DeWalt 21.5-inch Self-Propelled Lawn Mower

DeWalt DCMWSP255 21-in self-propelled lawn mower

DeWalt Continues Electric Lawn Mower Line with the 21.5-inch Self-Propelled Model

We love watching battery-powered lawn equipment mature each year as more and more manufacturers create new products and improve others. DeWalt is tackling the runtime issue with two new lawn mowers. The DeWalt DCMWSP255Y2 and DCMWSP255U2 21.5-inch self-propelled lawn mower each come with two different battery options. Will these options prove significant enough to deliver just the right amount of runtime to suit your yard?

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DeWalt 21.5-inch Self-Propelled Lawn Mower – The Big Deal

This is a rear-wheel drive self-propelled lawn mower with auto-sensing technology. That adjusts the brushless motor driving the blade so that the speed (RPM) varies based on the thickness of the grass.

DeWalt DCMWSP255Y2

No matter where you live, the DeWalt DCMWSP255 should let you cut the grass to your preferred height. The lawnmower has a variable cutting height range of 1.5 to 4-inches. As with many lawn mowers, you can choose to mulch or bag your grass. DeWalt also offers a true side discharge option (with chute) as well.

Another notable feature is the fold-over handle. While almost standard on consumer-level mowers now, it makes it easy to transport and store your tool when you put it up for the week (or season). With the handle folded, you can store the mower upright. In that position, it takes up roughly 70% less space.

DeWalt DCMWSP255Y2 vs DCMWSP255U2 Model Options

DeWalt offers up this 21-inch self-propelled lawn mower with two battery options. The DeWalt DCMWSP255Y2 includes two 12Ah 20V batteries and gets up to 70 minutes of runtime. DeWalt DCMWSP255U2 includes two 10Ah 20V batteries and mows for up to 60 minutes.

DeWalt DCMWSP255Y2DeWalt DCMWSP255U2
Batteries included2 x 20V, 12Ah2 x 20V, 10Ah
Mowing time (estimated)70 min.60 min.
Retail price$749$669
DeWalt DCMWSP255U2 10Ah batteries

Additional Features

  • Push-button start
  • Self-propelled
  • 11-inch rear wheels

DeWalt 21.5-Inch Self Propelled Lawn Mower Price

The DCMWSP255Y2, with a 70-minute runtime, retails for $799. The 60-minute runtime version, the DCMWSP255U2, has a retail price of $669. DeWalt backs each purchase with a 3-year limited warranty.


  • Model: DeWalt DCMWSP255Y2/DCMWSP255U2)
  • Power source (DCMWSP255Y2/DCMWSP255U2): 2 x 20V 12Ah/10Ah batteries
  • Dimensions (LxWxH): 21.5 x 23.82 x 17.38 inches
  • Cutting width: 21 inches
  • Rear-wheel size: 11 inches
  • Front-wheel size: 8 inches
  • Deck material: 15 gauge steel

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