4 gal Battery Backpack Sprayer - Field King 190515 Professional

In this review of the Field King 190515 Professionals Battery Powered Backpack Sprayer the bottom line is simple: this is a practical, time-saving sprayer for pros who need a cordless solution that keeps working without hand pumping. It is best for landscapers, pest control technicians, and homeowners tackling large properties who value long runtime and consistent pressure. The single biggest reason to buy is the battery power combined with a pre-set 40 psi output that delivers steady, professional spray performance for up to 4 hours or roughly 50 gallons per charge.

Key Features

• Battery runtime: The 18 volt Lithium-Ion 2.1 Ah battery delivers up to 4 hours of continuous spraying on a single charge, reducing interruptions on larger jobs.
• Consistent pressure: Pre-set 40 psi output and 0.2 GPM with the included 8002 nozzle give predictable spray coverage for typical landscape applications.
• Durable build: Powder-coated steel frame resists corrosion and chemical exposure, extending service life in demanding environments.
• User comfort: Fully padded back harness and ergonomic backpack design make extended wearing comfortable for day-long work.
• Clog prevention: Triple filtration protects the pump and reduces nozzle blockages when using water soluble solutions.
• Versatile nozzle set: Four nozzles included plus compatibility with tee jet nozzles let users switch between flat fan, low and high volume, and foaming patterns.

Who It's For

The Field King 190515 is aimed at professionals and serious homeowners who need a reliable cordless sprayer for herbicides, insecticides, fungicides and water-based fertilizers. Its long runtime and 24 ft vertical reach are useful for tree lines, tall shrubs and large turf areas where repeated pumping would slow progress.

Users who must apply wettable powders or very abrasive suspensions should look elsewhere, as the unit is not designed for wettable powders. Also, those who require extremely high pressure beyond the pre-set 40 psi should consider a different model with adjustable high-pressure capability.

Pros & Cons

Pros

• Battery power eliminates the need to pump while spraying, saving time and effort.
• Long spray duration and high per-charge volume make it efficient for large jobs.
• Comfortable padded harness and powder-coated frame suit full-day professional use.
• Triple filtration and Viton seals enhance chemical resistance and pump longevity.

Cons

• Not intended for wettable powders, limiting use with some formulations.
• Some users report occasional leakage, so check fittings and seals before heavy use.

Specifications

Our Verdict

The Field King 190515 is a strong choice for professionals and property owners who need a cordless sprayer that balances runtime, comfort and durability. Its consistent 40 psi output and included nozzle kit deliver dependable coverage, and the powder-coated frame and Viton seals provide chemical resistance. It offers good value for anyone who does frequent liquid applications but is not suitable for wettable powders or users needing higher pressure.

Frequently Asked Questions

How long will the battery last on a full charge?
The included 18V 2.1 Ah battery provides up to about 4 hours of spray time or roughly 50 gallons depending on nozzle and spray settings.

Can it handle wettable powders?
No, this sprayer is not designed for wettable powders and should only be used with liquids and water soluble solutions.

Are replacement nozzles available?
Yes, the sprayer accepts the included nozzles and is compatible with tee jet nozzles for additional spray patterns.