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Freedom251 › Blog › 54V FLEXVOLT

DeWALT DCMAS5713X1 Review: Is the 54V FLEXVOLT Split-Boom Kit Worth It?

By Freedom251 Team · · 11 min read

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Verdict: The DeWALT DCMAS5713X1 is a 54V XR FLEXVOLT power head sold with a string-trimmer attachment, designed for owners who want one battery system that can also run a brush cutter, pole hedge trimmer and pole saw. It offers substantial cutting power and useful modularity, but it is a relatively heavy tool and the published kit contents conflict by region. Confirm the suffix, battery size and included accessories on your local listing before buying.

What the DCMAS5713X1 actually is

The DCMAS5713X1 is not merely a trimmer with a shaft that separates for storage. It is a 54V XR FLEXVOLT split-boom power head with a brushless motor and a detachable front shaft. The supplied attachment is a bump-feed string-trimmer head, while the same power head is specified for other DeWALT attachments.

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That distinction matters when comparing prices. A listing for the power head and trimmer attachment is not equivalent to a bare trimmer, and it is not automatically a complete brush-cutting or tree-pruning kit. The DCMASBC1N brush cutter, DCMASPH6N pole hedge trimmer and DCMASPS5N pole saw are separate heads. DeWALT identifies those heads for this system, but the published information does not establish universal compatibility with third-party attachments.

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The “X1” suffix also deserves attention. The model name refers to a kit with one battery, but regional product pages do not agree on that battery’s capacity. Treat the complete SKU, rather than the shared DCMAS5713 family name, as the item you are evaluating.

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Specifications at a glance

Specification Published information Qualification
Tool type 54V cordless split-boom string trimmer kit Brushless XR FLEXVOLT power head with trimmer attachment
Cutting width 38 cm Listed by DeWALT CEE and UK pages
Line 2 mm on the CEE listing; 2.4 mm twisted line on the UK listing Check the manual and local SKU before purchasing replacement line
Feed system Bump feed The head advances line when bumped against the ground
Speed settings Two DeWALT specification for the CEE version
Weight without battery 5.4 kg DeWALT CEE figure
Weight including battery 6.173 kg DeWALT CEE figure; battery and measurement method affect the total
Battery capacity 9 Ah stated in the CEE specifications Regional included-items sections instead list a 3.0 Ah battery
Charge time 75 minutes Manufacturer specification
Runtime Up to 60 minutes Manufacturer claim, not an independently observed result
Independent listing weight 7.3 kg CHOICE’s public listing; its test method and configuration are not shown on the accessible page

Battery and kit-content confusion

The most important buying caveat is the mismatch between the product name and the included-items sections. The CEE page for DCMAS5713X1-QW specifies a 9Ah capacity, while both that listing’s included-items area and the UK DCMAS5713X1-GB page describe one 3.0Ah battery, a DCB118 charger and the grass-trimmer head. Those statements cannot safely be merged into one universal package description.

A 9Ah FLEXVOLT battery and a 3.0Ah battery represent materially different work sessions and replacement costs. They also change the tool’s balance and total weight. Before ordering, check the exact regional suffix, the “included in box” panel, the battery part number and the manual supplied with the seller’s package. Save a screenshot or copy of that specification if the listing is likely to change.

DeWALT’s “up to 60 minutes” runtime statement is associated with a 9Ah battery. It should be read as a maximum under unspecified conditions, not as a guaranteed mowing time. Tall wet grass, thick weeds, a wider cutting path, frequent stops, line advancement and the selected speed all reduce the time available. One owner reviewing the tool through ITS.co.uk reported roughly 45 minutes of heavy work while still having charge remaining, but that is a single personal account rather than a controlled test.

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The 75-minute charging figure is likewise a published specification. If your kit really contains a 3.0Ah battery, its practical session length will not match a 9Ah configuration even though the power head is the same. A second compatible battery may be more useful than trying to make one pack cover a large property, but verify the correct battery and charging guidance for your regional model.

What attachments fit the split boom?

DeWALT names three accessory heads for the DCMAS5713 power head:

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  • DCMASBC1N brush cutter: for heavier vegetation and brush-clearing work where a line trimmer is less efficient.
  • DCMASPH6N pole hedge trimmer: for extending reach when shaping or reducing taller hedges.
  • DCMASPS5N pole saw: for pruning branches from the ground with the appropriate saw head.

These heads are additional purchases, not evidence that every DCMAS5713X1 box contains them. Compatibility should be checked against the exact regional power-head variant, because suffixes can identify different market packages. Do not assume that a third-party attachment will lock into the shaft, transmit power correctly or remain within the manufacturer’s safety approvals.

