Cobra RM4140V 40V Li-Ion Cordless Rear Roller Lawn Mower
RRP: £385.00
OUR PRICE: £359.99 (inc VAT)
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A welcome addition to the Cobra 40V li-ion range is the new RM4140V lawn mower. What is so special and totally unique about this model is that it is equipped with a full width rear roller. For the first time, you can achieve a traditional striped finish on your lawn with a battery-powered lawn mower. The roller also gives you the ability to mow right up to the edge of flowerbeds and borders.

The quality metal deck with a cutting width of 41cm (16") features seven fully adjustable cutting heights ranging from 25mm for a superb low finish, up to 75mm for tackling longer grass. Grass clippings are collected into a generous 50 litre fabric grass bag.

The Cobra RM4140V is hand-propelled and powered by a 4Ah 40V Samsung lithium-ion battery. The mower will run for up to 30 minutes (in ideal cutting conditions) on a single 90 minute charge.

The Samsung 40 volt lithium-ion battery offers a quiet yet powerful and lightweight combination, is an environmentally-friendly alternative to a petrol-powered lawn mower and gives you the freedom to mow without the restraints of an electric power cable. A built-in battery power indicator allows easy monitoring of battery life. 

Product specification

Brand: Cobra
Battery: 1 x Samsung lithium-ion
Battery Voltage: 40V
Battery Capacity: 4Ah
Battery Charger: Included
Battery Charge Time: Approx 90 mins
Rapid Charge Time: 80% charge in 45 mins
Approx Run Time: 30 mins (with 4Ah battery)
Start Method: Push button
Propulsion: Hand-propelled
Width of Cut: 41cm / 16"
Minimum Cutting Height: 25mm
Maximum Cutting Height: 75mm
Cutting Height Adjustment: Central, 7 stages
Collection System: Fabric grass bag with hard lid
Collector Capacity: 50L
Handle Type: Folding
Rear Roller: Yes
Warranty: 2 years
40v li-ion battery

40V lithium-ion battery expertly powering Cobra lawn mowers

The 4Ah Samsung 40v lithium-ion battery offers a quiet, yet powerful and lightweight combination. Lithium-ion technology means the tool is always ready to use, suffers no self-discharge and has no memory effect.

A closer cut with Cobra

Cobra lithium-ion cordless lawn mowers feature seven cutting heights ranging fro 25mm to 75mm, achieved by simply using the single lever height of cut adjustment lever which has been conveniently positioned next to the rear wheels.

Battery power indicator 


Easily monitor your li-ion battery life with the battery power indicator

The cordless lawn mower comes equipped with a battery power indicator which is conveniently located between the handles. By simply pressing the power button, LED lights will give the operator a visual display of how much power is left in the lithium-ion battery.

50 litre grass bag

Large capacity grass bag for increased collection

The 50 litre grass bag is ideal for collecting large amounts of grass clippings before the need for emptying. The grass bag is made from a robust, high quality fabric which enables a strong free flow of air for even more compact and comprehensive grass collection.

2 year warranty

2 year warranty

Cobra battery-powered lawn mowers are covered by a two year manufacturer's warranty.


Cobra banner lawnmower

Cobra Garden machinery has been expertly designed in the UK to cater specifically for the changing conditions of the British garden. With a comprehensive line-up of quality and innovative products to tackle any gardening task, Cobra is the newest evolution in garden machinery. 

Cobra Garden Machinery was launched in 2013 and is supported by the Henton & Chattell Ltd Group, giving Cobra Garden the benefit of over 80 years experience in the garden machinery and horticultural industry. In 2014 the Cobra Garden portfolio has been expanded and now consists of over 80 products, to cover both your domestic and professional requirements. This portfolio incorporates a comprehensive petrol and electric range of walk-behind, self-propelled, push and hand-held machines. In 2015, Cobra introduced its first battery-powered lawn mower range.

Cobra Garden products are available across the UK, throughout a network of approved specialist dealers. Cobra approved dealers have the knowledge and experience to help you purchase the correct Cobra garden product for your requirements. The dealers will also provide expert after-sales assistance when your Cobra Garden product requires servicing.

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 company offers products and services that continue to be relevant to its customers.


View Cobra brochure

Add review
5 Star Rating
Jul 22 2019
Terry McGill
Bought as a replacement for my Petrol lawnmower. Excellent Company Excellent Price Would buy again from the Green Reaper
Jun 14 2018
Wanted a cordless rear roller inexpensive mower to supplement a robotic mower for doing edging and occasional trimming grass if too long. Cobra RM 4140V fits this requirement. Promptly delivered and adequately packaged. The Green Reaper was very helpful.