Greenworks 40V 21in Push Lawn Mower, 5.0 Ah Battery and Charger

The Greenworks 40V 21in Push Lawn Mower is a cordless walk-behind mower built for homeowners who want to maintain their grass without gas, pull cords, or restrictive power cables. Equipped with a 5.0 Ah battery and dedicated charger, this model relies on a clean battery system to power through yard upkeep. It is well suited for residential lawns where a wide cutting path and quiet cordless operation make outdoor work easier.

At the heart of the mower is a 21-inch steel deck paired with a brushless motor. The broad steel deck allows you to handle large areas of grass quickly and easily with fewer passes across the lawn. Inside, the brushless motor design provides more torque for tough cutting tasks while running quietly and offering a longer motor life. To keep your workflow moving, the mower features a dual battery port setup. One battery actively fuels the mower while the second slot enables a spare battery to be stored right on the machine, saving you a trip to the garage when power runs low.

Versatility is built directly into the cutting system through a 3-in-1 clipping disposal setup. You can choose to mulch grass clippings back onto the lawn, collect them in the rear bag, or use the side discharge feature depending on your grass condition. When your mowing routine is finished, the mower transitions to storage efficiently. Its vertical storage feature lets you store the mower upright, utilizing up to 70 percent less space in your garage. Additionally, the included 40V battery works with over 75 other Greenworks 40V outdoor tools, including trimmers, blowers, and chainsaws.

While the mower offers strong convenience features, buyers should consider a few clear limits directly from the specifications. The maximum runtime of up to 60 minutes applies to a fully charged 5.0 Ah battery, but actual runtime varies based on grass condition and operator technique. Because this is a push lawn mower, operating it across large or uneven terrain requires manual pushing. Furthermore, while the design features dual battery ports to store a spare, it includes one 5.0 Ah battery in the box, meaning a second battery must be acquired separately if you want to populate the storage port immediately.

Verdict: This Greenworks 40V mower is a practical choice for homeowners seeking a quiet push mower with a durable 21-inch steel deck. Its 3-in-1 clipping options, space-saving vertical storage feature, and 40V tool system compatibility make it a reliable option for home lawn care.

• Deck Size: 21-inch steel deck
• Motor Type: Brushless motor
• Power Source: 40V cordless battery system
• Battery Included: 5.0 Ah battery with charger
• Maximum Runtime: Up to 60 minutes (varies based on grass condition and operator technique)
• Clipping Options: 3-in-1 (mulch, rear bag, side discharge)
• Battery Storage: Dual battery port design
• Storage Feature: Vertical storage (up to 70% space saving)
• System Compatibility: Works with 75+ Greenworks 40V tools
• Warranty: 3-year limited tool and battery warranty

A great fit if you:

• Want a cordless push mower with a wide 21-inch steel deck to cover broad yard areas quickly.
• Prefer a quiet brushless motor that delivers solid torque without dealing with gas or cords.
• Need flexible clipping options so you can switch between mulching, rear bagging, or side discharge.
• Have limited garage or shed room and need the up to 70 percent space savings of vertical storage.
• Already own or plan to build a collection of tools within the Greenworks 40V lineup.

Consider something else if you:

• Require a self-propelled drive mechanism to assist with pushing up steep slopes or hills.
• Need continuous mowing beyond 60 minutes without purchasing a secondary battery for the spare port.

Confirm on the listing:

• Check whether the expected runtime of up to 60 minutes aligns with the size of your lawn.
• Confirm your garage overhead and floor space to ensure vertical storage fits your storage area.
• Verify that the 5.0 Ah battery and charger are included in your selected package option.
• Check if you own additional Greenworks 40V batteries if you want to use the onboard dual port storage right away.

How to compare your options: Focus on deck width, motor design, and battery system ecosystem when evaluating cordless mowers. A 21-inch steel deck cuts wider swaths than smaller decks, while a brushless motor provides quiet operation and higher torque. If garage storage space is at a premium, vertical storage capabilities are an important factor to consider. Make sure to compare warranty terms as well, such as the 3-year limited tool and battery warranty provided here.

Fully charge the included 5.0 Ah battery before your first mowing task to maximize run-time. Keep in mind that tall or thick grass conditions will alter total operating time, so adjusting your cutting pace can help manage battery performance.

Select your preferred grass clipping management setup before starting your lawn. Install the rear bag for collection, configure the mulching option to feed nutrients back to your yard, or use the side discharge function for higher grass.

If you own a second Greenworks 40V battery, place it in the secondary onboard port slot. This keeps a backup battery on hand so you can switch power sources without returning to your garage mid-job.

After each use, clean off loose clippings from the 21-inch steel deck as recommended by the product manual. Stand the unit upright using its vertical storage feature to conserve garage floor space between uses.

How long does the battery last on a full charge?
The 5.0 Ah battery provides up to 60 minutes of runtime. Actual run-time varies based on grass condition and operator technique.

What is the purpose of the dual battery port design?
The dual battery port allows one battery to power the mower while a second battery is stored onboard, saving you a trip to the garage when it is time to switch power sources.

How much storage space does the vertical feature save?
The vertical storage feature enables the mower to stand upright, using up to 70 percent less space in your garage or shed.

What clipping options are supported by the 3-in-1 design?
The 3-in-1 design allows you to mulch, rear bag, or side discharge your grass clippings depending on your lawn care preferences.

What warranty coverage comes with this mower?
It is backed by a Greenworks 3-year limited tool and battery warranty for long-term ownership confidence.