Cobra RM4340VX 40V MAX+ Push Rear Roller Cordless Lawn Mower (with 2 x 40V 4Ah Batteries & Fast Charger)
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The Cobra RM4340VX features a 43cm cutting width, hand-propulsion and a steel rear roller so you can effortlessly achieve a beautifully striped finish on medium to large lawns.
Powered by the latest MAX+ lithium-ion battery technology, the RM4340VX is capable of taking twin 40V MAX+ batteries in its dual port battery housing, the lawn mower's brushless motor draws from one battery at a time giving double the run time. The batteries simply slot and click into position in the battery compartment and are easy to remove for recharging on the fast charger provided. You can easily test the state 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.
A sturdy 43cm (17") steel cutter deck features six 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 single height of cut adjustment lever which has been conveniently positioned next to the rear roller so you can set the mower up according to mowing conditions.
The mower is equipped with a roomy 50 litre grass bag, perfect for collecting a large volume of grass clippings before the need to empty. For optimum collection, even of damp grass, the RM4340VX 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.
Enjoy a beautifully striped lawn with the Cobra RM4340VX 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.
NB: 2 x 4.0Ah batteries and fast charger INCLUDED.
Important: 40V MAX+ batteries are NOT compatible with Cobra's original 40V machines.
Cobra’s 40V cordless machines have evolved .... introducing the 40V MAX+ lithium-ion battery system, the ultimate solution for power, convenience and eco-friendly gardening.
The Cobra 40V MAX+ batteries are a step ahead of the competition in terms of technology and innovation. This advanced intelligent battery technology manages power efficiency to deliver optimal performance and longer run time. Build directly into the battery pack, this smart system allows the battery to recognise the specific Cobra tool it is being used with, automatically optimising output for peack efficiency.
The 40V MAX+ batteries offer several advantages: one battery fits all 40V MAX+ tools, they deliver high-performance power, run longer, and recharge faster. This advanced lithium-ion technology powers a comprehensive range of garden tools, including lawn mowers, strimmers, blowers, chainsaws, and a versatile multi tool.
With Cobra’s 40V MAX+ battery system, you can enjoy long-lasting power and quick recharging, making your gardening experience a pleasure.
One battery, endless potential. Future-ready power, today.
BATTERY COMPATIBILITY
This mower is exclusively compatible with Cobra's 2nd Generation 40V MAX+ range introduced in 2025.
Tools, batteries and chargers from Cobra's 1st Generation 40V Original range are NOT compatible with the 2nd Generation 40V MAX+ range.
| Brand | Cobra |
|---|---|
| Battery Housing | Twin port |
| Battery | 2 x 40V MAX+ lithium-ion included |
| Battery Voltage | 40V |
| Battery Capacity | 4Ah |
| Battery Charger | 4A VX fast charger included |
| Motor | Brushless |
| Start Method | Electric, push button |
| Propulsion | Hand push/pull |
| Width of Cut | 43cm / 17" |
| Cutter Deck | Steel |
| Minimum Cutting Height | 17mm |
| Maximum Cutting Height | 75mm |
| Cutting Height Adjustment | Central, 6 stages |
| Collection System | Fabric grass bag with hard lid |
| Collector Capacity | 50L |
| Fill Level Indicator | Yes |
| Side Discharge | No |
| Handle Type | Folding, cam lock |
| Rear Roller | Yes |
| Rear Roller Type | Steel, full width |
| Warranty | 2 years for domestic use |
| Promotional Image | /c/o/cobra-40v-max-lithium-ion_9_1_1.jpg |
40V MAX+ battery systemBuilt directly into the battery pack, this smart system allows the battery to recognize the specific Cobra tool it’s being used with, automatically optimising output for peak efficiency. The 40V MAX+ batteries offer several advantages: one battery fits all 40V MAX+ tools, they deliver high-performance power, run longer, and recharge faster. |
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Beautiful striped finishEquipped with a full-width rear roller, the Cobra RM4340VX is designed to create a traditional striped lawn finish that adds a professional, beautifully manicured look to your garden. The roller also provides added stability when mowing along edges, allowing you to cut with confidence right up to flowerbeds, borders, and pathways. This makes it easier to maintain clean, defined lawn edges |
43cm / 17" cutting deckThe Cobra RM4340VX is equipped with a durable 17" (43cm) steel cutting deck, designed for precision and reliability. This compact deck size, combined with a high-performance blade, ensures a clean, consistent cut across every pass. Ideal for medium lawns, the 43cm width strikes the perfect balance between detailed control and efficient coverage, making it easy to maintain a perfectly striped lawn. |
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17-75mm cut heightsWith a fully adjustable six-stage cutting height range from 17mm for a precise low finish, up to 75mm for tackling longer, more demanding grass, the Cobra RM4340VX delivers the versatility needed for various lawn conditions and cutting preferences. Adjusting the height is quick and effortless using the single height-of-cut lever, conveniently located next to the rear roller. This user-friendly design makes it easy to achieve your desired finish with confidence and control. |
Push-propelled driveThe push-propelled Cobra RM4340VX offers lightweight manoeuvrability and smooth, responsive control, allowing you to easily guide the mower around garden borders, flower beds, and tight or awkward spaces with confidence. Its well-balanced design provides a more active and engaging mowing experience, giving you complete control over pace and direction while maintaining precision on all types of terrain. |
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Ergonomic controlsThe Cobra RM4340VX features ergonomically-positioned controls that put comfort and control at your fingertips, making every mowing session easier and more intuitive. Combined with its balanced design and self-propelled drive system, the mower reduces operator fatigue and delivers a consistent pace across all types of terrain. Whether you're navigating around borders, flower beds, or tight garden spaces, the RM4340VX offers smooth handling and precise control. |
Effortless controlThe Cobra RM4340VX offers effortless control and superb manoeuvrability, thanks to its lightweight, well-balanced design. Its agile body makes it easy to steer and reposition, allowing you to move freely and confidently around the garden. Whether you're mowing open lawns or navigating tricky corners, it delivers a smooth and comfortable experience every time. |
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50 litre grass bag capacityThe Cobra RM4340VX comes equipped with a spacious 50 litre grass bag, allowing you to mow for longer without constant stops to empty. Its high-performance collection system ensures excellent pickup and a clean, tidy finish on every pass. Whether you're tackling small lawns or larger areas, it delivers efficient mowing with minimal interruption. |

ABOUT COBRA GARDEN.....

Cobra Garden - The Most Comprehensive Range of Garden Machinery in the UK
Cobra garden machinery was launched in the United Kingdom in 2013 and is supported by Henton & Chattell Ltd, giving Cobra the benefit of over 90 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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