DeWalt 20V MAX 21" Review

The DeWalt 20V MAX 21" self-propelled mower takes a rugged, no-nonsense approach to cordless mowing. With a steel deck, rear-wheel drive, and dual 20V MAX batteries, this mower is designed to deliver durability and cut power — especially appealing if you already use DeWalt tools.

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Key Specs & Features

• Power: Dual 20V MAX batteries (40V combined)
• Deck: 21" steel cutting deck
• Runtime: Up to ~60 minutes (with included 2 × 10Ah packs)
• Cutting Height: 6 settings (1.5" – 4")
• Drive: Rear-wheel self-propel
• Weight: ~91 lbs
• Modes: Mulch, bag, or side discharge

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Performance & Build Quality

DeWalt’s mower stands out with its heavy-duty steel deck, which feels sturdier than most plastic-bodied cordless competitors. The tradeoff is weight — at over 90 lbs, it’s on the heavier side. Fortunately, the rear-wheel self-propel system keeps it manageable, even on slopes.

Cut quality is consistent, with solid mulching and bagging performance. Runtime is competitive thanks to the dual 10Ah packs, and you get the added bonus of cross-compatibility with DeWalt’s huge 20V MAX tool line.

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Hands-On Testing

In our usage, three things stood out:

1. Deck Strength: The steel construction shrugged off bumps and dings that would dent lighter mowers.
2. Drive Feel: Self-propel engaged smoothly without jerks, keeping pace comfortably during longer mowing sessions.
3. Battery Swap: Using the same batteries as DeWalt drills, saws, and blowers makes yard tool integration painless.

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Pros & Cons (At a glance)

Pros

• Premium-feeling steel deck
• Smooth rear-wheel self-propel
• 20V MAX ecosystem compatibility
• Long runtime with 10Ah batteries

Cons

• Heavy at 91 lbs
• Higher upfront cost
• Folding handle not as compact as Toro’s SmartStow

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Price & Value

At around $749 with two 10Ah batteries and charger, this mower is one of the pricier cordless 21-inch models. That said, the steel deck and dual high-capacity batteries justify much of the cost, particularly for users already in the DeWalt ecosystem.

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Final Verdict

The DeWalt 20V MAX 21" self-propelled mower is a rugged, battery-compatible option for homeowners who want durability and reliable self-propel performance. It’s heavier and pricier than some competitors, but its steel deck and cross-compatibility make it a smart buy for DeWalt tool owners.

Best for: Homeowners already invested in DeWalt 20V MAX tools who value a durable steel mower with smooth self-propel drive.