40V Cordless Lawn Mower Compatible with Dewalt 2x20V MAX Battery, 14 Inch Electric Lawn Mower with 35L Grass Bag, 6-Position Height Adjustment, Foldable Push Mower for Yard (Tool Only) Review

Overview

The DEWALT 40V Cordless Lawn Mower is a compact, lightweight push mower designed to run on two 20V MAX DEWALT batteries (sold separately). With a 14-inch cutting deck, 35-liter grass bag, and six-position height adjustment, it’s built for small to medium lawns and tight spaces where maneuverability matters more than raw power. This is a “tool only” model, so it’s best for existing DEWALT battery owners who want to add a mower to their cordless lineup without buying another charger and pack.

Who Should Buy This

Small-lot homeowners with 1/8 to 1/4 acre lawns – The 14-inch deck is perfect for modest yards where a full-size 21-inch mower feels like overkill. You’ll get clean cuts without wrestling a heavy machine.

DEWALT 20V MAX battery ecosystem users – If you already own DEWALT drills, saws, or trimmers, this mower uses the same batteries. No new charger needed, and you can swap packs from other tools in a pinch.

Homeowners who hate gas cans – No oil, no stale fuel, no pull cords. Push a button, and you’re mowing. It’s quieter than gas and requires almost zero maintenance.

Apartment or townhouse dwellers with postage-stamp yards – This mower folds flat for vertical storage, slides under a workbench, and fits in a car trunk. Perfect for small patios or community green spaces.

Key Features Breakdown

14-inch steel cutting deck – This is a narrow deck, which means fewer passes on wide lawns but excellent agility around flower beds, fences, and garden edges. The steel construction feels durable and won’t crack like some plastic decks.

6-position height adjustment (1–3 inches) – A single lever lets you dial in cut height from 1 inch (short, golf-green style) to 3 inches (healthy cool-season grass). The range covers most common grass types, but you won’t get the super-low 0.5-inch cuts some Bermuda lovers want.

35-liter grass bag – For a 14-inch mower, this bag is generous. You’ll get about 4–5 passes on a typical small lawn before emptying. The bag clips on securely and lifts off easily. No zippers or flimsy hooks.

Compatible with DEWALT 20V MAX batteries (tool only) – The mower uses two 20V batteries in series to create 40V of power. This is a clever design that lets you use existing 20V packs. With two 5Ah batteries, expect about 25–30 minutes of runtime on medium-height grass.

Foldable design – The handle collapses with a single latch, and the mower stands upright. Storage footprint is about 2 square feet. Great for garages with limited floor space.

Brushless motor – Brushless motors are more efficient and last longer than brushed ones. This one delivers consistent torque even as the battery drains, so your final pass isn’t slower than your first.

Pros

• Battery compatibility is a game-changer – If you already own DEWALT 20V tools, you can run this mower with batteries you already have. That’s a huge cost saving over proprietary systems.
• Excellent maneuverability – The 14-inch deck and lightweight frame (under 30 pounds) make it easy to pivot around trees, navigate tight corners, and push up gentle slopes.
• Quiet operation – At roughly 70 dB, it’s quieter than a gas mower and won’t disturb neighbors or wake sleeping kids. You can mow early morning without apology.
• Simple height adjustment – One lever, six positions, no tools required. It clicks into place with satisfying precision.
• Folds flat for storage – Takes up less space than a bicycle. Ideal for small sheds, garages, or apartment balconies.
• Solid build quality – Steel deck, rubberized handle grips, and reliable battery latch. Feels more premium than the price suggests.

Cons

• Batteries not included – At $179.99, you’re paying for the mower only. If you don’t already own DEWALT 20V batteries and a charger, add at least $100–$150 for two 5Ah packs and a charger.
• 14-inch deck is limiting – You’ll make more passes than with a standard 21-inch mower. On a 1/4-acre lawn, expect 20–25 minutes of mowing instead of 15. Not a dealbreaker, but worth knowing.
• No self-propulsion – This is a push mower. On flat ground it’s fine, but if your yard has steep hills or you have mobility issues, you’ll want a self-propelled model.
• Grass bag can be finicky with wet grass – Like most baggers, damp clippings clump and fill the bag faster. Plan to mow when grass is dry, or expect to empty the bag more frequently.

Bottom Line

The DEWALT 40V Cordless Lawn Mower is a smart, practical choice for DEWALT tool loyalists with small, flat lawns who want a quiet, gas-free mowing experience. It’s not a powerhouse—the 14-inch deck and lack of self-propulsion limit it to smaller yards—but for its target audience, it delivers exactly what’s needed: reliable cutting, easy storage, and seamless battery integration. If you already own DEWALT 20V batteries, this is a no-brainer at $179.99. If you’re starting from scratch, factor in the cost of batteries before pulling the trigger.

Frequently Asked Questions

Can I use a single 20V battery instead of two? No. The mower requires two 20V batteries connected in series to reach the 40V operating voltage. It will not run on one battery alone.

How long does the battery last? With two 5Ah 20V MAX batteries, expect 25–30 minutes of runtime on medium-height grass. With smaller 2Ah packs, runtime drops to about 12–15 minutes. For a typical 1/8-acre lawn, two 5Ah batteries should finish the job.

Will this mower handle thick, tall grass? It handles normal growth well, but if your grass is over 6 inches tall or very dense (like St. Augustine or thick fescue), you’ll need to take lighter passes or mow more frequently. The brushless motor has decent torque, but the 14-inch deck limits the volume it can process at once.