Field King battery backpack sprayer 190515 Pro Max, 4 gal — 4-hour runtime, 24 ft reach

The Field King 190515 Pro Max is a 4-gallon, lithium-ion battery backpack sprayer that delivers up to four hours or 50 gallons of hands-free spraying with a 24-foot vertical reach for professional landscape and pest-control work.

Designed as an ergonomic, battery-powered evolution of Field King's proven no-leak pump sprayers, the 190515 integrates the battery into the frame to keep electronics safe during filling and use. It combines a powder-coated steel frame, padded harness, and a triple-filtration system to resist chemicals, reduce clogs, and extend the unit's service life. The sprayer is tuned for water-based landscape chemicals and is optimized for efficiency and operator comfort on large or hard-to-reach jobs.

How long can I spray on a single charge and how much can it cover?

On a full 18V, 2.1 Ah lithium-ion battery charge (charger included), the Pro Max runs about four hours and can spray up to roughly 50 gallons when fitted with the 8002 nozzle. That runtime and volume make it suitable for multi-zone yards, commercial beds, or extended pest-control routes without frequent recharges.

• Up to 4 hours continuous spray per charge
• Approximately 50 gallons per charge with 8002 nozzle
• Battery charges in about 3.5 hours and is interchangeable

What spray performance and controls does it offer for landscape work?

The unit operates at a preset 40 psi with a flow near 0.2 GPM using the included 8002-style nozzle, giving consistent coverage for common herbicides, insecticides, fungicides, and fertilizers. It ships with four nozzle types and accepts standard tee-jet tips so you can match spray patterns and volumes to each task.

• Preset 40 psi and 0.2 GPM for even, repeatable application
• Includes brass adjustable, low/high-volume flat fans, and foaming nozzle
• Compatible with tee-jet nozzles for added flexibility

How durable and serviceable is the sprayer in the field?

Field King built the 190515 on a powder-coated steel frame with premium Viton seals and a lockable shutoff for chemical resistance and longevity. The triple-filtration system reduces clogs and pump wear, and the design allows easy cleaning and maintenance to keep the unit operating season after season.

• Powder-coated steel frame resists corrosion and chemicals
• Triple filtration to minimize nozzle and pump blockages
• Viton seals, lockable shutoff, and serviceable wand components

Is it comfortable and safe to use all day?

The backpack features a fully padded harness that spreads weight and improves comfort for extended use, while integrated battery storage protects the pack against spills during filling. Ergonomic wand length and secure fittings reduce operator fatigue and help maintain steady, accurate application.

• Fully padded back harness for long-duration comfort
• Integrated battery compartment protects electronics from liquids
• 21-inch poly wand for reach and reduced operator strain

Who is this for: The Field King 190515 Pro Max is aimed at landscaping professionals, pest-control technicians, groundskeepers, and serious property owners who need a reliable, chemical-resistant, battery-powered sprayer for medium-to-large areas and hard-to-reach spots. It is best suited for water-soluble liquids—herbicides, insecticides, fungicides, and fertilizers—and not intended for wettable powders. If you want consistent pressure, fewer stops to pump, and a durable, serviceable tool that increases daily productivity, this sprayer is built for that purpose.