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Availability:
In Stock.
Arrives
Wednesday, Sep 2
Style: Battery Powered
Features
- No pumping required while using with liquids and water soluble solutions
- Up to 4 hours of spray duration on a single charge or 50 gallons of liquid (with 8002 nozzle)
- 18 volt Lithium-Ion 2.1 Ah Battery charges in 3.5 hours (charger included). interchangeable Battery system.
- Pre-set spraying pressure at 40 psi, 0.2 GPM, for typical landscape applications (with 8002 nozzle)
- Powder-coated Steel frame for durability and chemical resistance
- Fully padded back harness for all day spraying comfort
- Triple filtration system prevents clogging during use and enables pump longevity
- Premium, lockable shutoff; 21 inch poly wand; and the highest quality Viton seals for chemical resistance
- 4 nozzles included: brass adjustable, low volume flat fan, high volume flat fan, and foaming nozzle. Also accepts tee jet nozzles.
- Not designed for use with wettable powders.
Description
The Field King pro Max 190515 lithium-ion battery powered 4 gallon backpack sprayer consists of an ergonomic design modeled after the existing Field King 190328 no-leak pump backpack sprayer. With integrated battery storage, this design ensures the equipment is protected from the elements & liquids during filling & spraying. With the 24 foot vertical spray height, this easily cleanable & maintainable sprayer is ideal for professionals applying herbicides, insecticides, fungicides, fertilizers & other water-based chemicals in hard to reach areas. With 4 hours of spray time andup to 50 gallon sprayer volumeper charge, this sprayer is perfect for Weed prevention, Weed remediation, & pest control.
Brand: Field King
Tank Volume: 4 Gallons
Color: White
Material: Alloy Steel
Item Weight: 14.2 Pounds
Brand Name: Field King
Model Name: Professionals
Model Number: 190515
Manufacturer Warranty Description: 1 Year
UPC: 841688005549 841688005334
Global Trade Identification Number: 34
Manufacturer Part Number: 190515
Item Type Name: Battery Powered Backpack Sprayer
Manufacturer: The Fountainhead Group, Inc.
Tank Volume: 4 Gallons
Item Weight: 14.2 Pounds
Item Dimensions W x H: 15"W x 22.5"H
Hose Length: 50 Inches
Color: White
Style Name: Battery Powered
Power Source: Battery Powered
Maximum Pressure: 40 Pound per Square Inch
Material Type: Alloy Steel
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Sep 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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Battery Powered
I've been using my sprayer for about 3 weeks now. Just yesterday and today I sprayed 6 acres of avocado orchard where weeds were growing between the rows and between trees. I pretty much worked non-stop each day for 6 hours and the battery never showed any signs of weakening. I do believe they are correct when they say it'll spray 50- gallons on one charge. It doesn't leak, it's very quiet and it's comfortable with it's wide straps and harness. Here's the thing: I am not spraying continuously, I'm spraying individual weeds but at times I'll spray for upwards of 5-6 seconds when I encounter a cluster of weeds. The sprayer kept-up just fine but after 4-5 seconds you will notice a reduction in pressure and it starts 'falling-off', after 8-10 seconds you're at half-power. Of course, this will vary depending which spray head you use. Now let me tell you about my awesome modification! Since you no longer have to pump the sprayer, I decided to convert mine into a dual-sprayer unit! I cut the hose about 6 inches coming out of the tank and then went to Home Depot and bought a plastic/nylon Tee fitting. I then got some fuel-injection clamps (not band clamps), these clamps are smooth and let you really cinch down on the hose. I took another hose and sprayer and now I have a sprayer in each hand! This proved to be incredibly more production and faster working through the orchard. You can also bring the sprayers together to double-saturate a weed as well. Did the sprayer keep-up with having TWO sprayers going? Yes, it did but if both sprayers were going for more then 5-6 seconds I did notice the pressure reduced and I wasn't get as much a mist/spray but instead more streaming. Still, double-sprayer is the way to go, I'm surprised they don't offer this already.
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Reviewed in the United States on May 22, 2020 by Steve R
Style: Battery Powered
So far, great. This unit is an improvement over the Petra 4-gallon sprayer that only gave me problems. I have used this unit to spray 8 tanks of herbicide so it’s new. What I find so well designed with this sprayer is that it shuts off the pump when the spraying stops. Another design that appeals to me is the built-in bottom stand that helps in stability when I have the unit on my zero turn mower between my legs. It doesn’t tip over. I also ordered and received the 4.2amp battery so now I can spray for a long time. I need the long spray time because I live on a large acreage.
