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BLACK+DECKER 20V MAX String Trimmer, 2-Speed, 12-Inch, Cordless (LST522)

4.5 4.5 out of 5 stars 6,081 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in String Trimmers by BLACK+DECKER

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20V String Trimmer Kit

Purchase options and add-ons

Brand BLACK+DECKER
Power Source Battery Powered
Color black
Item Weight 5.7 Pounds
Cutting Width 12 Inches

About this item

  • Automatic Feed Spool (AFS) feeds edger/ trimmer line as needed - without bumping..Watt Hours:50.
  • LBXR2520 battery provides cordless grass trimmer 66% more battery capacity for longer runtime compared to LBXR20
  • 2-speed control lets you boost power or extend runtime of the lawn trimmer.
  • PowerDrive Transmission increases torque for more cutting power at the string.
  • Easily converts from trimmer to wheeled edger.
  • Adjustable height and handle with premium soft grip improves comfort and control.
  • Part of the 20V MAX System - 1 System. Endless Tasks. Power for your Style.
  • Maximum initial battery voltage (measured without a workload) is 20. Nominal voltage is 18V.

Customer ratings by feature

Light weight
4.5 4.5
Maneuverability
4.5 4.5
Battery life
4.1 4.1

Frequently bought together

$84.62
Get it as soon as Monday, Apr 1
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BLACK+DECKER 20V MAX String Trimmer, 2-Speed, 12-Inch, Cordless (LST522)
BLACK+DECKER 20V MAX String Trimmer, 2-Speed, 12-Inch, Cordless (LST522)
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BLACK+DECKER 20V MAX Cordless String Trimmer, 2 in 1 Trimmer and Edger, 12 Inch, Battery Included (LST300)
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Price-22% $84.62
List:$109.00
$89.99-13% $122.00
List:$139.99
-17% $99.00
List:$119.00
$82.39-23% $76.88
List:$99.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Wednesday, Apr 3
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Light weight
4.5
4.4
4.5
4.4
4.6
4.6
Maneuverability
4.5
4.1
4.4
4.3
4.6
4.6
Battery life
4.1
3.9
4.1
3.6
4.3
3.9
Easy to use
4.1
4.4
4.5
Sold By
Amazon.com
MAXLANDER
Amazon.com
Amazon.com
Amazon.com
Amazon.com
power source
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Battery Powered
cutting width
12 inches
12 inches
12 inches
13 inches
1300 inches
12 inches
voltage
20 volts
40 volts
20 volts
assembly required
weight
5.7 pounds
6 pounds
6.3 pounds
5.7 pounds

From the manufacturer

BLACK+DECKER 20V MAX* 12 in. Cordless String Trimmer/Edger with POWERDRIVE (LST522)

BLACK+DECKER 20V MAX* 12 in. Cordless String Trimmer/Edger  with POWERDRIVE (LST522)

Designed with your convenience in mind, this cordless string trimmer easily converts into an edger, while the AFS AUTOMATIC FEED SPOOL lets you keep working without bumping. With a 2-speed control function, you can adjust the power output to suit the task, and the POWERDRIVE transmission enhances the string power and cutting action, even when faced with tough-to-manage weeds and grasses.

Features and Benefits of the BLACK+DECKER 20V MAX* 12 in. Cordless String Trimmer/Edger with POWERDRIVE

2in1 design

AFS AUTOMATIC FEED SPOOL

2-speed control

POWERDRIVE transmission

2in1 design

Easily converts for use as a cordless trimmer or wheeled edge trimmer, so you can maintain side-walks, driveway edges, decks, and walkways.

AFS AUTOMATIC FEED SPOOL

Eliminates constant stopping and starting while trimming by smoothly feeding trimmer line with no bumping required.

2-speed control

Lets you boost power or increase runtime. Choose the lower speed for jobs that require more time and the higher speed for jobs that need added power.

POWERDRIVE transmission

For ultra-powerful torque and cutting action. Cover more ground in less time.

Long-lasting battery power

Long-lasting battery power

LBXR2520 20V MAX* lithium ion battery provides 66% more battery capacity for an extended runtime (compared to LBXR20).

20V MAX* POWERCONNECT Battery System - Interchangeable Cordless Battery

20V MAX* PowerConnect Battery System - Interchangeable Cordless Battery

The 20V MAX* POWERCONNECT BATTERY SYSTEM is an interchangeable battery system. You can use one battery for multiple different tools within the BLACK+DECKER family of products.

