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4-Gallon Battery Powered Backpack Sprayer for DeWalt 20V Bare Tool

Based on 109 reviews
Condition: New
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$116.99
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Arrives Monday, Nov 2
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At a glance

Condition
New
Model
EF-20BS
Color
Yellow / Black
Material
Plastic, Stainless Steel
Tank Volume
4 gal
Item Dimensions W x H
10"W x 22.5"H
Hose Length
48 in
In the box
1 x 21-inch non-corrosive stainless steel wand that extends up to 40 inches1 x 4-Gallon Backpack Sprayer Body1 x Multiple Nozzle Set ( Include a butterfly single-head nozzle, a F type dual nozzle, a three-shower nozzle, a five-hole nozzle, a metal nozzle)1 x Pro-Grade Ergonomic Harness System (includes wide, padded shoulder straps and a critical adjustable hip belt)1 x reinforced hose with strain relief prevents kinking

Features 7

  • COMPATIBLE WITH DEWALT 20V MAX POWER SYSTEMS (TOOL ONLY): Locks securely with standard 20V MAX cordless platforms, including DCB200, DCB203, DCB204, DCB205, DCB206, and DCB208. IMPORTANT: Designed with a compact, weather-resistant lid, this sprayer accommodates power setups up to 8.0Ah (DCB208). Please note: Oversized multi-voltage platforms and large-format units larger than DCB208 (e.g., 10Ah or 12Ah) will not fit
  • EXTENDED RUNTIME & HIGH EFFICIENCY: Powered by a 40W electric motor, this 4-gallon backpack sprayer delivers exceptional energy savings. A single 5.0Ah power pack provides up to 2.5 hours of continuous spraying (approx. 100+ gallons per charge), ideal for large properties and landscaping
  • DIAPHRAGM PUMP & 0-90 PSI VARIABLE PRESSURE: The reliable diaphragm pump and adjustable pressure knob let you fine-tune the 0.9 GPM flow. Switch instantly from a low-pressure mist for delicate watering to a high-pressure stream with a 20-25 ft vertical reach for applying lawn nutrients
  • TELESCOPING WAND & 5 VERSATILE NOZZLES: Features a 21-inch non-corrosive stainless steel wand that extends up to 40 inches. Includes a reinforced hose with strain relief to prevent kinking, plus 5 specialized nozzles (Butterfly, F-type, Three-shower, Five-hole, Copper) for versatility

