Cordless Grass Trimmers

Tested and reviewed by Fred-in-the-shed

Updated 1st May 2019

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Black & Decker 36v Grass Trimmer

Bosch 36v Grass Trimmer

Black & Decker 18v Grass Trimmer

Bosch 18v Grass Trimmers

Small Shrub and Grass Trimmers

Stihl Shrub and Grass Trimmer


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I test Bosch 18v & 36V Cordless Grass Trimmers

& compare to the Black & Decker 18v & 36V Strimmers

Cordless grass trimmers are far more convenient to use than mains powered trimmers. Until recently cordless grass-trimmers suffered from poor battery power and life that is aggravated by seasonal use and long periods of storage.

Due to the high price of a replacement battery, many of these tools ended up at the tip as soon as the batteries failed.

New lithium-ion technology makes these handy power tools far more viable since the batteries are more powerful and can survive long periods of not being used.

All new models use Li-ion batteries so my advice is not to buy any tool with the old Ni-cads as they will be discontinued soon.





Powerful, well balanced, trims horizontal AND vertical edges.

Same battery powers chainsaw and other tools!

 This 36v Black & Decker model works out at about half the cost of the Bosch model but has many advantages.

The replacement spools are much cheaper and it also has the all important head adjustment so it can do vertical edges.

The same, 2 amp hour battery fits the B&D cordless chainsaw, mower, hedge trimmer and leaf blower.


 Black & Decker GLC3630L20-GB 36V Cordless Strimmer

 Black & Decker A6481 Spool & Line For Reflex Strimmer

Black & Decker CLM3820L2-GB 36V 2.0Ah Lawn Mower with 2 Batteries

BLACK+DECKER GKC3630L20-GB 30 cm 36 V Lithium Chainsaw

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Bosch 36V Cordless Grass Trimmer Review

Bosch ART 30-36 - original model shown above

 Bosch AdvancedGrassCut 36    new model

This is the biggest trimmer made by Bosch and uses a dual line made from a new ultra tough material.

It is available with or without a 36v 2 amp hour battery and charger.

This is great if you already have the mower or any of the 36v Li-ion batteries that have been tried and tested over the last 10 years in the Bosch Rotak mowers.

The build quality is very good and it cuts like a demon. Weight and balance is good but would be better with a harness.

The Advancedgrasscut 36 has a fitting for a harness but none is supplied - use link below if you want a suitable one.

 Oregon Strimmer Grass Trimmer Or Brushcutter Double Shoulder Harness Q539173


The downside is this head on the original model only cuts horizontally. So no side trimming!

In 2018 Bosch upgraded the model and now the head can be rotated for better edging.

A Bosch replacement spool with 6m of line costs around 8 or you can buy cheaper line to fit your empty spool if you like fiddling around.

A heavy tool like this really needs a harness - which Bosch have chosen not to supply.

Bosch ART 30- 36Li  Cordless Grass Trimmer & Rotak 37Li Mower


 Different size replacement batteries are available

 2.6 and now 4.0 amp hour replacement 36v batteries

Bosch 36 V Battery 2.6 Ah

 Bosch 36 V Battery 4.0 Ah

If you are cutting large areas of grass or thick weeds then the 36v Bosch trimmer has plenty of power.



 Oregon  Double Shoulder Harness Q539173

  Bosch Strimmer Spool 6 m x 1.6 mm ART 30-36 LI


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Small Lightweight Cordless Grass Trimmers

Best Buy Small Cordless Strimmer Based on 3 years Testing

Black & Decker STC 1820-GB 18v Lithium-ion Cordless Grass Trimmer


This small strimmer uses the standard nylon line in a spool , and a slide-in 18v Lithium-Ion (Li-Ion) battery that holds 2 amp hours of charge. It can be recharged in 2 hours and gives a run time of around 20-30 minutes. I love this strimmer as it is light enough for me to use from my wheelchair and the spool has never got stuck. It is quiet and easy to adjust for people of different heights.

A nice feature is the wheel that enables easy trimming of lawn edges. Just turn the tool on its side and run it along the edge. The handle has telescopic height adjustment with a good range and the line gives a 28cm cut.

On the handle there is also an extra button to switch between eco and turbo mode . The idea is to gain extra battery time by using less power for lighter work. Does it work? Yes, use the low setting just for grass edging, and the high setting for thick grass or weeds.

A unique accessory can transform the tool into a mini mower by attaching a small deck with wheels on. This was an idea I had years ago and was really chuffed to see it appear, and even more chuffed to try it and find that it is ideal for a quick tidy when my small lawn occasionally grows in patches.

Trimmer shown with optional deck attached

 BLACK+DECKER STC1820CM-GB 18V Lithium Strimmer with Lawn Mower Deck Attachment

I would like to make it absolutely clear that this will not replace a lawn mower on anything but the smallest lawn and even then you would have to keep the grass fairly short as the decking attachment is useless on long grass. The reason for this is that the deck prevents the grass from clearing so for long grass use the strimmer without the deck.

I have used this product over 2 seasons and am pretty impressed, it also uses the easily available and cheap A6481 spool.


