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Black + Decker LST300 review

The Black + Decker LST300 is a lightweight and quiet lawn trimmer and edger that is great for small gardens.

Black + Decker LST300 review
(Image: © Walmart)

Top Ten Reviews Verdict

The Black + Decker LST300 isn’t the most powerful model on the market, but it’s great for tackling hard-to-reach areas.


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    Adjustable shaft and handle

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    Good battery power

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    Long battery charge time

The Black + Decker LST300 is designed to be a two-in-one lawn trimmer and edger that can tackle hard-to-reach spots that are beyond a full-size lawn mower. The battery tends to last about 25 minutes, so it’s not the best choice for large jobs and you may want to check out our list of the best electric weed eaters (opens in new tab) if you’re looking for a more powerful option, but for small gardens or tricky spots,  a great option.

If you have other Black + Decker tools, this could also be a good option as the battery is interchangeable with a range of their other tools. If not, you may want to consider purchasing a backup battery for this weed eater.

Black + Decker LST300: Pricing and value 

The Black + Decker LST300 Electric Weed Eater is priced at just under $80, placing it in the mid-range of the electric weed eaters on our list. The extra edging features make this weed eater extra versatile, while the adjustable shaft and handle will be particularly useful for anyone who usually suffers from a sore back when trimming their lawn.

The 20-volt battery also means the Black + Decker LST300 has a good power output for a battery-powered lawn trimmer. It still won’t measure up to the power of a gas lawn trimmer, but it is lighter and easier to use than gas options. It is about double the price of the Sun Joe TRJ13STE (opens in new tab), but the quality is better and the lack of a cord makes the Black + Decker LST300 Electric Weed Eater more convenient too. 

Black + Decker LST300: Features 

The Black + Decker LST300 Trimmer is designed to be versatile and easy-to-use. It quickly and easily converts from trimmer to edger and the adjustable handle and shaft mean you can customize this weed eater for your comfort when working on your lawn. 

While the convenience of a battery-powered lawn trimmer means you forgo some of the power of a gas trimmer, the Black + Decker LST300 has been designed to get the most out of its battery power. The 20-volt battery lasts for about 25 minutes of trimming and Black and Decker has utilized its own PowerDrive transmission in order to deliver more power from the motor to the cutting string, helping you cut your lawn quicker.

Another benefit of electric weed eaters is that they’re quieter and light, and the Black + Decker LST300 is no exception. At just 5.7 lbs it’s one of the lightest electric weed eaters we’ve reviewed, only slightly heavier than the Sun Joe TRJ13STE Electric Weed Eater, which weighs in at 5 lbs. 

The string spool is quick and easy to change and the auto-feed functionality means you won’t need to keep making adjustments as you cut. The supplied string does struggle with heavier weeds, but by swapping it out for an edged string you should be able to achieve better results on stubborn overgrowth.

Black + Decker LST300 review

(Image credit: Walmart)

Black + Decker LST300: User reviews 

The Black + Decker LST300 Electric Weed Eater is a well-rated lawn trimmer with an average score of 4.2 out of 5 from users at Walmart. A few reviewers noted that they had used previous versions of this weed eater and were impressed with the battery and power improvements made with this model.

Users particularly liked that they could adjust the trimmer to suit their needs, with a few users noting that they found it easier on their back. These users were also impressed by how light this electric weed eater is. 

Negative reviews tended to want the battery life to be longer and found that spare batteries were expensive. A few noted that they felt the trimmer would be able to handle tough weeds better if it had a double line feed.

Should you buy the Black + Decker LST300? 

The Black + Decker LST300 Electric Weed Eater is a great option for anyone wanting a versatile trimmer that’s easy-to-use without splashing too much cash. It’s not the best option for heavy weeds, for that the more powerful Greenworks 21142 (opens in new tab) could be a great option. 

If you’re on the lookout for a lightweight budget option, then the Sun Joe TRJ13STE Electric Weed Eater could be a great choice for you as it’s even lighter and half the price, but it does have the inconvenience of being a corded model.

Stevie is a freelance digital consultant, copywriter and photographer. She's worked for brands like the Radio Times and Wallpaper*, and has also written for Amateur Photographer, Clash Magazine and Flash Pack, amongst others. Stevie's bylines cover all things related to the home - from air conditioning units to refrigerators to gas grills (and everything in between).