Cobra RM51SP80V 80V Self-Propelled Rear Roller Cordless Lawn Mower (with 2 x 40V 5Ah Batteries & 2 x Fast Chargers)

£674.99(inc VAT)
RRP: £737.99
In stock
Product Code
Delivery Time:

MOWER & CHARGER: Usually next working day if ordered before 3pm. BATTERY: Sent separately as hazmat delivery so please allow 2-5 working days

The feature-packed Cobra RM51SP80V cordless lawn mower features a generous 51cm cutting width, self-propelled drive and a steel rear roller so you can effortlessly achieve a beautifully striped finish on medium to large lawns.

Powered by the latest lithium-ion battery technology, the RM51SP80V employs twin 40V 5Ah batteries to power the 80V brushless motor. Both batteries simply slot and click into position in the battery compartment and are easy to remove for recharging on the two rapid battery chargers provided. You can easily test the level of the batteries by pushing a button on the batteries themselves, or on the handlebar of the mower.

Easy push button start and lithium-ion technology means the mower is always ready to use, suffers from no self-discharge and has no memory effect. The safety key must be inserted into the machine before starting and removed to prevent accidental starting.

A sturdy 51cm (20") steel cutter deck features seven fully adjustable cutting heights which range from 17mm for a low finish, up to 75mm for tackling longer grass. Raising and lowering the deck is achieved by simply using the central height of cut adjustment lever which has been conveniently positioned next to the rear roller so you can set the mower up to suit the mowing conditions.

The mower is equipped with a spacious 70 litre capacity grass bag, perfect for collecting a large volume of grass clippings before the need to empty. For optimum collection, even of damp grass, the RM51SP80V also has an integral fan beneath the deck. The grass bag has a grass fill indicator which flaps until the bag is full and is made from a robust, high quality fabric which enables a strong, free flow of air making grass collection even more compact and comprehensive. 

At 33kg the Cobra RM51SP80V is a lightweight and manoeuvrable rear roller mower. When the mowing is complete, the handlebars fold over for space-saving storage in your shed or garage.

Proud to be at the forefront of the cordless evolution, Cobra battery-powered mowers are packed with innovative features to help you maintain your lawn with the minimum of effort in the most environmentally-friendly way.  They deliver petrol-matching cutting power without the fuss, mess and fumes of petrol or the restriction of an electric power cord.


More Information
Brand Cobra
Battery 2 x Samsung lithium-ion (included)
Battery Voltage 2 x 40V = 80V
Battery Capacity 5Ah 180Wh
Battery Charger Included
Rapid Charge Time Approx 45 mins
Approx Run Time Up to 45 mins
Motor Brushless
Start Method Push button
Propulsion Self-propelled
Cutter Deck Steel
Width of Cut 51cm / 20"
Minimum Cutting Height 17mm
Maximum Cutting Height 75mm
Cutting Height Adjustment Central, 6 stages
Collection System Fabric grass bag with hard lid
Collector Capacity 70L
Bag Full Indicator Yes
Side Discharge No
Handle Type Folding
Rear Roller Steel
Vibration Level Data 2.5 m/s² K=1.5m/s²
Sound and Noise Data Sound Pressure Level at The Operator’s Position: 83.5dB(A) K=3 dB(A)
Measured Sound Power Level: 94.5dB(A) K=0.88dB(A)
Guaranteed Sound Power Level: 96dB(A)
Weight Without Battery 35kg
Warranty 2 years for domestic use
Promotional Image /c/o/cobra-80v-max_1.jpg


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Cobra Garden - The Most Comprehensive Range of Garden Machinery in the UK

Cobra Garden Machinery was launched in 2013 and is supported by Henton & Chattell Ltd, giving Cobra Garden the benefit of over 85 years experience in the garden machinery and horticultural Industry.

The Cobra Garden range is constantly expanding and now consists of over 130 products to cover both your domestic and professional requirements. Cobra incorporates a comprehensive range of petrol, electric and cordless lawn mowers, hand-held machines and lawn care products. Cobra Garden products are available across the UK throughout a network of approved specialist dealers. As a Cobra Garden approved dealer, The Green Reaper has the knowledge and experience to help you purchase the correct Cobra Garden product for your requirements. We will also provide expert after-sales assistance if needed.

Cobra Garden’s philosophy is to remain true to its trusted values of innovation, quality, reliability, value and customer service. Cobra Garden works hard to ensure that the products and services on offer continue to be relevant to its customers.


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Cobra RM51SP80V 80V Self-Propelled Rear Roller Cordless Lawn Mower (with 2 x 40V 5Ah Batteries & 2 x Fast Chargers)
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