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Product information

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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BLACK+DECKER

BLACK+DECKER 20V MAX String Trimmer, 2-Speed, 12-Inch, Cordless (LST522)


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Product guides and documents

Product Description

Get the power you need with this two-speed trimmer/edge trimmer with extended battery capacity. Power through tough overgrowth, or reduce speed while you edge for extra runtime. Either way, there's no bumping required thanks to the Automatic Feed Spool of BLACK+DECKER trimmer.

Customer reviews

4.5 out of 5 stars
4.5 out of 5
6,081 global ratings

Customers say

Customers like the performance, quality and weight of the string trimmer. For example, they mention that it does the job pretty well, is easy to assemble and that the user manual has really easy-to-follow directions. That said, opinions are mixed on battery life and size.

AI-generated from the text of customer reviews

410 customers mention311 positive99 negative

Customers like the performance of the string trimmer. They say it does the job pretty well, works well for light work, and the filled cartridge it came with worked like a charm. The motor still works perfectly, and it works great for edging as well. The wheel in the front really works well, and is very powerful.

"...gave it to a handy friend who planned to repair it as the motor still worked perfectly...." Read more

"...The wheel in the front really works well." Read more

"This trimmer is a BEAST! It has plenty of power for cutting through thick weeds and lawn grasses...." Read more

"...battery life (30-45 mins, depending on the power setting) and limited power (I prefer the high power setting for thick grass)...." Read more

336 customers mention238 positive98 negative

Customers like the quality of the string trimmer. They mention it's a great product, light weight but powerful, and good for cutting grass in small areas. The strength of the trimmer is adequate on high power. It's easy to maneuver, and robustly constructed of sturdy materials. It is perfect for a little yard work around the house, and it cuts super close.

"...It is robustly constructed of sturdy materials In summary, a much deserved 5-star rating from a highly satisfied user!" Read more

"...But it's no problem to "mow" it with this trimmer, which is sturdy but light, and the battery life is wonderful. Two speeds? #..." Read more

"...After about 8 years, the string release mechanism gave out on our first one so we gave it to a handy friend who planned to repair it as the motor..." Read more

"Easy to maneuver, good quality and battery life, great value for the money" Read more

268 customers mention268 positive0 negative

Customers like the weight of the string trimmer. They say it is very light, easy to maneuver, and efficient. They also mention that the balance of weight is pretty good, and the strength of the trimmer is adequate.

"...I love that this is lightweight, yet strong enough to accomplish the needs of out yard: edging, some natural area weed whacking, and cutting back..." Read more

"...has all the upsides and downsides you might expect: it's small, lightweight, and convenient, but has limited battery life..." Read more

"...It’s also much lighter than my other trimmer…very easy on the upper body...." Read more

"...But it's no problem to "mow" it with this trimmer, which is sturdy but light, and the battery life is wonderful. Two speeds? #..." Read more

244 customers mention230 positive14 negative

Customers find the string trimmer easy to assemble. They mention it's lightweight, easy to handle, and has an excellent user manual with easy-to-follow directions and diagrams. They also say it'll be convenient to use around the yard, and mention it can be used as a trimmer and edger. Customers also appreciate the easy attachment of the guard and the simple installation of the protective guard.

"...upsides and downsides you might expect: it's small, lightweight, and convenient, but has limited battery life..." Read more

"...It’s also much lighter than my other trimmer…very easy on the upper body...." Read more

"Easy to use. Works well" Read more

"Easy to maneuver, good quality and battery life, great value for the money" Read more

111 customers mention96 positive15 negative

Customers like the value of the string trimmer. They say it's a good affordable choice for residential applications, and a decent line trimmer for the price. Overall, customers find it to be a very good option for most.

"...but it did an admirable job considering it's battery-powered and affordable...." Read more

"Easy to maneuver, good quality and battery life, great value for the money" Read more

"...but I am happy with this purchase because of the low price." Read more

"Overall, it is a decent line trimmer for the price. The rechargeable battery will give you about 20 good minutes before starting to die down...." Read more

62 customers mention56 positive6 negative

Customers find the string trimmer versatile. They say it's an excellent tool, perfect for edging, and practical. They also say it has good features and is handy for small jobs.

