--- product_id: 426757586 title: "Backpack Sprayer 4 Gallon, Self-Cleaning Battery Powered Backpack Sprayer for Weeding, Cleaning, No Gear Limit, Variable Pressure" brand: "alientabi" price: "£311.95" currency: GBP in_stock: true reviews_count: 4 category: "Alientabi" url: https://www.desertcart.co.uk/products/426757586-backpack-sprayer-4-gallon-self-cleaning-battery-powered-backpack-sprayer store_origin: GB region: United Kingdom --- # 18V/4.9Ah battery power Variable pressure 8-116 PSI 4 Gallon tank capacity Backpack Sprayer 4 Gallon, Self-Cleaning Battery Powered Backpack Sprayer for Weeding, Cleaning, No Gear Limit, Variable Pressure **Brand:** alientabi **Price:** £311.95 **Availability:** ✅ In Stock ## Summary > 🌿 Spray Smarter, Not Harder — The Future of Lawn Care is Here! ## Quick Answers - **What is this?** Backpack Sprayer 4 Gallon, Self-Cleaning Battery Powered Backpack Sprayer for Weeding, Cleaning, No Gear Limit, Variable Pressure by alientabi - **How much does it cost?** £311.95 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/426757586-backpack-sprayer-4-gallon-self-cleaning-battery-powered-backpack-sprayer) ## Best For - alientabi enthusiasts ## Why This Product - Trusted alientabi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Multi-Tasking Marvel:** Beyond spraying—rinse, soak, or refill with ease using the innovative one-key operation for diverse outdoor tasks. - • **Precision Power Control:** Effortlessly switch from mist to stream with a smooth variable pressure dial (8-116 PSI) for targeted spraying. - • **Long-Lasting Battery Life:** Spray over 58 gallons and cover 33+ feet continuously for 4+ hours on a single charge—work uninterrupted. - • **Ergonomic & Durable Design:** Comfort-fit backpack with chest strap and corrosion-resistant polypropylene build ensures all-day use without fatigue. - • **Revolutionary Self-Cleaning:** One-touch automatic hose and pump cleaning prevents buildup and corrosion—spray smarter, not harder. ## Overview The ALIENTABI 4 Gallon Backpack Sprayer combines cutting-edge variable pressure control (8-116 PSI) with exclusive self-cleaning technology, powered by a robust 18V/4.9Ah battery delivering over 4 hours of continuous use. Designed for professional-grade precision and comfort, it sprays up to 33 feet and handles multiple liquids effortlessly, making it the ultimate tool for efficient, hassle-free lawn, garden, and commercial maintenance. ## Description desertcart.com : ALIENTABI Backpack Sprayer 4 Gallon, Self-Cleaning Battery Powered Backpack Sprayer for Weeding, Cleaning, No Gear Limit, Variable Pressure : Patio, Lawn & Garden Review: Early Impressions; a Great Sprayer - I did a lot of research when replacing my old hand pump backpack sprayer with a battery powered one. One of the features that helped me decide on this sprayer was the self-cleaning feature. I have a large pond and need to spray algicides in order to keep the surface clean. That leads me to the second reason I chose this sprayer. It sprays at least 30 feet horizontally depending on wind and chemicals being sprayed. When I received the sprayer, I was immediately impressed with the manner in which it was packaged. After some minor assembly and charging the battery, it was ready for use. I ran a tank of plain water in it first to see the different spray patterns of the three included tips. After that, I mixed up some algicide and put the sprayer to use. I was a little concerned at first that the straps did not include straps across the stomach. After properly adjusting the straps, I realized that a strap across the stomach was not necessary. It does have a strap with buckle across the chest. The unit is very comfortable on the back and the on/off/variable pressure dial is easy to reach. When I finished spraying, I rinsed the tank since I used the entire mixture minus just a very small amount in the bottom of the tank. I poured a bucket of water and attached the self-cleaning pickup hose. I flipped the diverter valve to clean and pumped plain water through the pump, hose, and nozzle. It doesn't get any easier than this. The battery has a lot of charge left in it so there is no need to charge it after each use. Given all of the choices out there, I am really glad I picked this one. Absolutely no leaks, a strong performer, and not at all uncomfortable on the back. This is a solid piece of equipment. I am in high hopes it gives me years of trouble-free service. Review: Great sprayer - This sprayer works great. The rechargeable battery lasts a long time and is very powerful, making it ideal if you need to spray a long distance. Just be aware that even on the lowest setting, which I use all the time, you will use more product than you do with the hand pump sprayers. Just set your nozzle so you don't have to swing it