Lawnmaster L12 Robot Lawn Mower - Up to 800m2


£499.99 £599.99 L12-01

The LawnMaster robot lawn mower for larger lawns. Designed to cut lawns up to 800m2 at a height of 20mm to 60mm, this compact mower drops its clippings back onto the surface of the grass for a naturally fertilised, healthier lawn. Includes charging station, 10m power cable supply, 180m boundary wire and 300 pegs. Model no. L12-01.

See also: LawnMaster L10 Robotic Lawnmower - up to 400m2


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Combined Shape Specification

delivery-icon Free Delivery - Order before 12pm for same day dispatch

With a larger battery and longer boundary wire than the L10, the L12 takes care of lawns up to 800m2 giving you the freedom to relax or get other things done. The L12 independently mows for up to ten hours a day, leaving a neat finish with minimal effort. When the battery runs low, the mower returns to its docking station to recharge. The L12 cuts grass little and often in a random pattern, returning tiny clippings to the surface, naturally fertilising your grass and creating a lush looking, well-manicured lawn. 3 pivoting blades can be adjusted to cut the grass any height from 20mm to 60mm by turning a simple dial. For safety and security, the mower locks with a PIN code and 'bump and lift' sensors ensure that the blade stops if the mower is lifted or bumps into obstacles on the lawn. Navigates slopes of up to 35% (19º) inside the boundary area, and up to 17% (10º) at the boundary wire. IPX5 rated, the L12 can be easily cleaned with a low pressure garden hose. Once installed, the L12 requires minimal interaction. Installation and programming is straightforward, with supporting quick start guide and step-by-step video found on our LawnMaster Support page. The mower includes a built-in USB port for any firmware updates. Includes charging station, power supply, 180m boundary wire and 300 pegs. L12-01

Previous price charged 4/12/23 to 19/02/24.

Free delivery and same day dispatch

2 YEAR GUARANTEE | Free Next Working Day Delivery


LawnMaster Robot Mower L12 redocking onto charging station

Auto charging

The mower will mow the lawn and return to the charging station when the battery is low.

Person fixing robot mower boundary wire with pegs to lawn

Easy Set-Up

Easy to set up with complete step-by-step instructions provided. Simply mark out the robot mower's cutting area, which can be up to 800m², with the boundary wire and pegs that are supplied.

Person using keypad on robot mower to programme LawnMaster L12 robotic lawnmower

Easy to Operate

Simple keypad to programme the mower to operate 4, 6, 8 or 10 hrs a day, mowing on alternate days, performing perimeter cut mode, and sending the mower back to the charging station when needed. Follow our simple operating video on our Product Support page.

Rain drops on LawnMaster L12 robot mower sensors, sending it back to its charging station

Rain sensor

Rain sensor detects wet weather and sends the mower back to the base station to wait for better weather. Avoiding any potential damage to the lawn.

view of underside of LawnMaster L12 robot mower to show 3 pivoting blades

3 pivoting blades

3 sharp blades precisely cut the tips off the grass, giving a neat finish to the lawn. The grass clippings are returned to the lawn acting as a natural fertiliser.

LawnMaster Robot Mower L12 cutting slope of 35% (19 degrees)

Navigates Slopes up to 35% (19º) Max

Navigates slopes of up to 35% (19º) inside boundary area. Navigates slopes of up to 17% (10º) at boundary wire.

technical details

Model Number


Power Supply


Cord Length


Battery Voltage


Battery Energy


Battery Capacity


Cutting Width




Cut Height Settings (mm)


Battery Charging Time

100 mins

Continuous Run Time

120 mins


8.2kg with battery

Recommended Cutting Area


Cutting Duration

4, 6, 8 & 10 hours

Cutting Pattern


IPX Rating


Rain Sensor


Perimeter Cut Mode



35% (19º) inside boundary/ 17% (10º) at wire

Battery Type

Integrated 20V MAX 4.0Ah (replaceable)

Interchangeable Battery


MX 24V Shared Battery System



2 Years

Instruction Manual


LawnMaster L12 Robot Lawn Mower |Up to 800m2
LawnMaster L12 Robot Lawn Mower |Up to 800m2

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