Bosch Rotak 32 LI Review – Ergo-Flex Cordless Lawn Mower

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Bosch Rotak 32 LI


Performance/Cut Quality











  • Narrow Cutting Width
  • Light Weight (10.2 KG)
  • 31 Litre Grass Box
  • Very Good Build Quality
  • Safety Key


  • Only 3 Cutting Heights
  • Not Suitable for Larger Lawns


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

Bosch Rotak 32 Li Review

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

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 will know exactly which one is the perfect mower 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 metres square (roughly a little larger than the size of a tennis court), but it needs to be compared to its nearest rival, the Flymo Mighti-Mo 300, to judge how good this mower really is.

This mower is built in the UK. Why does this matter? Well, customer service, warranty, quality and the availability of spare parts are second to none.

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.

Bosch Rotak 32 LI Review

Main Features

    • Rating: 9.6/10
    • Covers areas reaching 300m² in size
    • 36-volt/2.6 Ah lithium-ion battery
    • Blade length: 32 cm
    • Roller for stripey lawn
    • 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

Bosch Rotak 32 LI Ergo-Flex Video

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,...
  • 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
  • Weight : 10.4 kg

Last update on 2021-01-18 / Affiliate links / Images from Amazon Product Advertising API

Features In Detail

Power System

Before we look at the batteries on this mower, it’s important to know that Bosch lead the way with lithium ion battery technology 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 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 charge time for its rival the Flymo  Mighti-Mo 300.

But that’s not all!

What makes the Bosch Rotak 32 LI stand out from its competitors 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 outperforms 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 in this range.

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 I would say the Bosch Rotak is slightly quieter due to the “Low-noise design” that Bosch claim makes their 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 annoying your family or your neighbours whilst the 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)
  • 9.5/10
  • 250 m²
  • 85 dB
  • 25 minutes (250 m²)
  • 120 minutes
  • 30 cm
  • 9.94 kg
  • 30 L
  • 5 (25mm to 65mm)
  • 9.4/10


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

  1. Metal blades generally wear less quickly than plastic blades which results in you needing to replace the lawn mower blades less often.
  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.


You have the option 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 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.

This mower does come with a built in comb that helps prevent scalping your lawn if the setting is a little too low or there is an uneven patch. This is a nice touch not found on other mowers in this 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 its 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 reach the smaller areas of your lawn, this mower may well be the best option for you. Yes it will take longer to mow the entire area, but if it fits and 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. These combs reduce 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 as its larger counterparts, however 31 litres is comparable to other mowers of this size. 31 litres allows longer periods of use without needing to empty grass clippings as often.

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

There is also a fill level indicator on the grass box that indicates when the grass box needs to be emptied.

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 of the mowers I have tested. The Bosch Rotak 32 LI will not disappoint when it comes to collecting and emptying 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 named 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 compared to the 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 nice and 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 lawn mower to help prevent accidental starting. This is a nice feature, not always found on similar cordless mowers, that provides 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 mower.

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 L 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 adjustments.

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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Pros and Cons

  • Narrow Cutting Width
  • Light Weight (10.2 KG)
  • 31 Litre Grass Box
  • Very Good Build Quality
  • Safety Key
  • Only 3 Cutting Heights
  • Not Suitable for Larger Lawns



Overall this is an excellent mower, due to its 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 directly with Bosch via their website. You simply won’t receive this with any other manufacturer.

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

The Bosch Rotak 32 LI is very proficient at cutting varying lengths and thickness of grass for such a small and compact cordless mower. The only slight disadvantage is that 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 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 very reasonably priced.

But do I think this mower is 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 may 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 purchase 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 listed the categories they would fall under:

  • People with gardens up to 300m² in size.
  • People who like a stripey lawn as it is supplied with a rear roller.
  • People who want a smaller deck size to accommodate smaller strips of lawn.
  • Those who like a light weight mower that has a good build quality.
  • People with garden split up into different areas, with smaller strips of lawn.
  • Storage is limited.

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

Save £75.99
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
  • Weight : 10.4 kg

Last update on 2021-01-18 / Affiliate links / Images from Amazon Product Advertising API

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Last update on 2021-01-18 / Affiliate links / Images from Amazon Product Advertising API

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Bosch Rotak 32 LI FAQs

What is the charge time for the Bosch Rotak 32 LI mower?

90 minutes, but 80% charge in 45 minutes.

What is the free run time of the Bosch Rotak 32 LI?

30 minutes.

What is the width of the cutting blade on the Bosch Rotak 32 LI?

32 centimetres.

How much does the Bosch Rotak 32 LI weigh?

