3Gal Lawn Garden Backpack Sprayer Compatible with Dewalt 20V Battery

The Mayoki 3-Gallon Backpack Sprayer delivers battery-powered spraying for homeowners and gardeners looking to eliminate manual pumping. Designed specifically for compatibility with Dewalt 20V MAX power tool batteries, this unit includes its own 2.0Ah pack and 2A fast charger, allowing you to treat lawns, apply fertilizer, or spray bleach without hand fatigue.

Performance centers around an adjustable pump system capable of switching between a 45 PSI low-pressure mode and a 79 PSI high-pressure setting. At full power, it outputs a flow rate of 0.33 GPM and reaches spray distances up to 25 feet. The package provides substantial flexibility right out of the box, offering two wands (one stainless steel and one plastic) alongside seven interchangeable nozzles, including a 1.58 mm brass nozzle and a 2 mm plastic nozzle suited for applying beneficial nematodes without clogging.

Battery protection is built into both the tool and the battery housing. The internal circuitry features a low-voltage cutoff that turns the chemical sprayer off if power falls below 14.4V, preventing over-discharge and extending the overall life of your 20V battery packs. On a full charge, the included 2.0Ah battery can spray up to 11 full tanks, totaling 33 gallons of liquid.

Keep in mind that while every unit is factory-inspected for leaks, extreme winter shipping conditions may affect plastic components, though replacement support is offered. The manufacturer also backs the hardware with a 5-year warranty and lifetime component support for nozzles and handles. Note that the listing does not state the overall empty weight of the unit or the length of the hose.

Verdict: The Mayoki 3-Gallon Sprayer is an ideal choice for Dewalt tool owners and gardeners who want effortless, multi-tank chemical application without manual pumping. Its wide pressure range, safety cutoffs, and broad nozzle selection make it a reliable setup for standard yard care.

• Tank Capacity: 3 Gallons
• Maximum Pressure: Up to 79 PSI (with 45 PSI low mode)
• Flow Rate: 0.33 GPM
• Maximum Spray Distance: Up to 25 ft
• Battery Compatibility: Dewalt 20V MAX
• Included Battery: 2.0Ah Lithium-ion
• Included Charger: 2A Fast Charger
• Shutoff Voltage: 14.4V (Low Voltage Protection)
• Nozzle Apertures: 1.58 mm brass, 2 mm plastic (7 nozzles total)
• Wand Materials: Stainless Steel and Plastic (2 wands total)
• Warranty: 5-Year Warranty with Lifetime Component Support

A great fit if you:

• Already own Dewalt 20V MAX batteries and want a compatible garden sprayer
• Need to spray up to 33 gallons without stopping to recharge or pump manually
• Apply delicate solutions like beneficial nematodes that require wide-aperture nozzles
• Want adjustable output pressures between 45 PSI and 79 PSI for varied applications

Consider something else if you:

• Prefer a smaller handheld sprayer for quick indoor houseplant care
• Require an extra-large tank capacity greater than 3 gallons for commercial acreage

Does this sprayer include a battery and charger?
Yes, it comes with a 2.0Ah battery and a 2A fast charger, and it is also compatible with Dewalt 20V MAX batteries.

How much spraying can it do on one charge?
A single charge can spray up to 11 full tanks, which equals 33 gallons of liquid.

Can it be used to apply beneficial nematodes?
Yes, it includes large-aperture nozzles (a 1.58 mm brass nozzle and a 2 mm plastic nozzle) and a 45 PSI low-pressure mode to reduce clogging risks during nematode application.

What safety features protect the battery?
The sprayer and battery have built-in low voltage protection that automatically shuts off the unit when voltage drops below 14.4V to prevent over-discharging.