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Reviewed in the United States on April 10, 2026 by Tony Anders
Style: Battery Powered
The TLDR is that this is an upgrade from my old 2 gallon hand pump carry by my side sprayer I used to use. Definitely makes spraying weeds easier on my larger lot. The good: Holds 2x more than the typical carry next to you type sprayers. Battery operated!!! No more pumping! Battery appears to last a long time. I have used it for about 10 refills and the battery hasn't been charged yet and still works. The wand has a locking mechanism for continuous spraying Seems sturdily built The bad: You can't quite fill it up to the full 4 gallon mark or it overflows in the real world It weighs a lot once it's filled up up. The review: I have used this for about 40 gallons worth of spraying RoundUp Pro Concentrate and I have not had any issues with performance of this. It does get pretty heavy when you have it full of whatever you are spraying so I would recommend that you fill it up while it is sitting on something that is a little elevated off the ground. I choose to do this on the edge of my retaining wall that sits about 3ft off the ground. this allows me to not have to bend down as far to pick it up and put it on. It has a chest clip though that really does help take the load off once you have your arms through the straps. As for the actual spray performance, I have only used the fanning spray nozzle (red tip) and it covers what I need it to just fine. Doesn't get clogged at all. Be sure to read the directions and do a good plain water rinse on it after you get done using your chemicals in it. The battery makes the pump run once you squeeze the sprayer handle and it's pretty quiet. Just sort of purrs on your back and then quits once it gets to pressure or you release the handle. If you pay close attention you can start to hear the pump trying a little harder when you start to get low on your chemical and then about 30 seconds later your nozzle starts the doing the sputter to indicate you are pretty much on "E". it did take a time or two for me to remember to turn the switch to the "On" position before I loaded it on my back but once you get used to it you can sort of feel around for the switch on the left bottom side. All-in-all this is a great upgrade from the bottle sprayers I used to use. Now that I have about 3/4 of an acre of just weed areas alone on my property this really saves me time and energy. I always feel accomplished and like I made a big dent in the weeding work when I get done using this for the day. I would recommend this to anyone that has a semi-large walking area to maintain. Anything over an acre of weeds though would probably warrant a real pull-behind sprayer.
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Reviewed in the United States on March 25, 2019 by thesphynx
Style: Battery Powered
This battery-operated backpack sprayer is easy to use and makes large spraying jobs much more efficient. The adjustable spray settings work well for different applications, and the battery life holds up during regular use. It reduces the strain of manual pumping significantly. It is a bit heavier when fully loaded, but overall it’s a strong and practical tool for lawn and garden care.
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Reviewed in the United States on May 12, 2026 by Marie Phillips
Style: Battery Powered
Extremely disappointed. I bought last year and now using it for the first time. Battery is charged, it comes on with the low "hum", but never builds up any pressure. I have not yet attempted to take it all apart to troubleshoot it yet, but I feel like I should not have to that since its never been used. So now i will be pulling this piece of garbage apart to see what the heck is going on with it.
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Reviewed in the United States on May 28, 2026 by ChrisD
Style: Battery Powered
I am a pest technician, and I used to use a pump backpack sprayer. But I get sick and tired of using that so I started looking around for a electric backpack sprayer, and found this. I love it. I’ve been using it for about a month and a half and it’s easily one of the best things to do my job with. The backpack is in constant daily use and I do like that the battery will last at least a week before you need to recharge it, because if I had to charge that every single day it would get rather annoying. All in all this is a great backpack sprayer. This is a little bit on the costly side but you’re really not gonna get anything better then this. it even has a back padding which is easily the most luxurious thing about this backpack sprayer. I do recommend picking this up. P.S… I see a lot of comments about how it crapped out or how doesn’t spray well after a few uses, all you gotta do is make sure it’s clean like any other backpack sprayer, if you don’t clean it out it will gunk up and not spray well or at all, so please make sure it’s clean before you write comments about this product
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Reviewed in the United States on July 26, 2021 by Giovanni Arroyo
Style: Battery Powered
Had it for about 3-4 years and its been great to use! No issues so far. Great use for spraying pre-emergent. Fill and go. Pumps great to pressurize the sprayer for continuous use. Approximately 3000 sq ft of lawn used on single use.
Reviewed in the United States on June 13, 2026 by IL CHO
Style: Battery Powered
So I decided to do my own weed control in my yard and was told a battery operated sprayer was the way to go. I read a lot of reviews and decided on this Field King 4 gallon sprayer. So to start with the pattern is great and CONSTANT. I have used the pump up kind before and the stream is always changing by how much you have it pumped up wit the handle. This sprayer has a constant pressure so you the stream is constant. Makes it much easier to get an even spray. The wand is plastic but is very heavy duty. The adjustable brass nozzle will go from a straight stream with a lot of reach to a fine cone spray. has a filter for when you load it to keep trash from getting in it. Have sprayed my entire yard 4 times now and have never had to clean out the nozzle. It has a removable battery that you put on the charging cable. i let mine charge over night and I have sprayed five or six tanks and still never run the battery down. The straps are wide and padded so it is pretty comfortable. It is kind of heavy, but it's going to be with 4 gallons of water in it. Another think I like about it is you can back spray into it. I use a powdered pre-emergent so it has to be mixed up well. I just add water and the powder, then stick the nozzle in it and let in run for a few minutes. It will still spray to mix this way with the lid off. My dad was looking for one and I told him about mine. He bought the same one and loves it too.
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Reviewed in the United States on June 19, 2024 by Doublereno