Flymo Mighty Mo 300 Li Cordless Lawnmower UK Review 

 April 6, 2021

By  Enda

Thanks for taking your time to read our review on the  Flymo Mighty Mo 300 Li Cordless Lawnmower . This is a 40V cordless lawnmower, with a 30cm cutting width, 5 adjustable cutting heights and a 30 litre grass box.

This model sells really well online as it is suitable for lawns up to 250 square metres, comes with a 40V battery and a charger. It comes with a 2 year guarantee, all for under £250. Overall it is a good quality package at a sensible price.

Once you own the batteries and charger, they can also be used with the whole family of Flymo garden tools that include leaf blowers, strimmers and hedge cutters. You can buy these other products as tool only, which makes them cheaper, and then simply use the batteries and charger that you get with this useful mower.

In a Hurry?

Below we have reviewed this lawn mower in a lot of detail. However, if you don't have time to read all of the information, then you can check the availability at Amazon UK by clicking the button to the right.

How Online Buyers Rate this Mower

Buyer Satisfaction
  • On average over 1,500 online buyers rate this hedge trimmer with an 85% buyer satisfaction
  • 64% of those same buyers gave this a full 5 star review
  • 10% of all buyers have given this a low review.

What Online Buyers Say-Pros & Cons

Just below we have summarised what online buyers had to say about this cordless lawnmower, once they had bought and used it. This information provides a good insight into the quality of any product.


  • Buyers say this mower is light and so easy to move around that it is a joy to use
  • The vast majority of buyers said it is very quick to assemble
  • Buyers liked that this mower is quiet and also folds flat for easy storage
  • Buyers said it is lightweight but still has enough power for cutting
    The majority of buyers said this did a very good job of cutting their lawns


  • A few buyers said the battery is fiddly to get in and out
  • Some buyers said the grass box is awkward to assemble


Suitable for lawns up to 200 square metres

Battery Voltage - 40V

Charge time- 2 hours

Mowing time- 20-30 minutes

Cutting Width - 30cm

Cutting Heights- 25-65 mm

Grass Box- 30 litres

  • The model number is 9671035-01
  • Measures 115 x 102 x 39.5 cm and weighs 9.9 Kg
  • It is a 40V cordless lawn mower and comes with one 40v, 2.0Ah battery and a charger
  • It has a steel blade
  • It takes 2 hours to charge the battery which gives you 20-30 minutes mowing time
  • 5 adjustable height settings from 25-65 mm using a single lever system
  • A 30 litre grass box
  • The arms fold for easier storage
  • Removable safety key disables the lawnmower to help prevent accidental starting
  • 2 year warranty on the mower 

Main Review

We have completed a full review just below, and we have concentrated on the key features that you should consider before buying this model.

EAsy to use
easy to asssemble
battery life

Ease of Use

The good news about any cordless mower is that they are very easy to use. As long as you remember to have your battery charged, then simply plug it in, and away you go. There are no leads to worry about and you can take it just about anywhere you like as you don't need an electrical supply.

This Mighti-Mo model is light to move around and the wheels are big enough to get through the grass. It doesn't get right up to the edges and is about 1-2 cm shy of that. It is fast and does a very good job of cutting the grass.

Quite a few buyers do complain about the battery jumping out, and that is not ideal, especially if you have a bumpy lawn. It won't be an issue on flat lawns, but for those with humps and bumps, that could get annoying.

Ease of Assembly

When we read through the reviews, the time varies as to how long it takes to assemble this mower. It does come in several pieces inside the box. The instructions are easy enough to understand. From start to finish, it will take about 15 minutes to set it up.

Some buyers have said that the grass box is really fiddly to put together. Other than that, there are no major issues with assembly.

Battery Life

This does get mixed reviews. It seems capable of lasting long enough for smaller gardens, but would not be any good on medium to larger garden sizes. Just be aware of that if you are thinking about buying this particular model.

It takes a couple of hours to charge the battery, so if you don't get your lawn finished, that can be a long wait.

Why Pick this Flymo Lawn Mower?

It's Cordless

By owning a cordless lawnmower of any type or brand you instantly get a few clear benefits:

  • It is environmentally friendly when compared to petrol mowers
  • No trailing leads to worry about and no extension leads either
  • The battery and charger can be used with other compatible brand tools - that means you can buy those as tool only at a much cheaper price
  • Cordless mowers are very quiet when compared to other types of mowers.

Price Comparison

Cordless mowers vary in price from £150- £900. That will depend on the brand, the features and the quality of the build. Mowers with wider cutting widths are more expensive. Having more height adjustments make these more expensive. Being IPX4 rated for use in wet weather also make them more expensive.

This Flymo model sits at around £260 depending on where you buy it. For the mower, a battery and a charger, this is a about the right price for a small mower.

The majority of online buyers thought it was good value for money, but opinion is divided between those who think this is lightweight and handy, to those who think it is just not worth it.

The Size of your Lawn

It doesn't take long to work out the size of your lawn. You just simply pace it out. A good stride is about a metre long so when we did our front garden it was about 6 metres x 6 metres, and the back garden was 5 metres by 20 metres.

A simple multiplication tells us that the front garden is (6x6) 36 square metres and the rear is (5x20) 100 square metres. So we need a mower that can mow up to around 136 square metres with a single charged battery.

You should do the same as that will help you buy the right cordless mower for your needs.

This Flymo model can handle up to 200 square metres from one charge. Both lawns should be easy to cut in around 15 minutes, so we know the battery will cover that with a little bit of life left.

If you have gardens bigger than this, then this is not the one for you. This mower has a small 30cm cutting width (around one foot) so it would take a lot of passes to cover a larger lawn.

Manufacturer's Guarantee

It is all too easy to forget when purchasing something new to think carefully about the warranty/guarantee.

With any Flymo tool there is a 12 month guarantee and by registering the products on flymo.com the warranty will be expanded by a further 12 months.

All claims made against the manufacturer's warranty must be supported by proof of purchase i.e. receipt of purchase.

Customer Service & Support

email: customerservices@husqvarna.co.uk

Phone: 0344 844 4558

Their customer service is FLYMO UK, Preston Road, Aycliffe Business Park, County Durham, UK, DL5 6UP

Our Verdict on the Flymo Mighti-Mo 300

85% customer satisfaction based on 1,500+ online buyer reviews

This Flymo model sells consistently online and is about the average price you can expect to pay for a small cordless lawnmower with a battery and charger.

If you have a garden lawn area of less than 200 square metres, this mower is going to be able to handle that on a single charge.

We would stress that this model is really only suitable for small gardens, so just be fully aware of this. It will work well enough on those, but anything bigger and you will be disappointed, according to the buyer reviews.

Also be aware of the battery issue we mentioned earlier, as that seems to generate the most complaints.

For anyone though, who just wants the simple convenience of pulling out a lawnmower, getting the grass cut quickly, and then storing it away to the next time, this one will do the job nicely. There are better and higher quality models out there, but they will also mean having to take a few more notes out of the wallet.

If this is not the cordless lawnmower for you, then check our cordless mowing options

About the Flymo Brand

Flymo are a brand that forms part of the Husqvarna group, who are known primarily for their chainsaws, and also for their robotic lawn mowers and garden tractors.

They have dominated the hover mower market in the UK for many years, and make a range of different types of hover mowers. Flymo do build all their own mowers here in the UK, and have been doing so for 50 years.


I am someone who enjoys a little gardening. Now I am not someone who spend hours in the garden, but I do like both my front and back gardens to look really nice. Well kept lawns, neatly trimmed hedges, and borders filled with plants, make a huge difference, to how your property looks.

Enda McLarnon

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