Bosch Rotak 32 LI Review

The conclusion of our Bosch Rotak 32 LI Review:

The Bosch Rotak 32 LI includes features such as a 32cm blade size, three cutting heights, a charge time of 90 minutes and a free run time of 30 minutes. The Bosch 32 LI cordless lawnmower covers a lawn reaching 300 metres squared, weighing just 10.2 kg and comes supplied with a 31 litre grass box.

Bosch Rotak 32


The Bosch Rotak 32 LI Ergo-Flex Cordless Lawn Mower is quite easily the most feature rich, high quality model on the market.

Below you will learn about all the great (and not so great) features of this mower and not only that, this mower is built in the UK. Why dose this matter? well, customer service, warranty, quality and the availability of spare parts are second to none.

I would say that it competes very well with the likes of the Flymo Mighti-Mo 300 and the WORX WG779E.2. They are all very similar in terms of deck size and cover a similar amount of ground but are they all as good as each other?.

By the end of this review you’ll know exactly which one to choose for your garden.

The Bosch Rotak 32 LI Ergo-Flex is indeed packed with features found in more higher end cordless mowers and certainly has the ability to cut a lawn up to 300 meter square (roughly a little larger than the size of a tennis court) , but it needs to be compared to it’s nearest rival, the Flymo Mighti-Mo 300, to judge how good this mower really is.

Below I’ll be detailing all the features and functions of the Bosch Rotak 32 LI Ergo-Flex, both good and not so good and then comparing to the Flymo Mighti-Mo 300 so you understand exactly what you’re getting for your money.

Main Features:

    • Rating: 9.4/10
    • Covers areas reaching 300m² in size
    • 36-volt/2.6 Ah lithium-ion battery
    • Blade length: 32 cm
    • Weight: 10.2 kg
    • Number of Cutting Height: 3 (30mm – 60mm)
    • Grass box capacity: 31 L
    • Charge time: 90 minutes (80% charge in only 45 minutes)
    • Free run time: 30 minutes


To give you a visual representation of the Bosch Rotak 32 LI Ergo-Flex please watch the video below:


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Bosch Cordless Lawnmower Rotak 32 LI (1 Batteries, Grass Box 31 l,...
342 Reviews
Bosch Cordless Lawnmower Rotak 32 LI (1 Batteries, Grass Box 31 l,...
  • The Rotak 32 LI cordless lawnmower - a compact lawnmower for urban gardens
  • Cordless freedom due its light weight and no cables or exhaust fumes
  • Enjoy a comfortable and healthy working position while mowing with ErgoFlex handles
  • The grass combs ensure clean results along lawn edges, flowerbeds, walls and paths
  • Items included: Rotak 32 LI, 1x battery pack 36 V/2.0 Ah LI, AL 3620 CV charger, 31 l grass box, cardboard box

Power System

Before we look at the batteries on this mower, it’s import to know that Bosch lead the way with lithium ion battery technology in 2007 and continue that development to this day.

Like many cordless lawn mowers, the Bosch Rotak 32 LI is powered by a Lithium-ion battery (36V) and electrical motor which it will charge in around 90-100 minutes. The battery is removed from the mower for charging and storage.Bosch Rotak 32 Li Battery Change

Now, 90 minutes is in itself very respectable when you compare it to the almost 2 hours for its rival the Flymo  Mighti-Mo 300.

But that’s not all!

What makes the Bosch Rotak 32 LI stand out from it rival is the ability to charge the battery to 80% capacity in just 45 minutes. Believe me this is a great feature that provides outstanding convenience to the average gardener.

A fully charged battery can mow up to 300m² or around 30 minutes run time depending on length and condition of the lawn. Again, this out performs the Flymo at 250m², well done Bosch.

The Bosch Rotak 32 LI also has a feature they call “Efficient Energy Management” that Bosch claim will extend operational time by up to 15%. This system adjusts the power delivered to the rotary blade to conserve power when not needed. Again a nice feature on a mower at this level.

