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Black and Decker LST420 20-volt Max Lithium High Performance Trimmer and Edger, 12-Inch - Black & Decker
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Black & Decker GH900 14-Inch String Trimmer and Edger, 6.5 Amp - Black & Decker

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Black and Decker LST420 20-volt Max Lithium High Performance Trimmer and Edger, 12-Inch - Black & Decker
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Black & Decker GH900 14-Inch String Trimmer and Edger, 6.5 Amp - Black & Decker
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eComparisons Score
eComparisons ScoreThe "Comparison Score" Is calculated based on the average number of times this item was compared with other items in this category by our users
8.8
8
User Rating (Amazon)
User Rating (Amazon)

Five Star Reviews:

66%
Great trimmer.
August 20, 2017
Since my being sidelined by emphysema, my dear wife has managed to keep up with the lawn. In searching for a lighter and more manageable trimmer, I stumbled across this one, and ordered it. We are extremely pleased with it. Very light and easy to manipulate, and the battery exhibits the longevity between charges typical of Li-ion type .... just what was wanted. I was fearful that this battery was too small, but it regularly lasts for several full trimmings around the lawn, and thus stands out for excellence. Our application involves edging grass only, which is nonetheless a tough assignment. My wife easily manages the machine, and easily operates the battery charger, which is small and offers no clutter (unlike most, which need a room of their own, or so it seems...).
AMAZING weedeater.
July 28, 2016
I'm not an outdoorsy guy. I hate doing lawn work. And I have a large yard with tons of trees. I've heard other men have conversations about their weed eaters and the troubles they've had. Multiple trips to Lowes Hardware to get or replace them. I never mention I use an electric weedeater. I feel like my man card would be revoked.HOWEVER, this thing is GREAT. It comes with two batteries so you always have on charged. And provided it's for personal use, you'll get weeks worth off one battery. Never have I come anywhere near close to going through both batteries in one day. It's strong enough that it can tackle anything you throw at it, and it just starts. No pulling a cord. No putting in gas. Just grab it, hit the button, and it's on and working.Again, if you run a lawn service company, you probably don't want this. If you're just a normal guy with a normal yard, buy this. And tell people, please, only if we stand together can we all admit to using electric tools. :)
Solid, easy-to-use trimmer
June 1, 2016
Have had this trimmer for about 6 months. Works great for my corner lot with lots of sidewalks, curbing, etc. Professional-looking results. Battery easily lasts for an all-yard trimming session. Easy to rotate head for either edging or trimming as needed on the fly. Easy to replace string spool, although it seems to go through string pretty fast. So much easier than dealing with a cord and ample power for moderate trimming and edging tasks.
Black & Decker LST 400 exceeds my expectations
June 16, 2014
I've used this trimmer twice. Pro: This last time I finished my big double size yard that has lots of tough weeds and tall grasses growing where they shouldn't and it did a marvelous job, as much cutting power as a gasoline unit. I found 2 Cons: One, it's heavier with this bigger battery, harder on my bad back...however the trade off is the battery power stayed strong thru the entire trimming job, a couple of hours ! Never showed any weakness until maybe the last few minutes. Other Con is: It's REALLY hard to put the battery into the trimmer. Takes almost more strength than my beat up old hands can muster up. I've almost given up a couple of times and finally got it to click into place. The battery fits into the charger just fine, and charges fully in a few hours. So not sure why it's so hard to fit it into the trimmer. I had to remove the string spool a couple of times and fix it, as for some reason it must not have been wound properly to begin with. But it does seem to advance ok. It's a keeper...I like it for it's power...but it's a painful ordeal for me to get the battery into it. This is my second battery power trimmer....the first El-cheapo lasted 5 yrs. I hope this one will last as long as I'm needing it anyway...I'm old, who knows how long that will be ? (72+ female)
Awesome!
June 1, 2014
I own 8 acres. Three I maintain and landscape, the other 5 are woods. When I mentioned getting one of these everyone I spoke with said battery weed eaters are horrible. NOT true! On the two litium batteries, I can weedeat the entire landscaped property without the pain of mixing oil and gas for fuel, fighting with the pull start and lugging all that weight around. If this can take care of my property I'm sure it can handle others!
Good power
May 12, 2014
So far I don't have any issues. Easy to take out of the box and start using. The batteries were even charged up. Light weight to use. Easy battery to change out. And with trimming around my house, my pond (15 ft in dia.) and our flower beds, it seems one battery is enough. About 30 minutes.
