DEWALT 20V* Lithium-ion Battery Powered Backpack (Tool Only), 4 Gallons
Best for
Best 4-gallon+ for large properties
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 1 trusted source
Current price
$248.92
Updated Jun 27, 2026 · 1 min read
Sources behind this verdict
10 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the DEWALT 20V MAX backpack sprayer is the premium battery pick for owners already invested in the DEWALT battery platform. The r/Dewalt community is effusive, with one long-time user calling it 'the best damn backpack sprayer I've ever used' after switching from a FlowZone, and others reporting no leaks while covering a full half-acre. Coverage on thelawnforum noted spraying a full 4 gallons on a single charge with battery to spare, and the 4.6-star average across roughly 332 Amazon ratings corroborates the positive picture.
What reviewers liked
- Enthusiastic r/Dewalt consensus on power, output volume, and leak-free operation
- Sprays a full 4-gallon tank on one charge per thelawnforum notes
- 4.6/332 Amazon average backed by Home Depot retailer reviews
- Shares batteries with the broader DEWALT 20V platform
Where it falls short
- Reviewers note it weighs roughly 40 pounds when full
- Tool-only pricing near $250 is the highest in this pool
- Requires DEWALT 20V batteries not included in the tool-only package
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Across the reviewers we read, the DEWALT 20V MAX backpack sprayer is the premium battery pick for owners already invested in the DEWALT battery platform. The r/Dewalt community is effusive, with one long-time user calling it 'the best damn backpack sprayer I've ever used' after switching from a FlowZone, and others reporting no leaks while covering a full half-acre. Coverage on thelawnforum noted spraying a full 4 gallons on a single charge with battery to spare, and the 4.6-star average across roughly 332 Amazon ratings corroborates the positive picture.
The recurring caveats are weight and cost. Reddit and cpopowertools reviewers both note that fully loaded it approaches 40 pounds, and the tool-only listing near $250 is the steepest in this pool, plus you must already own (or buy) the 20V batteries. For buyers in the DEWALT ecosystem who spray large areas regularly, the trust-weighted consensus is very strong; for everyone else, the value equation is harder.
- Heavy-duty nylon-reinforced hose effectively avoids kinking
- Variflo technology efficiently adjusts the flow of operator
- Triple-filtration system helps minimize clogging
Fully loaded with a 4 gallons of fluid and battery, it probably weigh about 40 pounds. The shoulder and waist straps help the load distribute well.
I got this backpack sprayer for weeds. Nuked the entire 1/2 acre lawn with it during the lawn reno and had plenty of battery left. It has ...
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“Dewalt 4 Gallon Powered Backpack Sprayer 190742 20V ...” · YouTube
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