Bosch Rotak 32 Li Battery ChargerThe charge to mow time ratio is really very good for a cordless mower at this price point. Ideally you will choose a mower that has enough run time to mow your entire lawn or lawns, but this mower allows you to have a tea break, recharge the battery in 45min and then continue. If your lawn is less than 300m² then this is not going to be an issue or a feature you will use, but with a 45 min charge time (to 80%) this mower is still an option for larger lawns.

Also the power system is completely electric so it produces zero emissions and works extremely quietly. Which is quieter? well there’s not much between them but would say the Bosch Rotak is slightly quieter due to the “Low-noise design” that Bosch claim makes there mower barely audible from 10m.

The great thing about these mowers is that you can set out to work at any time you want without it annoying you, your family or your neighbours, and with zero emissions look after the environment as well.

Please note: there is an option to purchase this mower with a 36 V / 2.0 Ah battery. This changes the charge times slightly to the following:
Quick charge time: 70 mins| 80% capacity in 40 mins.

Model Comparison

  • Lawn Coverage
  • Noise Level
  • Mowing Time
  • Charging Time
  • Cutting Width
  • Weight
  • Grass Box Capacity
  • Cutting Heights
  • Rating

Bosch Rotak 32 LI

  • 300 m²
  • 75 dB
  • 30 minutes (300 m²)
  • 90-100 minutes (80% charge in only 45 minutes)
  • 32 cm
  • 10.2 kg
  • 31 L
  • 3 (30mm – 60mm)
  • 9.4/10
  • 250 m²
  • 85 dB
  • 25 minutes (250 m²)
  • 120 minutes
  • 30 cm
  • 9.94 kg
  • 30 L
  • 5 (25mm to 65mm)
  • 9.3/10


The Bosch Rotak 32 LI is equipped with one 32cm metal mower blade that gives them two very effective benefits…bosch rotak 32 blade

  1. Metal blade generally wear less quickly than plastic blades which results in you needing to replace the lawnmower blades more often than a lawnmower that uses a metal blade.
  2. Metal blades are generally sharper and provide a cleaner cut to the grass blade, resulting in a neater, tidier and superior finish to your lawn and garden. The metal blades on the Bosch Rotak can be sharpened when needed unlike plastic blades.

This again does not necessarily put it ahead of competitors but it’s good that Bosch have taken advantage of what is clearly the most effective cutting system in the market.

As well as being able to sharpen the blades, it is also possible to purchase a replacement blade. Replacing the blade is relatively easy for anyone with basic DIY skills and tools.

Height Adjustment

In order to combat the changing season and to continually improve the look of your lawn, you can adjust the height at which the Bosch Rotak 32 LI cuts at. This is done very easily using the lever located at the front side of the mower.


It lets you choose to cut from anywhere between 30mm to 60mm with 3 separate cutting lengths. Just make sure you don’t set it at the shortest setting from the when the lawn has significant growth, instead start at a much higher setting and gradually work your way down. This gives the areas of small grass to catch up with the long, resulting in a more even garden.

Having said that this mower does come with a built in comb that helps prevent scalping your lawn if the setting is a little low or there is an uneven patch. This is a nice touch not found on other mowers in the class. The comb also helps to ensure you get a good cut right up to the edge along flower beds, fences and walls.

Normally I would complain that levers mounted on the front of a mower are always more difficult to adjust than those mounted more centrally, however the design of the height adjustment lever on the Bosch Rotak seems to work very well. Bosch have managed to mount the lever out of the way in the front but still allow for the height to be adjusted centrally, very nice!

Cutting Diameter and Height

The cutting diameter of the mower may seem a little on the small size with only a 32cm mowing capability, but that is 2cm larger than its rival the Flymo 300. Now, compared to it’s other counterparts with widths of up to 43cm, this might be a potential disadvantage; however, it could also be beneficial if it’s to be used in a smaller areas and lawns with more narrow strips.