back and forth to cover your area and walk fast. ## Features - High-Pressure Precision Spraying: Experience total control with ALIENTABI’s variable pressure system (8–116 PSI). No gear limit—just smooth, precise adjustment! Turn the knob to customize your spray pattern, easy switching between mist and stream modes. Ideal for lawns, gardens, and commercial use - Exclusive Self-Cleaning Technology: The first battery-powered backpack sprayer featuring exclusive self-cleaning technology. With one simple press, it automatically cleans the hose and pump—preventing chemical buildup, minimizing corrosion, reducing waste, and extending the product’s service life - Innovative & Multi-Functional Design: Designed for more than spraying! The self-cleaning function allows you to rinse, soak, or refill easily—ideal for scenarios like cleaning stagnant water, refilling fish tanks, or switching between different liquids. One-key operation makes every task quick and effortless. - High Efficient & Powerful Performance: Powered by an 18V/4.9Ah battery, this sprayer delivers 7× the efficiency of manual models. It can operate continuously for over 4 hours, spray 58+ gallons per charge, and reach a distance of over 33 feet—perfect for large areas and professional use. - Customer Oriented: ALIENTABI is a customer-centric brand. Before the sprayer is sent out, the factory will conduct a series of quality inspections on the machine, including a water leakage test, so some products will have residual water stains inside the box, which will not affect the use. If you receive the goods and think there is a problem, get back to us ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09QPY6TLL | | Batteries | 1 Lithium Polymer batteries required. | | Best Sellers Rank | #303,911 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,200 in Lawn & Garden Sprayers | | Brand | ALIENTABI | | Customer Reviews | 4.2 4.2 out of 5 stars (227) | | Hose Length | 33 Feet | | Item Weight | 16.3 pounds | | Item model number | Inventor 3 | | Manufacturer | ALIENTABI | | Material | Polypropylene (PP) | | Maximum Pressure | 116 Pound per Square Inch | | Model Name | Inventor 5.5 | | Power Source | Battery Powered | | Product Dimensions | 14"W x 23"H | | Style | Modern | | Tank Volume | 4 Gallons | ## Product Details - **Brand:** ALIENTABI - **Item Weight:** 16.3 Pounds - **Material:** Polypropylene (PP) - **Product Dimensions:** 14"W x 23"H - **Tank Volume:** 4 Gallons ## Images ![Backpack Sprayer 4 Gallon, Self-Cleaning Battery Powered Backpack Sprayer for Weeding, Cleaning, No Gear Limit, Variable Pressure - Image 1](https://m.media-amazon.com/images/I/71r0IpdVh3L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What does the self-cleaning mean?** A: Self-cleaning: Through a special loop, the hose, sprayer parts and spray wand can be cleaned by external clean water without contact with the chemicals in the water tank. It is especially suitable when you only spray half of the chemicals and plan to rest. You can keep the chemicals in the water tank, use self-cleaning to clean it up, and continue to use chemicals next time! **Q: Does the pump run continuously when switched on, or only when spraying?** A: Only when spraying. It shuts off when you release the trigger. If the tank runs empty, it will constantly run though so make sure to turn it off once the tank is empty. **Q: Can sprayer be used to water plants without damaging them?** A: This has an adjustable spray volume. It should work fine for watering plants. **Q: Where can u just buy extra battery for sprayer** A: You can order it from the company that makes it, but I can tell you the battery last a very long time. It can be used for several days for 3-5 hrs and want need to be charged. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Early Impressions; a Great Sprayer *by D***R on July 8, 2023* I did a lot of research when replacing my old hand pump backpack sprayer with a battery powered one. One of the features that helped me decide on this sprayer was the self-cleaning feature. I have a large pond and need to spray algicides in order to keep the surface clean. That leads me to the second reason I chose this sprayer. It sprays at least 30 feet horizontally depending on wind and chemicals being sprayed. When I received the sprayer, I was immediately impressed with the manner in which it was packaged. After some minor assembly and charging the battery, it was ready for use. I ran a tank of plain water in it first to see the different spray patterns of the three included tips. After that, I mixed up some algicide and put the sprayer to use. I was a little concerned at first that the straps did not include straps across the stomach. After properly adjusting the straps, I realized that a strap across the stomach was not necessary. It