40V Cordless Lawn Mower, 17-Inch Walk Behind Lawnmower with 2 x 20V 4.0Ah Battery, Brushless Motor, 6 Cutting Heights, 50L Grass Bag, for Garden/Patio/Yard/Lawn Review

Overview

The 40V Cordless Lawn Mower from Lawnmower is a compact, battery-powered walk-behind mower designed for small to medium-sized yards (up to 1/4 acre). With a 17-inch cutting deck, brushless motor, and two 20V 4.0Ah batteries, it’s built for homeowners who want an affordable, lightweight alternative to gas mowers—no fumes, no cords, no hassle. It’s best suited for tidy, flat lawns where maneuverability and ease of storage matter more than raw power.

Who Should Buy This

• Owners of small to medium lawns (up to 1/4 acre): If your yard is under 2,500 square feet, this mower will handle a full cut on a single charge with battery to spare. Perfect for townhouse patios, suburban front yards, or urban backyards.

• Homeowners who hate gas cans: Tired of mixing oil, dealing with stale fuel, and pulling a starter cord 15 times? This mower starts instantly with a button press and runs cleanly—no fumes, no spills, no engine maintenance.

• Budget-conscious buyers seeking value: At $189.99, it undercuts most 40V competitors by $50–$100. You get two batteries, a brushless motor, and a 50L grass bag for the price of a single-battery model from bigger brands.

• Seniors or anyone with limited strength: Weighing around 35 pounds fully loaded, it’s light enough to push with one hand and easy to lift into a car trunk or shed. The 17-inch deck means less weight and better control on slopes.

Key Features Breakdown

40V System (2 x 20V 4.0Ah Batteries): The mower runs on two 20V batteries in series to deliver 40V power. Each battery is 4.0Ah, giving you 80Wh total—enough for about 30–40 minutes of continuous cutting on a medium height setting. The included dual-port charger refills both in about 2.5 hours. Swap batteries to extend runtime.

17-Inch Cutting Deck: A 17-inch steel deck is narrow enough to maneuver around flower beds, garden edges, and tight fence lines, but wide enough to cover a typical lawn without excessive passes. It’s ideal for irregularly shaped yards or lawns with obstacles.

Brushless Motor: Brushless motors are more efficient and longer-lasting than brushed motors. You get more torque for cutting thicker grass, less heat buildup, and no brushes to replace. This motor is also quieter than gas engines—neighbor-friendly for early morning cuts.

6 Cutting Heights (1.2–3.5 inches): Adjust via a single lever on the deck. The range covers everything from a short, manicured look (1.2 inches) for warm-season grasses to a taller cut (3.5 inches) for cool-season lawns or drought stress. The lever is easy to reach and clicks into each position.

50L Grass Bag: A large-capacity bag that holds about 2–3 bushels of clippings. It’s plastic-framed with a fabric top, so it stands upright when full. The bag attaches with a simple hook-and-latch system and empties easily from the top. Note: The bag’s size means it can be heavy when full, but it reduces trips to the compost pile.

Walk-Behind Design: Manual push (no self-propel). This keeps weight low and price down. On flat ground, it’s easy to push; on hills, you’ll need some arm strength.

Pros

1. Great value for the price: Two batteries, brushless motor, and a decent bag for under $200 is rare. You’re getting 40V performance at 20V prices.

2. Lightweight and easy to store: At ~35 pounds, it’s one of the lightest 40V mowers we’ve tested. Folds flat for vertical storage in a corner or shed.

3. Quiet operation: At 75–80 dB, it’s quieter than a gas mower by a long shot. You can mow early morning without waking the neighbors.

4. Instant start and no maintenance: Push a button, pull the bail handle, and go. No priming, no choking, no oil changes. Perfect for casual users.

5. Decent cut quality on thin to moderate grass: The brushless motor provides consistent blade speed, and the 17-inch deck gives a clean, even cut on fescue, Bermuda, or ryegrass up to about 4 inches tall.

6. Batteries are interchangeable with other tools: Lawnmower-brand 20V tools (like trimmers or blowers) use the same batteries, so you can expand your system without buying new packs.

Cons

1. Not for thick or tall grass: If your lawn is overgrown or has dense, wet grass, the mower will bog down and the bag will clog. You’ll need to take smaller strips or cut twice.

2. No self-propel: On sloped lawns or if you have mobility issues, pushing this manually can get tiring. It’s fine on flat ground, but hills require effort.

3. Bag capacity is large but bag design is basic: The fabric top can sag under heavy loads, and the bag’s attachment hooks feel a bit flimsy. It works, but don’t expect premium build quality.

4. Battery life is modest: On the lowest height setting or in thick grass, you’ll get closer to 20–25 minutes per full charge. For a 1/4-acre lawn, you’ll likely need both batteries to finish a single cut.

Bottom Line

The 40V Cordless Lawn Mower is a solid choice for budget-conscious homeowners with small, flat lawns who want a lightweight, low-maintenance mower that starts every time. It won’t handle overgrown fields or steep hills, and the build quality reflects the price point, but for $189.99, you get a reliable, quiet machine with two batteries and a brushless motor that outperforms many corded electrics. If your yard is under 2,500 square feet and you don’t mind a manual push, this is one of the best values in cordless mowing right now. I’d recommend it over gas mowers at this price for anyone who prioritizes convenience over brute power.

Frequently Asked Questions

Can I use other brand batteries in this mower?
No. The mower uses proprietary Lawnmower-brand 20V batteries with a specific connector. Only use the included batteries or genuine Lawnmower replacements. Third-party batteries may not fit or could damage the electronics.

How long does it take to charge the batteries fully?
The included dual-port charger takes about 2.5 hours to fully charge both 4.0Ah batteries from empty. You can charge them one at a time in the same charger, but it still takes about 1.25