Can it run on both a battery and a power cord?

Yes - that's its core feature. It accepts 18V NiCd or 20V MAX Li-ion DeWalt battery packs, or you can plug the included cord into a standard AC outlet and run it corded with no battery at all.

Is the suction strong enough for pet hair or car detailing?

Owners generally say no. Rated around 31-34 CFM, it's on the weak end for a shop vac, and multiple owners specifically report it struggling with pet hair and full car-interior cleanups compared to a dedicated vacuum.

How do you clean the filter, and does it need replacing often?

The HEPA-rated filter is washable - owners tap it out or rinse it with water rather than buying a replacement. It does clog fairly quickly with regular use, so plan on cleaning it often to keep suction from dropping further.

How long does it hold up under regular use?

Reports are generally positive on durability - one owner described 6 years of regular jobsite abuse without the unit failing. The housing and battery-latch mechanism appear to be the more durable parts of the design, even though suction power is the known weak point.

How does it compare to the Milwaukee M18 FUEL or a Ridgid NXT wet/dry vac?

Both of those are meaningfully stronger on suction - the Milwaukee M18 FUEL line moves around 87-114 CFM depending on tank size, roughly 3x this DeWalt's airflow. Owners who need real cleaning power for a shop or a full vehicle detail consistently recommend stepping up to one of those instead; the DCV581H's advantage is only its cordless-or-corded flexibility and lower price.

DeWalt 20V MAX Cordless/Corded Wet/Dry Vacuum

Wet-Dry Shop Vac

~$180

DeWalt

DeWalt 20V MAX Cordless/Corded Wet/Dry Vacuum

Name: DeWalt 20V MAX Cordless/Corded Wet/Dry Vacuum
Brand: DeWalt
Price: 180 USD
Availability: InStock

This is the shop vac for quick cleanups where dragging out a cord isn't worth it — sawdust off a bench, a spill in the truck bed, a quick pass before a client walks in. It runs on a 20V MAX battery or plugs into the wall, so it doubles as a backup if you're out of juice on both batteries. This is a bare tool: no battery or charger is included, and by the time you add a battery the real cost is well above the sticker price — factor that in. DeWalt publishes 31 CFM as the suction spec rather than a peak HP figure, so you can't compare it apples-to-apples against the corded HP-rated vacs in this list. The 2-gallon tank is genuinely small; independent testing has clocked continuous runtime around 24 minutes on a mid-size battery, though DeWalt doesn't publish an official runtime figure and it varies a lot with battery size. The Gore HEPA filter is rated to catch 99.97% of particles at 1 micron and is washable, which matters if you're vacuuming drywall dust. One owner reported four years of daily jobsite use with no failures — this is a real workhorse for pros who already run the DeWalt 20V platform. The honest caveats: battery runtime is the single biggest complaint in owner discussions, the HEPA filter clogs quickly on fine dust and needs frequent manual cleaning, and one reported unit failed before its first year (a replacement held up fine).

Approx. price

~$180

Suction

31 CFM

Filtration

Gore Wet/Dry HEPA filter, washable and reusable, 99.97% at 1 micron

Best For

DeWalt 20V owners who want a quick-grab vac without a cord

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Specifications

Suction Power

31 CFM

Cordless

Yes

Filtration

Gore Wet/Dry HEPA filter, washable and reusable, 99.97% at 1 micron

Bagged

Type

Wet-Dry Shop Vac

Dustbin Capacity

2 gal

App Control

Warranty

3 years

Model

DCV581H

Highlights

Runs on battery or cordGore HEPA filter2-gallon compact tank

Pros

✓Runs on a 20V MAX battery or plugs into the wall — genuine dual-power flexibility
✓Gore HEPA filter rated 99.97% at 1 micron, and it's washable
✓Small and light enough to keep in a truck cab for quick spills
✓3-year limited warranty plus 1 year of free service
✓One owner reported 4 years of daily jobsite use with no failures

Cons

✗Battery and charger sold separately — the real cost is much higher than the tool-only price
✗Battery runtime is the top owner complaint; roughly 24 minutes in independent testing on a mid-size battery
✗2-gallon tank empties often on anything beyond a quick job
✗HEPA filter clogs fast on fine dust like drywall sanding and needs frequent cleaning
✗No published weight or dimensions

Owner Insights(34 discussions)

The DCV581H's pitch is simple: one small vacuum that runs on either an 18V/20V MAX DeWalt battery or a standard AC cord, so you're not carrying two separate small vacs for quick cleanup. Owner and reviewer sentiment agrees it nails that specific niche - convenience and battery-platform compatibility - while being clear-eyed that it's not a serious cleaning tool once you get past light jobsite debris.

Day to day, the combo functionality is what owners actually use and like: swap in a spent 20V MAX pack from a drill, or plug into a wall outlet when you want to run it longer, without changing anything else about the tool. Reviewers measured it as notably quiet for its class and praised the integrated storage that keeps the crevice tool, wide nozzle, and hose attached to the unit itself. The tradeoff shows up the moment the job gets harder than sawdust and screws: suction sits around 31-34 CFM, which multiple owners describe as inadequate for pet hair, car detailing, or fine drywall dust, and the washable HEPA filter needs frequent cleaning to avoid choking that already-modest airflow even further.

Buy it if you want a genuinely portable combo unit for truck-bed cleanup, small spills, and quick sawdust pickup, and you already own DeWalt 18V/20V batteries. Skip it if you need real suction for pet hair, car interiors, or anything beyond light debris - owners in that camp consistently point to the Milwaukee M18 FUEL PACKOUT wet/dry vacuum or a Ridgid NXT cordless model instead, both of which trade the DCV581H's dual-power flexibility for meaningfully stronger airflow.

Pros

+The combo cordless-or-corded design means one unit replaces both a small shop vac and a battery hand vac - owners specifically call out not needing to keep two separate small vacs on the truck
+Runs on either 18V NiCd or 20V MAX Li-ion packs, so owners with an existing DeWalt battery collection don't need to buy dedicated batteries just for this tool
+One owner reported 6 years of regular jobsite abuse without failure, which owners cite as evidence the housing and switch hold up to daily use
+Quiet for its class - in side-by-side testing it measured only about 3dB louder than a battery-only Milwaukee competitor, noticeably quieter than a typical corded shop vac
+Integrated accessory storage - the crevice tool tucks into the handle, the wide nozzle clips to the front, and the hose wraps around the back - so parts don't get left behind on a truck or in a garage
+The washable HEPA-rated filter can be tapped or rinsed clean instead of replaced, which keeps upkeep costs low for owners who use it often
+At roughly $120-180 for the bare tool, owners consistently call it a compelling price for a combo unit versus buying separate cordless and corded vacs

Cons

−Suction is genuinely weak by shop-vac standards - rated around 31-34 CFM, and multiple owners flatly call this "awful," with one comparing it unfavorably to a cheap handheld vac
−Struggles with pet hair and detailed car interior cleaning - owners doing those jobs report switching to a dedicated vacuum instead
−The HEPA filter clogs quickly under regular use and needs frequent tapping or rinsing to keep suction from dropping further, which is an extra maintenance step compared to a standard foam filter
−Weak on drywall dust and fine sanding debris specifically - several owners note it bogs down faster on fine dust than on coarser jobsite debris
−Small 2-gallon tank and a short 5-foot hose limit it to quick spot cleanup rather than a full room or vehicle
−It's explicitly a compromise tool - one long-time reviewer put it plainly that it's "not really the best cordless vac, nor... the best corded vac"
−Owners doing serious dust collection or full shop cleanup say to skip this and step up to a Milwaukee M18 FUEL or Ridgid NXT model instead