does have a strap with buckle across the chest. The unit is very comfortable on the back and the on/off/variable pressure dial is easy to reach. When I finished spraying, I rinsed the tank since I used the entire mixture minus just a very small amount in the bottom of the tank. I poured a bucket of water and attached the self-cleaning pickup hose. I flipped the diverter valve to clean and pumped plain water through the pump, hose, and nozzle. It doesn't get any easier than this. The battery has a lot of charge left in it so there is no need to charge it after each use. Given all of the choices out there, I am really glad I picked this one. Absolutely no leaks, a strong performer, and not at all uncomfortable on the back. This is a solid piece of equipment. I am in high hopes it gives me years of trouble-free service. ### ⭐⭐⭐⭐⭐ Great sprayer *by A***R on October 4, 2025* This sprayer works great. The rechargeable battery lasts a long time and is very powerful, making it ideal if you need to spray a long distance. Just be aware that even on the lowest setting, which I use all the time, you will use more product than you do with the hand pump sprayers. Just set your nozzle so you don't have to swing it back and forth to cover your area and walk fast. ### ⭐⭐⭐⭐ Unique features I haven't seen in other backpack sprayers. Some minor upgrades *by R***E on December 30, 2022* I have looked over a number of backback sprayers, and knew that I wanted a battery powered one so that it can spray more evenly. I have used pump style sprayers before and once the pressure gets lower I tend to overspray or underspray areas, so I knew a battery powered one would keep a constant stream (hopefully). This product has features that I haven't seen on any other battery powered backpack sprayers, such as the pressure washer style spray attachment which can use the same nozzles as pressure washers. Other backpack sprayers have weak plastic nozzles pointed at weird angles. The motor isn't loud and I can dial in the pressure I want which is also a unique and useful feature. I thought I would really like the rinse feature, but I will probably never use it only because it seems like it would be easier to attach a water hose to the tank at a lower pressure and then use the sprayer to cycle through the water coming from the hose to rinse it out. Though the rinse feature can also be used to transfer fluids and you may have to own it to know what I mean. The manual states this which is where I got that idea from. The description makes it sound like is has a super duper smartphone battery, when in fact its just a regular power tool battery, and a low voltage one at that. It is only 18.5 volts, and perhaps it has to be lower in order for the tank not to be emptied immediately at full power. They could probably greatly increase their sales and lower their price if they used the same batteries as the Black N Decker 20V power tools which probably all of us already own and sell it as (tool only). I read backpack sprayer reviews stating how heavy they are when filled with liquid, but I have no problem with it. I suppose all of those years carrying heavy books in my backpack and walking to school paid off. So if they ever release a newer version in the future, I would suggest that the sprayer hose can unscrew from both ends and use Black N Decker style batteries. I will use this to spray products on my large lawn that do not work with hose sprayers. I thought about getting a tow sprayer to use with my riding mower, but I don't have anywhere to put it so this smaller backpack can be placed on the shelf in my garage. UPDATE I have used this about four times already to spray weed killer on my lawn and it has worked perfectly. I like how its almost like a weaker version of a 120V pressure washer. The first time I filled it all the way up and didn't have any problem with the weight and the shoulder pads are very thick to absorb any discomfort. The next few times I used it, I didn't fill it all the way up as I didn't need as much and its a lot lighter then (obviously) for those who say it may be too heavy when full. ## Frequently Bought Together - ALIENTABI Battery Powered Backpack Sprayer 4 Gallon, Self-Cleaning Garden Sprayer, 4.9Ah Ultra-Long Power Supply Lithium Battery Sprayer for Weeding, Cleaning, No Gear Limit, Variable Pressure - Southern Ag Surfactant for Herbicides Non-Ionic, 16oz, 1 Pint - Round Up Pro Concentrate 50.2% Glyphosate 2.5 Gallon Jug Systemic Herbicide --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/426757586-backpack-sprayer-4-gallon-self-cleaning-battery-powered-backpack-sprayer](https://www.desertcart.co.uk/products/426757586-backpack-sprayer-4-gallon-self-cleaning-battery-powered-backpack-sprayer) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-17*