 BLACK+DECKER STC1820PC-GB 18V Li-Ion 28cm AFS Strimmer

 BLACK+DECKER CM100-XJ 3-in-1 Lawn Mower Deck Attachment

 BLACK+DECKER A6481 Spool & Line For Reflex Strimmer

 Black & Decker BL2018-XJ 18V 2.0Ah Battery


Latest Grass Trimmer Test

A new challenger to the B&D is the Worx 20v model below

 WORX WG163E.1 18V 20V MAX Cordless Grass Trimmer with Command Feed

It is fantastic for lawn edges as the line can be seen from the handle so you get a more accurate cut!

More info soon - or mail me for details.


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Bosch 12v & 18v Cordless Grass Trimmer Range

Bosch ART 26-18 LI  (26 cm Cutting Diameter)

Bosch ART 23-18 LI has a 23cm wide cut

Pictured above is the Bosch ART 26-18 LI cordless trimmer. This is a well balanced and easy to use trimmer and has the all important swivelling head to enable you to trim the top AND side edges of your lawn. It also has a telescopic handle that adjusts to your height. This battery powered trimmer uses small plastic blades instead of a nylon spool. Weight with battery is 3.5kg.

Some people dislike the plastic blades as the original ones were brittle Nylon that broke easily when you trimmed against concrete paths or along brick walls.  However many users prefer them as they are so easy to replace and don't jam up. The alternative, nylon line on a spool, is great when its new but often seizes up with time due to congealed grass, dirt and moisture.

To counter this failing Bosch have introduced a new type of plastic blade that is much tougher and is called the Durablade.

I have been testing these new blades and can confirm that they are tougher and I found it very difficult to damage one, even running it along grass growing against a brick wall. Having said that I think if you are going to trim along hard surfaces you may get a better result with the Black & Decker 18v line strimmer. Plastic trimmer blades are a bit like marmite, people love them or hate them.  It is also worth noting that the 18v trimmers are for domestic use and for cutting GRASS. For anything tougher then I recommend the larger 36v dual line trimmers. 

NEW IMPROVED Blades for Bosch Cordless Trimmers

 Bosch F016800371 23 cm Strengthened Durablade for Grass Trimmer

 Bosch F016800372 26 cm Strengthened Durablade for Grass Trimmers


 Bosch ART 26-18 LI 18 V Cordless Lithium-Ion Grass Trimmer (Baretool)

This new models have an 18v 2.5 amp hour battery and use the black shark fin like plastic safety blades.

Charging time 1 hour - run time approx 35 minutes , weight 2.5kg

This Bosch "Power4 all" batteries can be used in a range of Bosch power tools including the hedge trimmer and combi drill shown below





Use the links below for the best value genuine Bosch 18v Li-ion batteries to extend your cutting time and support this webpage.

Bosch 18V Li-ion Battery 2.0AH

Bosch 18V Li-ion battery 2.5AH


Bosch 12v Cordless Trimmer

Bosch EasyGrassCut 12v Cordless Grass Trimmer

Pictured above is the Bosch EasygrassCut 12v cordless trimmer. It is the little brother of the 18v trimmers but without the swivelling head so its not so good for the side edges of your lawn. This compact and light tool (1.7kg with battery) uses the same small plastic blades as the 23cm 18v Bosch model.

The Bosch 12v batteries are used in a wide range of tools and one I particularly like is the EasyHedgeCut. This is the smallest lightest viable hedgetrimmer you can get and if you have a couple of batteries then it could cut a lot of hedge, not thick hedge but your average seasonal growth of privet. These small cordless tools are ideal for small modern gardens and smaller users.


 Bosch EasyHedgeCut 12-35 Cordless Hedge Cutter 350 mm Blade 15 mm Tooth Opening

 Bosch EasyGrassCut 12-230 Cordless Grass Trimmer with 12 V Lithium-Ion Battery, Cutting Diameter 23 cm

 Bosch 12 V 2.5 Ah Lithium-Ion Battery




This is similar to the Bosch 18v trimmer with the swivelling head and plastic blades instead of a nylon spool. It also has an adjustable top handle and only weights only 1-75kg. The blades are more brittle than the Bosch blades and the offer of "free blades for life" is dependant on you paying 4.99 postage each time for 10. So as the blades are only available this way I would say they are 4.99 for 10, which is cheaper than the Bosch durablade but these will last longer so may work out cheaper in the long run if you trim against hard surfaces.

Click here for more info on Gtech cordless garden tools

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Small Battery Powered Electric Grass Shears

Metal Bladed - "Clipper Type"

Von Haus versus Bosch Isio

Alternative to Nylon Cord Grass Trimmers

Electric trimmers that cut with a Nylon cord often fail to self feed and can be hard to replace or find replacement cord.

The plastic blades are easier to replace but have a nasty habit of breaking when they hit something hard like a path or edging material.

For small jobs I prefer an electric version of the sheep shear that has long lasting  metal blades and a lithium ion battery that can run for up to 60 minutes.