The split shaft has a practical storage advantage: the tool occupies less length in a vehicle or shed when separated. The trade-off is another coupling point to assemble and keep clean. Inspect the connector, locking mechanism and drive interface each time the shaft is changed; a head that is not fully seated can create vibration, poor power transfer or a safety hazard.

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Cutting setup and expected performance

The 38 cm swath is a sensible middle ground for general grass and weed work. It covers ground faster than a narrow homeowner trimmer while remaining more manageable around beds, posts and fences than a very wide professional clearing head. The two-speed arrangement gives you a way to favour runtime for light edging or use more power in dense growth, although the published specifications do not quantify the difference between the settings.

The bump-feed design is familiar and field-serviceable: when the line becomes short, the operator taps the head on the ground to release more line. One ProductReview.com.au owner found the feed effective but also reported that striking obstacles could release line unexpectedly. That is an individual observation, not a documented failure rate, but it is a reason to keep the head clear of stones, kerbs and metal edging and to inspect line length after impacts.

DeWALT’s CEE page lists 2 mm line, while the UK page calls for 2.4 mm twisted line. Those are not interchangeable assumptions. A line that is too thick can overload the head or motor; one that is too thin may wear rapidly in rough vegetation. Use the diameter and winding instructions in the manual supplied with your exact tool.

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Available owner comments consistently describe strong power, but they also describe weight as a recurring compromise. An ITS.co.uk customer said the trimmer and a separately purchased brush-cutter head delivered superb cutting power, while another said power and battery life were good but the complete tool was quite heavy. A ProductReview.com.au account found the brush-cutter capability useful, yet said thick, tall grass took longer and consumed more battery and line. These reports support a use-case judgment, not a laboratory performance score.

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Handling, balance and edging

DeWALT lists 5.4 kg for the tool without a battery and 6.173 kg with a battery in the CEE specification. CHOICE’s public listing shows 7.3 kg, but it does not expose the configuration or measurement method behind that figure. The difference means you should not compare a bare-tool number with a fully equipped competitor without checking what each manufacturer weighed.

In practical use, the battery sits at the rear while the cutting head and shaft extend forward. That creates leverage even when the scale weight appears acceptable. A harness can transfer part of the load to your body, but fit is personal: one owner reported that the supplied harness did not fit well. Adjust the harness, handle position and shaft length before judging the tool, and stop if your wrists, shoulders or lower back begin compensating for poor balance.

Edging is the task most likely to expose the tool’s handling limits. A long split-boom tool is convenient for open grass and clearing, but it is less nimble than a short dedicated edger around tight corners. Keep the head parallel to the surface, use the lower speed for precise work and avoid forcing the line into hard edging. If your property is dominated by narrow borders, frequent vertical edging and small patches, the modular system’s flexibility may not offset its reach and weight.

How to assemble and use it safely

  1. Confirm the package: Match the full model suffix, battery capacity, charger and included head against the seller’s box contents before opening the kit.
  2. Charge the battery: Use the supplied DCB118 charger or the charger specified for your battery. Allow the pack to finish charging and cool as directed in the manual.
  3. Join the split shaft: Align the shaft sections and fully engage the locking mechanism. Do not operate the tool if the sections can twist or pull apart.
  4. Fit the trimmer head: Install the supplied guard, handle and head exactly as shown in the regional manual. Check that fasteners are tight and the line is wound evenly.
  5. Fit the battery: Slide the charged pack into the power head until it latches. Keep the trigger released while making this connection.
  6. Prepare the area: Remove stones, wire, glass, toys and other objects that could be thrown by the line. Keep people and pets outside the debris zone.
  7. Select a speed: Start on the lower setting for light grass and edging. Move to the higher setting only when the vegetation requires it, because load and speed affect runtime.
  8. Trim with controlled sweeps: Hold the head at the correct angle, advance gradually and let the line do the cutting. Do not use the shaft as a lever against fences, kerbs or trees.
  9. Advance line deliberately: Use the bump-feed action on a clear, suitable surface. If line releases unexpectedly after an impact, stop, remove the battery and inspect the head.
  10. Stop before changing anything: Remove the battery before changing attachments, clearing wrapped grass, servicing the head or transporting the tool.

These steps do not replace the safety instructions for your regional model. The manual controls when its instructions differ from a general operating sequence.

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Where the modular system makes sense

Choose it for a multi-tool battery platform

The strongest reason to buy the DCMAS5713X1 is the possibility of adding other heads later. If you already maintain hedges, prune low branches and clear rough growth, one power head can reduce the number of motors and batteries stored in the shed. The value depends on the price of each additional head and whether you will actually use it; a modular platform is not automatically cheaper than separate dedicated tools.