When you need a mower that’s light in weight and going to get in the smaller areas of your lawn, this may well be the best option. Yes it will take longer to mow the entire area, but if it fits, and hey there’s no rush then the Bosch Rotak 32 LI could be the cordless  mower of choice. Remember this mower also has a very impressive mow/run time so the smaller deck size should not be an issue.

As mentioned above this Bosch has combs on either side that guide the grass into the path of the blades, meaning you really are getting the full 32cm cutting diameter and reduces the amount of trimming around the edges when the mowing is done.

Roller (stripes)

Like a stripey lawn? Well the Bosch Rotak 32 LI does come with an Integrated Rear Roller for a lovely stripey lawn.

Grass box capacity

As with all smaller cordless lawn mowers the grass box is not going to hold as much it’s larger counterparts, however 31 litres is a comparable for a mower of this size. 31 Litres allows longer periods of use without needing to empty grass clipping as often.

The grass box on the Bosch Rotak 32 LI is very well engineered and very easy to remove, the grass clipping empty from the box with no obstructions.

There is also a fill level indicator on the grass box.

Now, what sets this mower out above the rest is the incredible performance in collecting 99% of the grass clippings. Does this make it better than the Flymo? Yes, not only the Flymo but almost all the mowers we have tested. The Bosch Rotak 32 LI will not disappoint when it comes to collection and emptying of the grass clippings.


The Bosch handle design is ergonomically shaped, adjustable and multi-functional allowing for a better body posture and reduced muscle strain. Bosch call this their new “Ergoflex System”. and it really does assist in making mowing the lawn that bit easier.


The light weight, small size and fold away handles make this mower excellent for smaller lawns or lawns with smaller strips of grass.

This really will make lawn care much easier and really makes the entire experience much less dependent on you struggling with a heavy over sized mower.

As with all cordless lawn mowers, not being tethered by the cord not only make it easier to mow the lawn, but safer, quieter and more environmentally friendly.

Does this make it more practical the it’s closest  competition? well, yes I think it does for people with smaller lawns and limited space for storage. There is also a very handy and well positioned central handle that makes carrying the almost 10 kg  mower to the garage or shed very easy.

Bosch 32 li Saftey Plug

Safety Features

What I really like about the Bosch Rotak 32 LI is the addition of a removable safety key that disables the lawnmower to help prevent accidental starting. This is a nice feature not always found on similar cordless mowers that give peace of mind around children.


As with most cordless lawn mowers in this class and at this price range, there is no mulching facility with this Bosch.

Bosch Rotak 32 LI User Manual

You can download the Bosch Rotak 32 user manual guide here


What’s Included in the box?

  • The mower itself
  • 1 battery pack 36V/2.0Ah lithium-ion battery
  • Charger
  • 1 x 31 Lt grass box


  1. This mower can be a little tricky to assemble first time. It is only the handles that need assembling and once done all is good. The instructions are lacking any written detail on assembly.
  2. Only 3 height settings. This is a shame as most of the Bosch’s competitors have at least 5 height settings.

Now the above may sound trivial and are common to most cordless mowers but should be taken into consideration anyway. They are part of the package and it’s better being aware of them before a purchase than after.

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Overall this is an excellent mower, due to it’s light weight, portability, good build quality and array of features.

I really struggled to find any major downsides to this mower, it even comes with a 2 year warranty that can be extended to 3 years if you register the mower with Bosch. You simply wont get this with any other manufacture.

The extra features like the removable safety key is a nice touch but one that you most probably never use, besides you want features that will help achieve a lovely looking lawn with least amount of work and effort.

The Bosch Rotak 32 LI is very proficient at cutting varying lengths and thickness for such a small and compact cordless mower, the only sight disadvantage is you only have 3 different height settings. It’s worth mentioning that by cutting more regularly and avoiding very long or wet grass this should avoid not putting too much strain on the battery. Remember to always keep the battery charged and in a dry place over winter.