10.2 kg.

Does the Bosch Rotak 32 LI mower have a rear roller for stripy lawn?

Yes, this mower does have a rear roller.

What is the grass box capacity of the Bosch Rotak 32 LI?

Yes, this mower is supplied with a charger and one 2.6 Ah lithium-ion battery.

Does the Bosch Rotak 32 LI come with a removable safety key?

Yes, there is a removable safety key for extra safety.

How many cutting heights does the Bosch Rotak 32 LI have?

3 cutting heights from 30 mm to 60 mm.



Additional Specifications

Working Area300 m²
Cutting width32 cm
Cutting height steps3
Cutting height max60 mm
Cutting height min30 mm
Cutting height adjustmentCentral
Collector volume31 l
Battery Type36-volt/2.6 Ah lithium-ion battery
Typical Charging Time120 minutes (80% charge in only 45 minutes)
Typical Mowing Time30 minutes (300 m²)
Vision WindowNo
Right or left start switchLeft and Right
Foldable handlesYes
Battery power indicatorYes
Grass bag filling indicatorYes
RollerIntegrated for stripped lawn
Package Dimensions59.4 x 40.2 x 36.4 cm
Weight10.2 kg

8 thoughts on “Bosch Rotak 32 LI Review – Ergo-Flex Cordless Lawn Mower

  1. Hi, I enjoyed the review. Could you comment how the mower copes with different types of grass conditions i.e. wet grass, dry grass, slopes, and scruffy grass (uneven surfaces). Thanks.

    1. Hi Stephen

      This Bosch battery mower is fine for normal conditions, dry and lawns that are not out of control. I would always advice cutting the lawn regularly to get the most from a battery powered mower in this class.

      It will cut longer, thicker grass but does reduce the mowing run time significantly and you would need to keep reducing the cutting height.. If you will be cutting a more demanding lawn on a regular basis then a petrol mower would still be the better option.

      I did a test on a similar powered Worx mower and took it over my local park to see just how good it is on more demanding grass. I did surprisingly well, however it was dry. You can see the results in this video (at around 12:06) You will notice that I am tilting the mower up on the first pass and gradually reducing the height, this gave me around 15-20 minutes of run time.

      Slopes and uneven lawns should not be a problem with the Bosch 32LI.

      Hope this helps.


  2. Hi Stephen

    Thanks for your message. Yes a battery powered mower is normally lighter than petrol mowers so will not give as detailed and longer lasting stripes.

    A battery powered mower that I have seen do a great job of cutting and for stripes is the Yard Force 108V Li 46cm Cordless Lawnmower LM T46 – review here

    I think this is mainly down to the weight of the mower at almost 41 kg.


  3. hi mark advise really cost isn’t the issue, Im changing from my petrol mower with rear roller and gives amazinf strips. could you advise on one that gives very good strips cordless please

  4. I ordered the bosch rotak 32 LSi after seeing your reveiw and which reveiw. At the front panel that lifts up there is a gap on the lower part as if perspex is meant to be there, but on mine there is none so part of the perspex is not covered. Is it meant to be like this.

    1. Hi Isabella

      Thanks for your message.

      If you could email me over a photo I will take a look as this does not sound right –

      Also, give Bosch a call, their support is very knowledgeable and helpful – I have included the number below.

      0344 7360109

      Monday – Friday: 08:00 – 17:00

      Let us know how you get on.


  5. I’ve found your reviews very interesting but slightly confusing as two mowers come out on top. I was all set to buy the green works 40v – 35cm cordless at £199.95 from Amazon until I read about the Bosch Rotak 32LI. The Bosch is nearly £100 more. In your opinion is the extra £100 worth it or would the green works suffice. My lawn is about 18m long by 4m width, it’s slightly elevated. I currently use a flymo electric easy glide 330 and used these for many years, however, I am now finding it difficult to push and lift, it also gives me back ache. Your thoughts would be very welcome. Thank you.

    1. Hi Joe

      Both mowers will get the job done equally well. The Bosch does cost more as the quality of build is better and yes you are correct you are paying for it.

      They both give around the same run time but you will get a 3 year guarantee with the Bosch. Also the Bosch has a roller for a stripey lawn.

      The Greenworks does have a slightly larger deck size and a larger collection box and more height adjustments but Greenworks parts are a little harder to obtain than the Bosch as the Bosch Rotak 32LI is assemble here in the UK. Do you have any other Bosch cordless tools as the batteries in interchangeable?

      The Greenworks are very good value for money and would make a good choice.

      Thanks for you comment, I hope this helps a little with your decision.

      Best wishes.

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