• Cobra MX51S80V twin 40V cordless 3-in-1 lawnmower
1 13

Cobra MX51S80V Twin 40v Li-Ion 3 in 1 Lawnmower

Cobra MX51S80V Twin 40v Li-Ion 3 in 1 Lawnmower

£589.99
£647.99 £589.99
Sale Sold out
Taxes included. Shipping calculated at checkout.
  • ✓2x 40V 5Ah Li-ion batteries (twin 40V) + 2 fast chargers
  • ✓51cm / 20" cutting width
  • ✓Self-propelled with 60L grass bag
  • ✓80V brushless motor, 3.2 km/h
  • ✓3-in-1: collect, mulch & side discharge
  • ✓Up to 55 mins run time (no load)
  • ✓25-75mm cutting height (7 stages)
  • ✓Lightweight at 29kg
  • ✓2-year domestic warranty
✓ 2 years warranty✓ 30-day returns✓ UK support

Ships direct from Cobra (not from Mowd), typically 2–5 business days. Delivery £9.95.

Good to know
  • ✓Best for larger lawns, cordless 3-in-1
  • ✓2 years warranty
View full details

The Cobra MX51S80V twin 40V Li-ion cordless lawnmower delivers 80V of cutting power, with approximately 55 minutes of run time. With a 51cm cutting width, self-propelled drive and a 3-in-1 cutting system, it's a feature-packed cordless mower.

Specifications

Cutting width
51 cm
Cutting height
25–75mm (7 stages)
Type
Rotary (3-in-1)
Drive
Self-propelled
Power
Battery – 2× 40V 5Ah Li-ion (80V)
Grass box
60 L
Weight
29 kg
Warranty
2 years
Battery power indicator on the Cobra MX51S80V handle

Battery power indicator

The MX51S80V has a battery power indicator on the handle, so you can monitor remaining battery life during operation for convenient, uninterrupted mowing.

Twin 40V batteries powering the 80V brushless motor on the MX51S80V

Double the power (80V)

The MX51S80V is powered by two 5Ah 40V lithium-ion batteries driving an 80V brushless motor. Cobra's 40V lithium-ion technology means it's always ready to use, with no self-discharge and no memory effect - a reliable, hassle-free experience for users who demand both power and convenience.

Single-lever cutting height adjustment on the Cobra MX51S80V

25–75mm cutting heights

The MX51S80V has 7 adjustable cutting heights from 25mm up to 75mm for longer grass - all set with a single height-of-cut lever.

3-in-1 cutting system on the Cobra MX51S80V

Mulch, side-discharge or collect

The MX51S80V has a 3-in-1 cutting system - the traditional cut plus two alternatives. With the mulch plug fitted, you can mulch clippings back into the lawn for a fuller, healthier look. If you'd rather not mulch, simply lift the blanking plate and insert the side-discharge chute to discharge grass in neat lines to the side.

60 litre fabric grass bag on the Cobra MX51S80V

Empty your grass box less

Equipped with a 60-litre fabric grass bag ideal for collecting large amounts of clippings. The robust fabric allows strong, free airflow for compact grass collection.

Why buy from Mowd?

Genuine Cobra machines

Supplied as official Cobra products with full manufacturer warranty and support.

Built to last

Professional-grade build quality designed for years of reliable use.

Ships direct from Cobra

Dispatched directly from Cobra — see the delivery note above for timings.

Expert UK support

Plain-English advice and UK-based help, with warranty service handled by Cobra.

Ready to upgrade your mow?

Petrol, electric, or push, we've got a mower for everyone.

Frequently asked questions

How does the warranty work?
Your mower comes with the manufacturer's warranty. Warranty claims and repairs are handled directly by Cobra Support, and you'll need to register your machine with Cobra to activate cover - see the documentation supplied with the mower for details.
How is my mower delivered?
Mowers ship directly from Cobra (not from Mowd), typically within 2-5 business days. Delivery is £9.95.
Can I return it?
Yes - you have 30 days to return an unused mower, plus your statutory 14-day right to cancel. Get in touch and we'll arrange it.

See all FAQs →