"...On the plus side, this trimmer is very handy for small jobs between major trims, and with that proviso it's a good product...." Read more

"...It cuts super close and really well and the edger is just an added bonus. I was surprised how well the edger worked!" Read more

"...no complicated engine requiring regular maintenance, even converts to an edger; what's not to like, right?..." Read more

"...As per usual, excellent user manual with really easy-to-follow directions and diagrams...." Read more

371 customers mention227 positive144 negative

Customers are mixed about the battery life of the string trimmer. Some mention that it's wonderful, holds charge to do a medium size yard, and has lots of power left. However, others say that it has limited battery life and the 20V batteries that come with it don't last too long.

"...with no need to recharge the battery...." Read more

"...I wish the battery lasted a little longer, but I believe that there are more expensive models with longer battery life." Read more

"..." it with this trimmer, which is sturdy but light, and the battery life is wonderful. Two speeds? #..." Read more

"Easy to maneuver, good quality and battery life, great value for the money" Read more

68 customers mention45 positive23 negative

Customers are mixed about the size of the string trimmer. Some mention that it's very nice for small/medium and even large job if you have the batteries. The size isn't too cumbersome and it'll be easy to use even for a petite person. However, others say that it could be about a foot longer which saves much strain on the handle. The weedeater overall is a little short and the line will get too short.

"...trimmer has all the upsides and downsides you might expect: it's small, lightweight, and convenient, but has limited battery life..." Read more

"...I like the fact that it is cordless and the battery size is not overly large, so it is easy to handle...." Read more

"...and it has a bent handle which is awkward and it’s large around so my hand was cramping quickly. The older design was sooo much better...." Read more

"...It’s lightweight and stores in our tiny shed easily, and with a lawn-mower base attachment that came with our last model..." Read more

Short,awkward,works
4 Stars
Short,awkward,works
This B&D weed trimmer works and would be fine for a small person with a small yard. I’ve owned my 20volt B&D weed eater for many years and I’ve loved it. I own 4working batteries. When mine locked up I decided to get this one and I can use the batteries I already own too. The picture shows the difference. The new one doesn’t extend tall enough (hurt my back and shoulders after 10 feet)and it has a bent handle which is awkward and it’s large around so my hand was cramping quickly. The older design was sooo much better. The new one is a smidge lighter. But I would say the new one feels more cheaply made. On “2”(the stronger setting) I have to go over the area several times to get a good cut down. The old B&D did a far better job quicker. I am returning this model for the other 20 volt model. Hopefully that one is set up a bit better for me. Good luck
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Top reviews from the United States

Reviewed in the United States on November 1, 2023
Style: 20V String Trimmer KitVerified Purchase
2 people found this helpful
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Reviewed in the United States on December 29, 2023
Style: 20V String Trimmer KitVerified Purchase
Reviewed in the United States on September 23, 2021
Style: 20V String Trimmer KitVerified Purchase
Reviewed in the United States on August 31, 2023
Style: 20V String Trimmer KitVerified Purchase
5 people found this helpful
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Reviewed in the United States on August 7, 2022
Style: 20V String Trimmer KitVerified Purchase
12 people found this helpful
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Reviewed in the United States on July 19, 2023
Style: 20V String Trimmer KitVerified Purchase
6 people found this helpful
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Reviewed in the United States on January 10, 2024
Style: 20V String Trimmer KitVerified Purchase
Reviewed in the United States on November 18, 2023
Style: 20V String Trimmer KitVerified Purchase

Top reviews from other countries

Lynn Murray
5.0 out of 5 stars Love it!!
Reviewed in Canada on June 23, 2023
Style: 20V String Trimmer KitVerified Purchase
3 people found this helpful
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Amazon Customer
4.0 out of 5 stars Nice and light, easy to use
Reviewed in Canada on July 6, 2023
Style: 20V String Trimmer KitVerified Purchase
4 people found this helpful
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Camera tester mama
5.0 out of 5 stars Lightweight quiet and long battery life
Reviewed in Canada on July 7, 2022
Style: 20V String Trimmer KitVerified Purchase
3 people found this helpful
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Kate
4.0 out of 5 stars Inter-changeable battery bonus, but takes a long time to charge
Reviewed in Canada on June 13, 2018
Style: 20V String Trimmer KitVerified Purchase
23 people found this helpful
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Judy M. Hornbrook
5.0 out of 5 stars Safe, efficient and couldn't garden without it!
Reviewed in Canada on July 12, 2021
Style: 20V String Trimmer KitVerified Purchase
2 people found this helpful
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