52%
Black & Decker has yet to disappoint!
April 17, 2016
I bought this to replace an older B&D trimmer that had been handed down to me and finally saw its day. The old one worked great and this one is even BETTER.It arrived early on the day it was promised, so kudos to the seller's shipping team.Attach the handle and guard and that's it, you're ready to go.I gave it a quick test and was impressed even with the trigger.The wheel is a nice touch, my old machine didn't have one and definitely makes it a little easier to do the edging.*** I purchased this item at a discounted price in return for an honest and unbiased review***
this was perfect and I haven't had any problems with it at ...
April 13, 2016
I had an older version of this and needed to replace it, this was perfect and I haven't had any problems with it at all. I rethread the line myself, as that's cheaper than buying the spools, and I can not be happier with how easy that is. I had many problems with my old one and debated buying another black and decker--but this did not disappoint!
Edited: Garbage
July 12, 2015
This thing has power! My last electric trimmer gave out after less than a year which was annoying and disappointing. I decided to try trusted B&D and as always, they did not disappoint.Edited: I've had this less than 2 months and used less than 3 times and the plastic piece that hold the spool n in place literally melted :/
Black & Decker GH900 Outperforms Other String Trimmers
May 11, 2015
This Black & Decker GH900 corded string trimmer outperforms other trimmers. How do I know that? I purchased four other competitors and compared them. My review and story is below:Last summer, I purchased a B&D GH900 and it performed flawlessly. The automatic line feed system worked brilliantly. Also, this model has only one line, which I prefer. The dual feed line trimmers are difficult to load and unnecessary because of the GH900's high motor RPM speed. Anyway, after using it few months last season, the GH900 developed a problem. The motor would labor and not get up to high speed, so I decided to replace it with a competing brand. That was a mistake.Over the past month this spring I purchased three more corded string trimmers from different manufacturers and they all failed miserably. Most notably was the automatic feed system. None of them worked properly. Even another model from Black & Decker.I read another review where the person gave it a low rating because it only has one trimmer line instead of dual trimmer lines. I give this B&D GH900 five stars because it only has one. The GH900 has incredibly motor RPM rate and dual feed is not necessary. Besides, when you have a jam in the trimmer head out in the field, you can quickly disassemble and re-feed the single line quickly even while wearing gloves. With a dual feed, you have to return to your garage and perform the complicated task of re-stringing it. That's a real pain.In my opinion and from experience, this Black & Decker GH900 auto feed single line trimmer is my choice. It's made of quality materials, has a telescoping shaft for comfortable use by every height user (I'm 6' 5" tall). It's light weight, but most of all the automatic single line feed system works perfectly. I highly recommend purchasing this Black & Decker GH900 string trimmer. I purchased another one and glad that I did.
Trimming is finally easy
May 7, 2015
My old Black and Decker trimmer finally gave out after 6 years. I was very bummed as I had come to know exactly how to use to squeeze in tight place and around plants without whacking the string off or cutting the plants. So, I decided to check out another Black and Decker trimmer that was environmentally friendly and easy to use.After reading some of the reviews, I was afraid this Black & Decker GH900 wouldn't be tall enough for me (I'm 5'11). However, I found the height to be great and I love that you can adjust it to your needs.The other thing I was concerned about was the plant/string issue. However, with the guard, I don't have to worry about chopping up my aloe or other ground plants. It snips right to the edges and cleans up perfectly. I feel the same with the edger (which I have never had a wheel and guard). It's easy to use and I don't have to worry about hitting my pavement.All in all, the Black & Decker GH900 doesn't disappoint at all.
Amazing machine for less than $50!