With this mower you’re getting features normally found in high priced mowers, so this is a very reasonable priced.

But do I think it’s better than its closest competitors?

Yes I do!

At this price range this really gives great value for money and you would be very hard pressed to find a cordless mower that performs this well, and has such a good build quality for this price. To get the best out of this mower you will need to cut your lawn more regularly and not let the grass grow too high or dense as it will struggle to cut it, this is however common with all cordless mowers at this price point and specification.

Overall I think this is a fantastic mower and I encourage everyone with a garden under 300 m² to purchase one. In fact I think it’s the best mower at this level you can get right now!

Bosch Cordless Lawn Mower Range Comparison

 Bosch Rotak 32 LIBosch Rotak 37 LIBosch Rotak 43 LI
Rotak 32 LI ErgoflexRotak 37 LI ErgoflexRotak 43 LI Ergoflex
Recommended Lawn SizeFrom 150 m 2  - 300 m 2  (Up to 1 tennis court)From 200m 2  - 500 m 2  (Up to 1.5 tennis court)From 300 m 2  - 600 m 2  (Up to 2 tennis courts)
Width of Cut (cm)323743
Power36 V Lithium-Ion battery36 V Lithium-Ion battery36 V Lithium-Ion battery
Number of Batteries112
Battery Charge Time90 mins (80% power in 45 mins)60 mins (80% power in 45 mins)60 mins (80% power in 45 mins)
Height of Cut (mm)30-6020-7020-70
Height of Cut Positions366
Cable Length (m)N/AN/AN/A
Size of Grassbox (L)314050
Weight (kg)
Ergoflex HandlesYESYESYES

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Should You Buy This Model?

Bosch Rotak 32 LiWell there are a few factors to consider first, whether or not you purchase this model really depends on your garden and situation.

To give you some guidance on which type of customer would suit this model best, below I’ve got a list of the categories they would fall under:

  • Their garden is about 300 m² in size
  • Like the convenience of having no power cord or have limited or no access to a power source in the garden
  • Their garden is split up into different areas, with smaller strips of lawn
  • They don’t mind cutting the lawn regularly and not allow the lawn to grow too high
  • Storage is limited

Of course this is open to interpretation so if you don’t fall under every single one then don’t worry I’m sure you’ll still love this product. It has loads of great features that I’m sure you make use of even if you’re not its perfect customer.

Sale - Save £74.49
Bosch Cordless Lawnmower Rotak 32 LI (1 Batteries, Grass Box 31 l,...
342 Reviews
Bosch Cordless Lawnmower Rotak 32 LI (1 Batteries, Grass Box 31 l,...
  • The Rotak 32 LI cordless lawnmower - a compact lawnmower for urban gardens
  • Cordless freedom due its light weight and no cables or exhaust fumes
  • Enjoy a comfortable and healthy working position while mowing with ErgoFlex handles
  • The grass combs ensure clean results along lawn edges, flowerbeds, walls and paths
  • Items included: Rotak 32 LI, 1x battery pack 36 V/2.0 Ah LI, AL 3620 CV charger, 31 l grass box, cardboard box

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Additional Specifications

Working Area 300 m²
Cutting width 32 cm
Cutting height steps 3
Cutting height max 60 mm
Cutting height min 30 mm
Cutting height adjustment Central
Collector volume 31 l
Battery Type 36-volt/2.6 Ah lithium-ion battery
Typical Charging Time 120 minutes (80% charge in only 45 minutes)
Typical Mowing Time 30 minutes (300 m²)
Vision Window No
Right or left start switch Left and Right
Foldable handles Yes
Battery power indicator Yes
Grass bag filling indicator Yes
Roller Integrated for stripped lawn
Product size, folded handle height
Product size, folded handle length
Package Dimensions 59.4 x 40.2 x 36.4 cm
Weight 10.2 kg

Last update on 2019-09-21 / Affiliate links / Images from Amazon Product Advertising API