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Black & Decker LST136 Electric String Trimmer 13″

Reviewed By: Mark Rafferty
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When you think of electric powered gardening tools the orange hue of Black & Decker might pop into your mind. They’ve been a leader for many moons. In this instance this is one of their best and most high quality models of electric grass trimmer you can buy, and also a leader out of all manufacturers. The LST136 will quickly and easily go from in the box to cutting and trimming away at areas of overgrowth or borders and flowerbeds. The precision is great and can be furthered due to the ability to convert the trimmer to edger. You have a PowerCommand feature to allow for more runtime or more power and this is easily charged because it has fast charger technology included. Meaning you won’t have long to wait between uses. You can cut up to 13″ swath and going the distance is easier due to the line advancing on its own as you go, so no need to stop and bump. It has a great customer review selection and here some have complained that the battery burned out or that it doesn’t last long enough. To counteract this you could easily have two batteries to get more from each venture.

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  • Top of the range strimmer
  • 36v battery with low and high power settings
  • Strong cutting
  • Light and easy to manuver
  • Telescopic handle for easier storage
  • 1 battery included


  • Black & Decker’s electric lawn and garden equipment releases zero emissions in your yard
  • 40V lithium battery with built in state of charge
  • Power Command – Choose Max Power or Max Runtime
  • PowerDrive Transmission™
  • Automatic Feed Spool™
  • Fast charger included standard
  • Easily converts from trimmer to edger. tool free handle and height adjutment

Customer Reviews

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How to Choose a Battery Powered Cordless Grass String Trimmer

Cordless battery powered sting trimmers are a popular choice for their quiet operation, low carbon emissions ease of use and negating the need to fill with gas plus more. What is it that you need to look out for when choosing the one for your needs?

Battery & Power

Usual battery runtime for a cordless grass strimmer is between 40 to 50 minutes. Depending on the type of battery (lithium-ion being most preferred for its fast charging, long lasting and long life cycle features), will depend on what usage time and power you get. Other things to look out for are the volts and amps so you can tell how powerful the trimmer might be.


There aren't many brands that make battery powered grass trimmers which makes it quite easy to make a decision. There are some more reputable and supportive brands than others. Researching the brand before purchase could be a good idea.


If you want a trimmer to last very long then battery powered might not be for you. Decide what your usage needs are and match the features to this. For example, some trimmers double up as edgers or have extending handles. What features do you need to get the job done?

Automatic or Manual Line Feed

When feeding the line while trimming do you want it to be automatic or manual? Manual is usually the stop and bump method and automatic there is no need. There is also trimmers with dual capability. Some people will prefer automatic but some complain it can get awkward when enough line doesn't feed. Be aware of this.

Size, Ergonomics & Weight

As you will be using the trimmer for lengthy periods of time you comfort is important . If the trimmer doesn't have a comfort grip handle will your hands suffer? Or if it is heavy, will you be able to carry it for the amount of time you need?  


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