Choose it for substantial grass and weed cutting

The 54V motor, 38 cm width and owner reports of strong cutting power suit medium-to-large areas and vegetation that overwhelms lightweight trimmers. The brush-cutter option broadens the use case for coarse growth, subject to the correct head and local safety requirements.

Look elsewhere for maximum lightness

At more than 5 kg before the battery in DeWALT’s specification, this is not a featherweight edging tool. Users with small lawns, frequent precision edging or limited shoulder strength may prefer a lighter dedicated trimmer, even if it gives up attachment flexibility.

Check the battery before relying on runtime

A 9Ah configuration can make the “up to 60 minutes” claim plausible for lighter work, while a 3.0Ah included pack will provide a different session. If the listing does not clearly identify the battery, treat runtime and package value as unresolved until the seller confirms them in writing.

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Independent evidence and what it does—and does not—show

CHOICE lists the exact DCMAS5713X1 as a cordless line trimmer for a medium yard and publicly shows specification fields including a 38 cm cutting diameter, 2 mm line and 75-minute charge time. Its page also displays a 7.3 kg weight and a $749 figure. The expert rating, detailed performance results and recommendations are behind member access on the accessible listing, so no score or test conclusion can be responsibly assigned here. The displayed price is not a verified current retail offer.

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The available owner comments are useful for identifying possible trade-offs—weight, harness fit, line behaviour and heavy-grass consumption—but they are anecdotal. No controlled hands-on test establishes a universal runtime, cutting rate, noise level or failure rate for this exact package. DeWALT’s specifications remain the authoritative source for the stated dimensions and claimed runtime, while real results will vary with battery, vegetation, speed and technique.

Buying checklist for the DCMAS5713X1

  • Confirm that the listing is DCMAS5713X1, not a nearby DCM5713 product from another trimmer family.
  • Check the regional suffix, such as the CEE or UK variant, because line diameter and included-items descriptions differ.
  • Verify whether the box contains a 9Ah battery or a 3.0Ah battery, and record the battery model number.
  • Confirm that the DCB118 charger and trimmer head are included if you need a complete working kit.
  • Budget separately for the DCMASBC1N, DCMASPH6N or DCMASPS5N head if you intend to use brush-cutting, hedge-trimming or pole-saw functions.
  • Check the return policy in case the harness, balance or total weight does not suit you.
  • Do not treat a displayed $749 figure from an independent listing as a current, universally available price.
  • Buy replacement line only after checking the manual for your exact regional tool.

Maintenance and common problems

Line feeds too often or not at all

Remove the battery before touching the head. Check that the line is wound in the specified direction and diameter, that the spool is not damaged and that grass or debris is not blocking movement. If the head releases line whenever it contacts an obstacle, reduce contact with hard surfaces and replace worn components rather than continuing to operate it unpredictably.

Runtime is much shorter than expected

First identify the battery actually supplied. Then consider speed setting, grass height, moisture, line diameter, repeated acceleration and whether the battery is cold or near the end of its service life. The 60-minute statement is an “up to” manufacturer claim, so heavy clearing will not reproduce it consistently.

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The tool feels unmanageable

Stop work and refit the harness and auxiliary handle. Make sure the shaft coupling is fully locked and that the cutting head is not carrying a large wad of wet grass. If the balance remains uncomfortable, the problem is likely a mismatch between the tool’s form factor and your task rather than a setting that can be corrected.

Power drops or the motor stops

Remove the battery, clear wrapped vegetation and allow the tool and pack to cool. Inspect the line head and shaft coupling. Persistent cut-outs, unusual vibration or a burning smell require service rather than repeated restart attempts.

Final assessment

The DeWALT DCMAS5713X1 is best understood as a powerful, expandable 54V platform rather than a lightweight lawn trimmer. Its documented 38 cm cutting width, brushless motor, two-speed control and named attachment ecosystem make it attractive for owners who will use more than one head. The same design brings meaningful compromises: substantial carried weight, a less agile feel for edging and uncertainty over what battery the “1 X 9Ah” package actually contains in each market.

Buy it when the local listing confirms the battery and accessories you need, you value the attachment system and your work involves more than occasional fine edging. Pass on it when minimum weight is the priority or when the seller cannot resolve the 9Ah-versus-3.0Ah package discrepancy. In either case, judge the complete regional kit—not just the shared model number—before committing.

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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

54V FLEXVOLTbattery trimmer reviewcordless garden toolsDeWALT DCMAS5713X1split-boom string trimmer

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