June 25, 2014
I am 5'2" and am 50+ years old. My husband has a large and heavy gas powered trimmer that he and my sons use but I wanted one that I could use. I decided to buy locally but wanted to do a review here because this is where I started my search. I ended up with this Trimmer for a couple of reasons-reviews, price and accessibility locally. First let me say-LOVE IT! You have to snap 2 pieces on-the 2 black pieces you can see in the photo which takes a mere 2 minutes and you are literally good to go. We have 4 acres and I thought I would just do around the house but this machine is so amazing I couldn't stop! There is that instant gratification you get with a machine like this and well I just kept going. I won't say I have done the whole 4 acres but if I could put enough electric cords together I could absolutely do it all. It is very easy to operate, lightweight enough for me and the shaft can be shortened or lengthened so my sons and husband can use it too. I like it because I just pick it up and go while my son was mixing oil/gas and pulling on the cord to get his going! I was able to get through some areas of the lawn that let's just say were "overlooked" by my boys so they were pretty overgrown-tall and dense and no problem at all. I am using the spool that it comes with and I would say I have used this for a couple of hours each of the last 2 days. Another plus-a good workout for your arms! Even though it is lightweight and easy to use holding a machine you don't normally hold for hours will make your muscles sore! I thought this would be our back-up trimmer but everyone really liked it so I am saying this is going to the front of the line for use around the house and the gas powered for further out on the property. I just wish I had purchased this a long time ago.

Four Star Reviews:

20%
Good amd verstile
August 23, 2017
This trimmer is perfect for light duty yards. There is plenty of battery power, and two batteries is enough to complete all the trimming and edging on my corner lot. The feel is very solid, yet light weight.Cons: the biggest con is the edging power when it comes to edging. It does the job but takes long time. I wouldn't get it if you have a lot of edging to do. The trimming line is a bit thin so edging thick grass, like St. Austine, will shred through quite a bit of line. The second downside is the length of the stick. I'm 6 foot and I have to lean over a bit to do a lot of edging. After 10 minutes my shoulders start to hurt and I need to stretch.Otherwise I like the product.
Good trimmer - recommended if you have other B+D 20V products
April 29, 2017
I have other 20V Black+Decker products and this one works pretty well. My only gripe is that it is a single string trimmer, for some grass runners it takes multiple passes to cut completely when edging. After about the year, the screws that connects the long shaft in the middle got loose - easy fix. I recommend buying a spare spool so you have it handy if you run out during usage. The battery is quite good, I can generally do all by trimming and edging with one battery. However, you should have a spare just in case. I also have other B+D 20V products (hedge trimmer, blower, pole saw) and the batteries are all compatible. I made the jump to cordless equipment a few years back and have not looked back. I highly recommend this product and would have given it 5 stars if it was a double string trimmer.
Plenty of power, gets the job done
September 12, 2016
NIce weed eater and was really impressed by the edger. Automatic feeding of spool worked great and after 6+ uses on a large snigle family yard (and a corner lot) I still have plenty wire left.Battery (and two is even better) is great because you can swap them out quickly if needed and they wok on all the other 20v tools black and decker makes. This saves you 20-30 dollars each time you order another product from this line. I've noticed the battery is strong enough to last about 15 continual minutes with any one of their tools.The battery takes a long time to charge to get those 15 minutes of action. Several hours in fact, so plan accordingly.
nice lightweight trimmer
June 21, 2016
Light weight and easy to use. The guide wheel is great for edging a walk or fence as it prevents the string from cutting into the fencing. I have a small lawn, but a decent amount of walkways and fence line and was able to use the same battery charge for two separate trimmings. Only knock is that this product lacks power for tough/thick grasses, even using the extra power 2 setting; the string and battery/motor just aren't strong enough. However, makes quick and easy work of light-to-medium tasks.July 2017 Update:So I've been using this trimmer for the better part of 2 mowing seasons and I highly recommend it! As noted previously, each battery charge lasts for more than 2 yard trimmings. I'm also still on my original spool of string (though I recently ordered replacements, from Amazon, of course). I only have a fifth of an acre lot, but have fencing on 2 sides, driveway, walks, and a fair amount of garden edging. This edger easily handles residential trimming chores and is by far the lightest, most comfortable string trimmer I've owned! I really appreciate the guide wheel for edging walks and fences -- it's a must-have feature for now on. I won't being going back to a gas powered model with their numerous drawbacks -- mixing gas/oil, jerky pull start, choke adjustment, smell, noise, and the occasional muffler burn.
Long lasting and wireless too.
June 16, 2015
We have a 3/4 acre lot with 23 flower beds, a veggie garden and numerous fruit and ornamental trees to edge and trim. I bought this to get rid of the power cable hassle of getting around everything, switching outlets etc. It was the same reason we bought a 20v B&D hedge trimmer. It has worked out very well. About 80% of the trimming and edging was done on a single charge at low setting. The other 20% was finished with a battery from the hedge trimmer. We now keep up with the task instead of putting it off because of the hassle. We also have a B&D 20v drill. With all 4 of the batteries being inter changeable, we can trim our 30 hemlocks in one day instead of dragging it out. I hope it lasts as long as the hedge trimmer.
