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Cordless 18V Garden Sprayer for Effortless Battery-Powered Pressure Spraying
- Battery-powered spraying – Electrically pressurised operation eliminates the need for repeated manual pumping.
- Cordless operation – Convenient portable spraying without requiring a mains electricity connection.
- 18V Battery Power – Part of Kärcher's interchangeable 18 Volt Battery Power platform.
- Battery sharing – Compatible batteries can be shared with other Kärcher 18V machines.
- Flexible purchase options – Choose the pressure sprayer alone or add a compatible Kärcher 18V battery and charger when ordering.
- Garden spraying – Designed for controlled application of suitable liquids around the garden.
Why should I buy a Karcher PSU 4-18 Battery Power Pressure Sprayer?
The PSU 4-18 provides a convenient battery-powered alternative to a conventional manually pressurised garden sprayer. Electric pressurisation reduces the need for repeated pumping while cordless operation provides the freedom to move around the garden. Existing Kärcher 18V users can use their compatible battery and charger, while customers new to the platform can add a suitable battery and charger when ordering.
Typical Applications
- Spraying suitable garden treatments
- Applying compatible liquids to plants and shrubs
- Routine plant and garden care
- Spraying larger garden areas without repeated manual pumping
- Portable spraying away from mains electricity
- Starting or expanding a Kärcher 18V Battery Power collection
Product Details
The Karcher PSU 4-18 Battery Power Pressure Sprayer (1.445-300.0) is a cordless garden sprayer designed for convenient application of suitable liquids around the garden. Battery-powered pressurisation removes the need for repeated manual pumping, providing a practical solution for spraying plants, shrubs and other garden areas.
The PSU 4-18 combines cordless operation with a portable pressure spraying system, allowing suitable garden treatments and other compatible liquids to be applied with greater convenience. Its battery-powered design maintains the spraying pressure electrically, reducing the effort associated with conventional manually pressurised garden sprayers.
As part of the Kärcher 18 Volt Battery Power platform, the PSU 4-18 uses the same interchangeable battery system as a growing range of compatible Kärcher garden tools and cleaning machines. Compatible 18V batteries can therefore be shared between machines, allowing customers to build a collection of cordless Kärcher equipment around a common battery platform.
Kärcher supplies the PSU 4-18 as a machine-only product without a battery or charger. Customers who already own compatible Kärcher 18V Battery Power equipment can purchase the pressure sprayer on its own, while a compatible battery and charger can also be added when ordering for customers who require them.
Accessories Included
- Measuring Cup (integrated in tank lid) – convenient for accurate dosing of pesticides and fertilisers
- Shoulder Strap – improves comfort and weight support during longer spraying periods
- Telescopic Spray Lance (450mm – 750mm) – enables ergonomic extended reach and precision application
- No battery or charger supplied – this is a machine-only package, a battery and charger must be purchased for use or use an existing battery and charger from a compatible Karcher 18V Battery Power range product if already owned
| Pump Specifications | |
| Spray Pressure | 3 Bar |
| Spray Rate | 30 Litres / Hour max. |
| Capacities | |
| Solution Tank Capacity | 4 Litre |
| Power Specifications | |
| Battery Voltage | 18 V |
| Battery Capacity | 2.5 Ah / 5.0 Ah |
| Battery Run Time | max. 400 (2.5 Ah) / max. 800 (5.0 Ah) |
| Powered By | Karcher Battery Power 18V |