This type of tool has been around a long time and is well tested. The Bosch Isio is the most versatile as it can be fitted to a telescopic handle and have wheels attached.

You can also turn your Isio, into a small hedge shear.

With a few simple clicks you can remove the grass shear blades and replace them with a small hedge trimming blade!

Von Haus grass 7.2v grass trimmer shown above has been discontinued.






Grass AND shrub trimming from one tool

The Bosch ISIO can be converted from a grass shear to a small shrub trimmer in seconds and is surprisingly efficient. Running time is very good thanks to the Li-ion batteries and I get 20 minutes use which includes some woody shrub material. The battery will last between re-charges when cutting softer material.

The latest version of this tool has anti-jam electronics that stops and reverses the blades the instant resistance is detected.

This feature makes a lot of difference with the shrub attachment, especially when the battery is running low as this is when any trimmer is more likely to get stuck on a thick stem.

In fact the anti-stall technology makes this small tool better at cutting hard shrubby stems than some of its more powerful rivals!


 Bosch Isio Cordless Shrub/ Grass Shear

 Telescopic Handle for Isio

 Bosch Sprayer Attachment for Isio III Shrub & Grass Shears

Also available - Virtually useless ISIO battery powered sprayer attachment!



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Stihl HSA 25 - Tested and Reviewed by Fred

This superb tool is like the Bosch Isio on steroids!

It has a 10.8v Li-ion battery a wider blade and superb build quality.

It comes with a handy case to hold the charger and shrub trimmer blade.

A long handle and wheels is also available so you can use it from standing.

 Stihl HSA 25 Cordless Shrub & Grass Shears

 Replacement Battery for Stihl HSA 25 Cordless Shrub/Grass Shears


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Discontinued Cordless Grass Trimmers

Gtech ST05 Cordless Grass Trimmer

 Gtech launched new grass & hedge trimmers in 2008 using Li-ion technology and I tested one extensively.

The Gtech ST05 has a small blade but long handle. Initial results are very impressive as the tool is so light yet cuts very well. The 14.4v battery is built in and recharges in about 30 minutes, ( a long tea break).

The ST05 is a more advanced version of my much loved Gtech ST01 that used a separate battery that you kept on your belt.

As with its bigger brother the ST04 it has a telescopic handle, rotating head, and uses plastic blades that are great unless you want to trim up against hard objects like paths and walls.

  Plastic Blades For Gtech ST01 Trimmer - Pack of 20

The 14.4v Lithium-Ion battery is sadly built in so if it fails the whole tool is landfill


Larger Alternative from GTECH

The Gtech ST20 was launched in 2016 and uses a slide-in 18v Li-ion battery and a belt drive to make it lightweight.


Click here for more info on Gtech cordless garden tools


Spools and Blades For Discontinued Cordless Grass Trimmers


CEL 18V Cordless Grass Trimmer

This was part of a range of garden and DIY powertools that used the same Li-ion 1.2amp hour battery.

The trimmer and spools are still available.

 CEL 10" (25cm) 18V CELgarden POWERline Trimmer (Naked) LT2



Click here for more info on Gtech cordless garden tools


Wolf Cordless Trimmer

Wolf GT 845 Cordless grass trimmer with wheels - Replaced By Wolf GTA700

This used to be my favorite grass trimmer and has now been replaced with the new model . This model has an 18v  Li-ion battery the same as the Bosch model above but the wolf trimmer is 30 more expensive and its battery cannot be used in so many other products.

 WOLF-Garten GTA700 18 V Li-Ion Trimmer - Red/Yellow


Flymo Sabre Cut 24v Cordless System

This multi tool system used a powerful but heavy lead acid battery that you carried via shoulder strap.

There were 3 tools available, a hedge trimmer, grass trimmer and a blower.

They are no longer available but you can still buy line for the grass trimmer.

 Flymo Single Line Spool and Line to suit Sabre Trim and Contour Power Plus 

The latest range of Flymo trimmers are called contour.



Choosing the Best Replacement Trimmer Line

Improve your trimmer's cutting performance with an advanced design replacement line.

If you want to strim thick tough material like weeds then buy a star shaped or twisted line.

If you just trim the grass at the edges of your lawn and want a nice finish then get the thinnest, normal round profile line as this will cut cleaner and neater.

Oregon Nylium Starline Trimmer Line for Over Grown Grass and Weeds with Five Cutting Edges

Oregon Red Line  Round Trimmer Line for Low Grass and Edges



If you found this page useful and decide to buy this grass trimmer at a later date please come back and use my links as this helps keep my site going, thanks, Fred




The Wolf BS 80 metal bladed grass and shrub shear (Discontinued)


 Update - all models have been discontinued but spare parts remain available.

  Wolf-Garten 7095093 Replacement Hedge Cutter

I have a spare (new) replacement hedge trimmer blade for the Wolf BS80 if you want a bargain.

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If you found my advice helpful and would like to support my work, please return to this page and use my links when purchasing your tools.

Also any other products bought from Amazon at the same time will produce a small commission that helps cover my hosting costs.


Or - if you prefer you can make a small donation using the PayPal button below thanks, Fred



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