Protege SI4 15L 18V Backpack Garden Weed Sprayer

Product Overview

The Protege SI4 is a practical backpack sprayer for gardeners, property owners, and anyone who wants a more convenient way to handle spraying jobs around the yard, garden, or small farm. With its cordless 18V setup and generous 15-litre tank, it is built to make weed control, fertilising, and general spraying work easier and less tiring than a hand-pump sprayer.

Why This Sprayer Stands Out

What makes the SI4 especially appealing is the way it combines portability with useful working capacity. The backpack design keeps the weight balanced on your back, while the battery-powered operation means you can keep spraying without constantly stopping to pump by hand.

15L Tank for Practical Coverage

A 15-litre tank gives this sprayer the kind of capacity that suits regular garden and property maintenance. It is large enough to cover a useful area before refilling, which helps make longer spraying sessions more efficient.

18V Battery-Powered Convenience

Powered by an 18V lithium-ion battery, the SI4 is designed for simple cordless use. That makes it easy to move around garden beds, lawn edges, paths, and larger outdoor areas without being restricted by power cords or manual pump pressure.

Comfortable Backpack Design

The padded adjustable shoulder straps are one of the most practical features of this model. They help spread the load more comfortably, which matters when you are carrying a full tank and working your way around a larger yard.

Spray Distance Over 8 Metres

With a listed spray distance of more than 8 metres, this unit offers useful reach for a wide range of outdoor spraying jobs. That can make it easier to cover broader areas and reach more awkward spots without constantly repositioning yourself.

Three Adjustable Nozzle Options

The included nozzle selection gives the SI4 more flexibility than a basic one-pattern sprayer. With a 3-way nozzle, metal adjustable nozzle, and fan nozzle in the box, you can adapt the spray pattern to suit different tasks and coverage needs.

Detachable Trigger and Lance

The detachable spray trigger and lance add to the overall practicality of the setup. They make the sprayer easier to use, easier to handle, and simpler to pack away when the job is done.

UV-Stabilised Tank Construction

The tank is made from UV-stabilised polyethylene, which is a useful feature for outdoor equipment that may spend plenty of time in the sun. It adds to the sprayer’s practical, garden-ready feel.

Easy-Fill Cap with Integrated Handle

The listing highlights an easy-to-fill tank with an integrated handle on the cap. This is the kind of small detail that can make setup and refilling more straightforward when you are working through regular spraying jobs.

Great for Garden and Property Maintenance

This sprayer suits a wide mix of outdoor uses, from weed control and fertiliser application through to general watering and spraying jobs around the garden. It is a handy option if you want something more efficient than a small hand sprayer but still easy to manage.

Key Specifications

• Brand: Protege
• Model: SI4
• SKU: PMPSPRPROASI4
• Product type: Weed Sprayer
• Power type: Battery
• Battery type: Lithium Ion
• Battery voltage: 18V
• Battery capacity: 2.2Ah
• Pump type: Diaphragm
• Tank capacity: 15L
• Tank material: UV Stabilised Polyethylene
• Current: 1.5A
• Flow rate: 1.8 L/min
• Spray distance: >8m
• Hose length: 1.25m

Highlights at a Glance

• 15L backpack tank for practical garden coverage
• 18V lithium-ion battery-powered convenience
• UV stabilised tank construction
• Padded adjustable shoulder straps
• Durable 1.25 metre hose
• 3 adjustable spraying nozzles
• Detachable spray trigger and lance
• Easy-to-fill tank with integrated handle on cap
• Useful for weed spraying, fertilising, and general garden maintenance

What’s in the Box

• 1 x Protege SI4 15L Backpack Sprayer
• 1 x Battery Charger
• 1 x 3 Way Nozzle
• 1 x Metal Adjustable Nozzle
• 1 x Lance
• 1 x Spray Trigger
• 1 x Fan Nozzle
• Note: User manual is accessible online.

Size and Weight

• Product dimensions (W x D x H): 36 x 20 x 52cm
• Product weight: 3.7kg
• Lance length: 83cm
• Carton dimensions (L x W x H): 35 x 23 x 57cm
• Carton weight: 5kg

Who It Suits

This sprayer is a strong fit for home gardeners, hobby farmers, and property owners who want a more comfortable and efficient way to spray larger areas. It makes especially good sense for buyers who prefer cordless convenience over manual pumping.

Final Thoughts

The Protege SI4 comes across as a very practical backpack sprayer for everyday outdoor spraying work. With its 15L tank, 18V battery setup, comfortable shoulder straps, useful nozzle selection, and long spray reach, it is a handy option for keeping weeds, fertilising jobs, and general garden spraying under control with less effort.

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