The Kärcher LMO 4-18 Dual battery lawn mower allows you to use cut grass instead of fertilizer, as it features a mulching function. Additional benefits:

• very powerful brushless motor with long service life;
• dual battery power 36 V (2 x 18 V);
• iPower intelligent engine control (automatic speed adjustment);
• low weight and compactness (cutting width up to 37 cm ) for comfortable maneuvering;
• 5-step cutting height adjustment ( 25–65 mm ), etc.

Karcher LMO 4-18 Dual battery lawn mower with a cutting width of 37 cm - ideal for lawns up to 450 m2.

Powered by two 18 V batteries and a brushless 36 V motor, the Karcher LMO 4-18 Dual battery lawn mower is the ideal solution for lawns up to 450 m2.

The low weight makes the mower particularly agile and manoeuvrable. It can be pushed effortlessly even on uneven terrain and around obstacles.

The working width is 37 cm, and the cutting height can be easily adjusted in five stages between 25 and 65 mm.

Thanks to the intelligent iPower motor control, the speed is automatically adjusted to the condition of the grass while mowing.

The lawn combs automatically capture grass, even if it grows close to the edges.

With the 2-in-1 mowing system, clippings are distributed evenly across the lawn through the mulch plug to act as fertilizer, or collected in the large 40-litre grass catcher – for uninterrupted mowing for longer.

The height of the guide can be adjusted for a comfortable working position.

When the frame is folded, it takes up less space when stored.

It has a large, sturdy handle for carrying it up stairs and steps.

Compatible with all replaceable batteries on the 18 V Kärcher Battery Power battery platform.

Features and benefits

18 V + 18 V = 36 V of power:
• Powerful 36 V motor powered by two 18 V li-ion batteries.

Powerful brushless motor:
• For longer operating time and longer device life.

iPower:
• Extra performance and optimized battery runtime. Thanks to intelligent motor control, the speed is automatically adjusted to the condition of the grass while mowing.

2-in-1 mowing system:
• The cut grass is efficiently collected in the grass catcher during mowing.
• Mulching function: With the mulching wedge, the cut grass is distributed over the lawn as a natural fertilizer.
• Sharp steel blade for precise mowing results without tearing the grass blades.

Efficient filling of the grass catcher:
• Thanks to the optimized airflow, the grass catcher is filled to 95%. This means fewer blockages during work.

Easy cutting height adjustment:
• With a single movement, you can easily adjust the cutting height to one of five levels, ranging from 25 mm to 65 mm.

Mowing all the way to the edge of the lawn:
• The grass rake automatically captures even the grass right at the edge of the lawn.

Space-saving design:
• The textile collection bag can be folded to a very small size and stored on the lawnmower in a space-saving manner.
• Foldable guide handle allows for storage in a small space.
• Built-in carrying handle
• Built-in carrying handle allows for easy transport.

Ergonomic handling concept:
• The guide handle can be adjusted to your body height – to ensure an upright posture while working.
• Foam handle provides a secure hold and a comfortable feel.

Technical data:
• Motor voltage (V): 36
• Device: battery-powered
• Battery platform: Battery platform 18 V
• Cutting width (cm): 37
• Cutting height (mm): 25 - 65
• Cutting height adjustment: 5-fold
• Grass catcher capacity (l): 40
• Drive: Brushless motor
• Number of revolutions (rpm): 3500
• Voltage (V): 18
• Number of batteries required (Piece(s)): 2
• Capacity with full battery * (m2): max. 225 (2.5 Ah) / max. 450 (5.0 Ah)
• Operating time with full battery (min): max. 20 (2.5 Ah) / max. 40 (5.0 Ah)
• Color: Yellow
• Weight without accessories (Kg): 14,171
• Dimensions (L x W x H) (mm): 1222 x 437 x 1002

Scope of delivery:
• Option: Batteries and charger not included
• Mulching kit
• Grass collection basket

Equipment:
• Blade
• Height-adjustable guide handle
• Built-in carrying handle
• Charge level indicator

Same summary

The Kärcher LMO 4-18 Dual battery lawn mower is particularly suitable for medium-sized gardens, as the 38 cm cutting width allows for quick passage, while the mower is also agile enough for slightly more complex lawns. Due to the capacity of the basket of up to 40 liters, emptying is less frequent when mowing more frequently, but it should be noted that the product does not come with a battery - so it is mainly suitable for users who already have the Kärcher battery system or are already familiar with its advantages. If you are looking for a solution for a large area and long-term mowing without stopping, it makes sense to plan for additional batteries. A special feature of the model is the possibility of using two batteries, which brings more flexibility and a longer period of work in one piece.

Recommendation source: Enaa guides and team experience.

User view

This type of lawnmower is most commonly used by homeowners with a garden who want a simple and quiet solution for mowing small to medium-sized lawns, especially in environments where maneuverability is important due to flower beds or paths. It is also popular with urban users who have lawns with many edges and need a machine that can be quickly stored in a small garden shed or garage.

Users appreciate the diverse ecosystem of Kärcher products, as they can easily change batteries and upgrade their tools to meet their needs in all seasons within one platform.

Why buy at Enaa

When shopping at Enaa, you can be sure that you have a quick overview of the latest battery lawn mower models, follow expertly set filters and quickly find versions according to your own criteria. In addition to a wide range, we also enable easy comparison of models with similar features, making it easier to choose for your garden.

Answers to frequently asked questions

Can I use any Kärcher battery with the LMO 4-18 Dual?

The mower supports Kärcher 18-volt batteries from their standardized platform. It is recommended to use original batteries with sufficient capacity for longer mowing.

What does it mean that the product does not come with a battery?

This means that you will need at least one compatible Kärcher battery to operate the lawnmower, which you can purchase separately or already use with other devices from this brand.

What surface is this mower best suited for?

The Kärcher LMO 4-18 Dual is best suited for small to medium-sized gardens, where the cutting width of up to 40 cm provides the optimal balance between working speed and maneuverability of the device.

Is the basket large enough so that it doesn't need to be emptied frequently?

The 40-liter grass catcher capacity is suitable for average lawns; if you mow frequently or have a larger lawn, you will still need to empty the grass catcher several times during one job.

Is the mower also suitable for mulching without collecting grass?

The mower allows you to mow without collecting the grass, which can be especially convenient if you want to reduce the amount of waste and the time spent emptying the grass catcher.

Description updated: April 2026