VAXMAY Battery Powered Backpack Sprayer 4.2 Gallon, 120 PSI Electric Garden Sprayer

The VAXMAY 4.2-Gallon Battery Powered Backpack Sprayer is an electric yard tool designed to handle weed control, fertilizer application, and general garden watering without manual pumping. Powered by a 3800 RPM motor, it delivers consistent spraying pressure up to 120 PSI across lawns, garden beds, and larger agricultural areas.

Power versatility stands out on this unit. It comes with a 2.6Ah 20V rechargeable battery and charger right out of the box, offering enough runtime for up to 16 tank refills on a single charge. If you need to keep working on large properties, you can also slide in your own DeWalt 20V or Milwaukee 18V batteries. A digital voltage screen keeps track of remaining power, while an automatic shut-off triggers below 14V to protect your battery packs from over-draining.

Application flexibility is supported by two specialized wands and five mist nozzles. You get a telescoping stainless steel wand that extends up to 39.3 inches with a trigger lock for extended overhead or ground reach, alongside a 30-inch corrosion-resistant fiberglass wand designed for harsh chemicals. Adjusting between broad coverage, fine misting for delicate plants, and concentrated streams for distant weeds requires only a quick nozzle swap.

Carrying a full 4.2-gallon tank requires good support, which this unit addresses with wide padded shoulder straps, breathable back padding, and dedicated lumbar support. The transparent tank includes clear measurement markings so you can easily track fluid levels while mixing or spraying. As for trade-offs, carrying more than four gallons of liquid creates noticeable weight on your back, and the product listing does not provide the sprayer empty weight or total hose length.

Verdict: The VAXMAY Backpack Sprayer is an excellent choice for homeowners and property managers who want strong 120 PSI output and the convenience of using standard power tool batteries. Its dual-wand setup and long runtime make it well suited for extensive lawn treatments and garden care.

• Tank Capacity: 4.2 gallons
• Maximum Pressure: 120 PSI
• Motor Speed: 3800 RPM
• Included Battery: 2.6Ah 20V rechargeable
• Battery Compatibility: DeWalt 20V and Milwaukee 18V
• Wand Types: Telescopic stainless steel (up to 39.3 inches) and 30-inch fiberglass
• Nozzle Count: 5 mist nozzles
• Warranty: 1-Year

A great fit if you:

• Own DeWalt 20V or Milwaukee 18V power tools and want cross-compatible battery use.
• Need high-pressure output up to 120 PSI for weed control or fertilizing large yards.
• Want multiple application options, including a chemical-resistant wand and five spray nozzles.
• Prefer an electric backpack model to eliminate constant manual hand-pumping.

Consider something else if you:

• Need a small, lightweight handheld sprayer for only a couple of indoor potted plants.
• Find carrying large, multi-gallon backpack tanks too physically demanding.

Which power tool batteries work with this sprayer?
The sprayer is compatible with DeWalt 20V and Milwaukee 18V batteries, in addition to the included 2.6Ah 20V battery.

How long does the battery last on a single charge?
A single charge provides enough runtime to spray up to 16 full tank refills.

What wands are included in the package?
You get two wands: a stainless steel telescoping wand that extends up to 39.3 inches with a trigger lock, and a 30-inch fiberglass wand designed for chemical applications.

Does the sprayer protect batteries from over-draining?
Yes, it features low-voltage protection that automatically shuts off the unit below 14V to help maintain battery health.