Description

Q1: Does this sprayer come with a battery and charger? A: No, this is a "Tool Only" unit. It does not include a battery or a charger. You will need to use your existing standard DeWalt 20V MAX Lithium-Ion battery to operate it. Q2: Will my DeWalt 20V/60V FlexVolt battery or 6.0Ah battery fit in the compartment? A: No, they will not fit. To protect the battery from moisture and dust, the unit features a fully enclosed and sealed battery compartment. It is specifically designed to fit standard DeWalt 20V MAX batteries up to 5.0Ah (such as DCB200, DCB203, DCB204, and DCB205). Larger capacity batteries (6.0Ah+) and FlexVolt batteries are physically too bulky for the protective lid to close and lock securely. Q3: How should I clean the sprayer after using fertilizers or other solutions? A: Proper maintenance is crucial for maximizing the lifespan of the diaphragm pump and seals. After each use, you must never leave solutions sitting in the tank overnight. Please empty the tank completely, then fill it with up to 4 gallons of clean water. Run the sprayer to flush the clean water through the pump, hose, and wand. Repeat this flushing process 2 to 3 times to ensure all residue is completely cleared out and to prevent future clogging. Q4: How far can this sprayer shoot? I need to reach the second story of my house and tall trees. A: When adjusted to the maximum 90 PSI high-pressure setting, the sprayer can reach up to 20–25 feet vertically. This makes it highly effective for spraying tall tree canopies, second-story siding, or high windows without needing a ladder. Q5: How long will a standard 5.0Ah battery last on a single charge? A: A fully charged 5.0Ah battery provides up to 2.5 hours of continuous spraying. This allows you to spray over 100 gallons of liquid (approximately 25 to 30 full 4-gallon tank refills) before needing to recharge, making it perfect for large properties. Q6: Is the spray pressure adjustable, or is it just one speed? A: It is fully adjustable! The unit features a variable pressure dial that allows you to smoothly adjust from 0 up to 90 PSI. You can instantly dial it down for a gentle mist for delicate greenhouse plants, or turn it up for a high-pressure stream to clean siding and decks. Q7: Can I use wettable powders or harsh solutions in this tank? A: Yes. The sprayer is equipped with a heavy-duty Diaphragm Pump, which is much better at handling wettable powders without clogging compared to standard gear pumps. It also features premium Nitrile/FKM seals and a UV-protected tank that safely handle standard liquid fertilizers, plant nutrients, and water-soluble solutions. (Note: Flammable liquids should never be used). Q8: What kind of nozzles does it come with? Is the wand made of plastic? A: The wand is made of non-corrosive, heavy-duty stainless steel (telescoping from 21 to 40 inches). The sprayer includes 5 specialized nozzles to cover all applications: a Butterfly Single-head, F-type Dual-head, Three-shower, Five-hole, and a Copper Nozzle. It also features a universal connection for aftermarket attachments. Q9: How heavy is this backpack when completely full of water? A: Four gallons of liquid weighs approximately 33.4 lbs. Combined with the dry weight of the machine and the battery, the total weight will be around 43–45 lbs when fully loaded. However, our pro-grade deluxe harness—featuring a breathable mesh back pad, wide padded shoulder straps, and an adjustable hip belt—helps distribute this weight evenly across your body to significantly reduce fatigue. Q10: Do I have to manually pump this at all like traditional sprayers? A: Not at all. This is a fully automatic, battery-powered electric sprayer. The 40W electric motor and diaphragm pump do 100% of the work. Just squeeze the handle and spray, completely eliminating the arm and shoulder fatigue associated with traditional manual pump-action backpack sprayers.

Specs 21

Brand Paxwrenx
Tank Volume 4 gallons
Color Yellow / Black
Recommended Uses For Product Flower bed care, Garden maintenance, General purpose spraying, Greenhouse use, Lawn care, Outdoor cleaning, Property maintenance, Soil moisture application, Surface spraying, Tree & shrub care, Watering
Material Plastic, Stainless Steel
Brand Name Paxwrenx
Model Name 20V Max Battery Powered Backpack Sprayer
Model Number EF-20BS

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


Game Changer for Yard Work
I couldn’t be happier with the Paxwrenx 4-Gallon Battery Powered Backpack Sprayer. The fact that it’s compatible with my DeWalt 20V Max batteries was the main reason I chose it—and it did not disappoint. Setup was quick and straightforward, and the build quality feels solid right out of the box. The battery-powered operation is a huge upgrade from manual pumping—consistent pressure, no fatigue, and it saves a ton of time, especially for larger areas. The 4-gallon capacity is perfect for my needs, and the backpack design is surprisingly comfortable, even when full. The straps are well-padded and distribute weight nicely. I’ve used it for weed control, fertilizer, general yard maintenance, and insect control around the house, including carpenter bees, and it handles everything with ease. One thing that really stood out is the strong, consistent pressure—it has no problem reaching the eaves on my second-story home, which makes treating siding and upper areas incredibly easy without needing a ladder. I also really like the stainless steel telescoping wand—it feels durable and extends easily for added reach. The brass sprayer nozzle and brass connector are a nice upgrade over plastic components and give it a more professional, long-lasting feel. The included variety of spray tips is a big plus too, making it easy to switch between different applications. The built-in battery indicator is another great touch—it makes it easy to keep an eye on remaining power so you’re not caught off guard in the middle of a job. Spray pattern is adjustable and consistent, with good reach and even coverage. Battery life has been excellent so far—I can get through multiple tanks on a single charge. If you already have DeWalt batteries, this is a no-brainer. Even if you don’t, it’s still a great value for the performance you get. Highly recommend! ... show more
Reviewed in the United States on June 2, 2026 by Doug E.

