost.
For shoppers searching terms like Greenworks cordless mower with battery or Greenworks 20 inch mower for sale, this model stands out for battery inclusion and the twin blade design.
Frequently Asked Questions
How long will the batteries last?
Run-time varies with grass thickness and conditions, but with both the 4.0Ah and 2.0Ah batteries you can expect up to around 45–70 minutes total depending on load and Smart Cut usage.
Can I buy extra batteries?
Yes — Greenworks sells additional 40V batteries which are compatible across their 40V G-Max lineup. Extra batteries are recommended if you have closer to ½ acre or thicker turf.
Is it easy to switch between mulching and bagging?
Yes — the twin blades help with effective mulching and bagging. Most users report straightforward transitions between modes.
Final Verdict
The Greenworks 40V mower — specifically the 20" Twin Blade model with 4.0Ah + 2.0Ah batteries — is a compelling choice for homeowners who want a reliable, quiet, and low-maintenance mower for small to medium yards. Its twin-blade design, dual-battery port with auto-switch, and lightweight deck make it user-friendly and efficient. If you want to buy Greenworks 40V mower as a replacement for a gas push mower or to complement a Greenworks battery tool set, this model delivers excellent value.
Looking for a Greenworks mower near me? Search local retailers or use the Amazon link above to order Greenworks battery mower and check availability, pricing, and any Greenworks mower discount offers.