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DeWalt DCM571 54V XR FlexVolt cordless line trimmer with 38 cm cutting width
DEWALT · 54V XR FlexVolt

DeWalt DCM571 Review

A trade-capable 54V FlexVolt brushless trimmer with a 38 cm cut that also takes a brush blade — best value if you already own DeWalt FlexVolt batteries.

In short:The DeWalt DCM571 is a 54V XR FlexVolt brushless line trimmer with a 38 cm cut, 2 mm line, two speed ranges (0–5,100 and 0–5,600 rpm) and an auxiliary handle. It also accepts a brush blade: UK kit versions (DCM571X1) come with a brush-cutter adaptor and blade, and DeWalt sells the DT20654 blade for the bare DCM571N. UK retailers list it at 4.6 kg bare. It suits rough grass, nettles and light scrub, and makes most sense if you already own FlexVolt batteries.

★ 8.2/10 Our rating
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Pros

  • 54V brushless motor with two speed ranges for runtime or power
  • Wide 38 cm cut with 2 mm line
  • Takes a brush blade as well as line, so it copes with light woody growth
  • No fuel, no mixing, no choke routine, and none of the fumes of a two-stroke
  • FlexVolt batteries also run DeWalt's 18V XR tools

Cons

  • Bare DCM571N needs a FlexVolt battery and charger — an expensive start from scratch
  • Runtime per charge trails a petrol tank in heavy growth
  • About 4.6 kg before the battery — heavier than a basic trimmer
  • Overkill if you only need to trim lawn edges

What DeWalt and UK retailers specify

  • Motor: 54V XR FlexVolt, brushless, with two speed ranges (0–5,100 and 0–5,600 rpm).
  • Cutting: 38 cm swath with 2 mm line; an auxiliary handle for two-handed control.
  • Blade: UK DCM571X1 kits include a brush-cutter adaptor and blade; the DT20654 brush blade is listed as the accessory for the bare DCM571N.
  • Weight: 4.6 kg for the bare tool according to UK retailers; the kit figure with battery is higher.
  • Runtime: about 54 min (low) / 44 min (high) with the 3.0 Ah battery, at no load.

Where the DCM571 earns its keep

This is not a lightweight cordless strimmer wearing a brush cutter’s badge. Built on DeWalt’s 54V FlexVolt platform, the brushless motor has the torque to keep a wide 38 cm swath turning through rough grass and nettles where many battery trimmers bog down, and the option of a blade takes it into light scrub.

For anyone who already has FlexVolt batteries from other DeWalt tools, this is where the DCM571 makes sense. There’s no fuel to mix, no choke on a cold morning, and none of the exhaust or two-stroke vibration of a petrol machine. Charge a battery, clip it in, and go.

Where it comes up short

Cost and runtime. A battery won’t match a full tank of petrol for sustained heavy clearing, so a spare is worth having on big jobs. Starting from scratch, the FlexVolt battery and charger add a lot to the price, and at about 4.6 kg before the battery it’s heavier than a basic trimmer over a long session.

With the blade fitted, wear the full kit — visor, boots, gloves and hearing protection (see safety gear for brush cutting).

Who should actually buy this

People who already own DeWalt FlexVolt batteries, or trade users who value cordless convenience enough to accept the up-front cost. If you only trim lawn edges, a cheaper trimmer does the job — DeWalt’s own 18V DCM561PBS is one. For genuine land clearing, compare petrol vs battery before buying.

The bottom line

A strong cordless trimmer that can wear a blade, for anyone already invested in DeWalt's FlexVolt batteries — but not the cheapest way in from zero.

DeWalt DCM571 — frequently asked questions

Can the DCM571 cut brambles and woody growth, not just grass?

With a blade fitted, yes — light brambles and scrub. UK DCM571X1 kits include a brush-cutter adaptor and blade, and DeWalt lists the DT20654 brush blade for the bare DCM571N. It isn't designed for saplings; for those, a petrol brush cutter with a harness is the right tool.

Do I need to buy a battery and charger separately?

For the bare DCM571N, yes. The DCM571X1 kit comes with one FlexVolt battery — UK retailers list it with either a 3.0 Ah or a 9.0 Ah pack — and a charger, so check which before buying.

How long does a battery last?

UK retailers quote about 54 minutes on low speed and 44 on high from the 3.0 Ah kit battery, measured at no load. In real cutting it is less, so a spare battery is the practical way to extend a working day.

Our score

8.2/ 10

A strong cordless trimmer that can wear a blade, for anyone already invested in DeWalt's FlexVolt batteries — but not the cheapest way in from zero.

Who this one is for

DeWalt FlexVolt owners who need a trade-grade cordless trimmer that can take a blade for scrub and rough ground

Guides that feature it

Price and availability

A reference exists on these Amazon stores: United Kingdom, United States. Listed is not the same as in stock — availability changes daily.

Details checked on October 26, 2026.

Sources

Specifications: manufacturer sheet and Amazon product page. Prices and availability: Keepa. No product on this site has been physically tested.

How we assess products