Great sprayer for the price!
I’ve been using this 4-gallon battery-powered backpack sprayer for a bit now, and it’s been a really solid addition to my lawn care setup. The biggest advantage for me is the DeWalt 20V battery compatibility. I already have several DeWalt batteries, so being able to just plug one in and go is incredibly convenient—no need to buy into another battery system. The adjustable pressure (0–90 PSI) is a great feature. Whether I’m doing light watering, applying weed killer, or tackling heavier jobs, I can dial it in exactly how I need it. It gives you a lot of control compared to manual sprayers. Another standout is how lightweight and comfortable it is for a backpack sprayer. Even when it’s full, the straps distribute the weight well, and I can use it for extended periods without it feeling like a burden. The long spray wand/nozzle is also super helpful. It extends far enough to reach awkward areas without constantly repositioning, which saves time and effort. What really impressed me is the battery life—getting over 100 gallons per charge feels accurate in real-world use. I can get through multiple jobs before needing to swap batteries. Overall, this sprayer is versatile, efficient, and easy to use. It’s perfect for lawn care, spraying chemicals, or even general outdoor cleaning. If you already use DeWalt batteries, this is an easy recommendation. ... show more
Reviewed in the United States on April 9, 2026 by Lori Becker-Cassady

Excellent performance and back-saving convenience!
This 4-gallon battery-powered backpack sprayer has been a game changer for yard work. The battery power eliminates the tiresome hand-pumping, maintaining strong, consistent pressure from start to finish. The 4-gallon capacity allows for covering a large area in one trip without being overly uncomfortable to wear. Straps hold up well, and it makes spraying weed killer or fertilizer completely hassle-free. Highly recommend if you want to save your arms and get the job done twice as fast! ... show more
Reviewed in the United States on August 27, 2026 by David Brackett

Works great! Only needs improved strap end.
The sprayer works great! I was able to get my yard and my neighbors yard completed in a quarter of the time it took with my handheld 1-gal manual sprayer. The only negative I found was the ends of the straps easily come out of the plastic holder for adjusting length, causing it to come apart when you are trying to out it on. Other than that, it does extremely well, works great with the DeWalt battery as advertised, and helps get the job done quickly. ... show more
Reviewed in the United States on August 25, 2026 by Justin McKenzie

Quality of hose and strap buckles.
Sprayer works as intended until the hose splits, witch renders the hose and wand useless because of fitting style. Repaired the hose 3 times and it just kept splitting. Also the strap buckles won't hold position
Reviewed in the United States on August 5, 2026 by Brian

Game-changer for my gravel driveway—sturdy, long-lasting battery, and DeWalt compatible!
I have a pretty big gravel driveway and up till now I've been using a 2 gal pump sprayer. When I saw this 4 gal backpack sprayer that was compatible with the DeWalt batteries that I already have, it was a no brainer for me. The price was right, the compatibility with my DeWalt batteries is a great feature, and after using it on my driveway I can say that the sprayer is pretty sturdy, the battery life was long lasting, I was able to adjust the sprayer speed easily, and after adjusting a few things there weren't any leaks. I'm really glad I ran across this sprayer because it made keeping the weeds out of my driveway so much easier than it has been in the past. I highly recommend anyone who needs a power sprayer to give this one a chance. ... show more
Reviewed in the United States on July 23, 2026 by Pete Dowell

Disappointed
Product does not perform as it should. Power switch doesn’t work, power dial doesn’t work. Works enough to do the job but not as it should.
Reviewed in the United States on June 27, 2026 by Amazon Customer

Time Saver
Awesome machine! Worked great to spread the herbicide. A little clumsy to use to start but once I got going it worked great. Definitely recommend for large jobs to make it go alot faster. Only used it twice, so dont know about long term reliability.
Reviewed in the United States on October 8, 2026 by scott kroening
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