Impressive
September 20, 2014
Pretty impressive performance from this lithium powered trimmer. Assembly was quick and easy and I was out the door giving it a trial run with one of my LBXR20 lithium batteries from my Black & Decker hedge trimmer or blower.The device was used primarily on the extended run-time setting which gave more than enough opportunity to clear the concrete walk, two driveways and some weedy overgrowth on the front and back yards. I still had power left on the battery when I was done and put it back in the charger after somewhere in the 20 to 30 minute range. (I didn't wear a watch so I can't be precise.) If I got this much from the less powerful battery, I'm sure I'll be impressed with the run-time of the supplied double power battery.As far as I could tell, the feeder and line both did their job admirably but since I don't know how to judge how much time or work I'll get out of the original spool I went ahead last night and ordered up a two pack of replacements for future use.All in all I must say that I have been very impressed with the three B&D products I have from this line...string trimmer, blower / sweeper and hedge trimmer.At some point I may consider the quick charger but am not having any issues with the supplied chargers as I usually have a spare battery ready to go.
19%
Good trimmer, mine had a defective switch but was able to repair it. If you don't mind dragging a power cord go for it.
June 9, 2017
Works well, mine was slightly defective, and the switch failed very early in it's use. Fortunately it uses the same switch at the trigger as for changing modes via rotation of the trimmer head. I literally have no idea what the other switch does? Maybe it was for limiting string output during the other mode, but I switched the two switches and it has been working fine for 2 seasons. I'm on my second spool of trimmer line so havn't used it too much but any way pretty reliable. Works every time you plug it in if you can stand dragging out the cord every time...
Precision cutting and powerful. The handle needs a more durable locking mechanism, keeps slipping.
May 12, 2017
Have used it twice to trim the grass and weeds around the house. It cuts very well as intended. Has plenty of power to get through any thick grass with ease. The only down side is the handle. No matter what position I lock the handle in, after several minutes of use it will slip out of the locked position and rotated all the way up. May have to use duck tape to lock it in place. Overall, it cuts with precision and ease.
It's a cinch.
June 26, 2016
After wasting too much time and money on gas trimmers from 3 different manufacturers that were heavy as hell, a PITA to start, and maybe lasted three times before they died ignoble deaths, I gave this electric trimmer a shot. It's light, you pull the trigger, and it whacks like crazy. I had this 6' tall marsh grass growing in the backyard in some dense clumps and this thing took care of it. Even some woody vines were chewed up nicely. Stuff much thicker than a pencil stymied it, but what did you expect? A chain saw?The initial spool of mono that comes with it is pretty skimpy, and the replacement spools weren't cheap. But they do drop in and go, a total cinch. What's your time worth? At least you have the option to rewind spools, but I hardy see myself bothering. The mono is good quality as the replacement spool took out the majority of the marsh grass and there's still about 2/3 of the roll left. Haven't had use for the edger, so I can't comment on that.And yes, dragging around a cord kind of sucks. But considering the price and the performance of the trimmer, I found that a little intelligent planning makes cord management not too dreary. Definitely a 4 star product for what it was designed to do.
Much better than the two string models that are overly complicated ...
March 29, 2016
Much better than the two string models that are overly complicated to keep the feed mechanism going. I did have to rewind the string it came with, but after that it worked like a charm.
THIS IS TO REPLACE ONE THAT I DESTROYED THROUGH ABUSE ON MY PART
September 17, 2015
GREAT FOR SMALL YARDSbought this as a replacement for one that came with my Black & Decker MTE912 12-Inch Electric 3-in-1 Trimmer/Edger and Mower, it was a perfect fit after 1 modification i had to use the smaller guard from my old trimmer .i used the living daylights out of the old one and i was very pleased with it so i had to replace it. this is the perfect replacement
Great trimmer for a great price
April 7, 2014
I've only used it once so far, but I can honestly say I'm very happy with my choice. It was the first mow of the season so the lawn was a bit scraggly and overgrown, so it was a good test of performance. I removed the edging wheel because I have a separate B&D edger for that purpose and I figured why not reduce some weight. The trimming power is perfect and since I mainly use it along my fence I wouldn't want it to be any stronger because this one easily has enough power to damage the 8 year old wood fence if I'm not careful.I previously owned a Black & Decker 18 volt battery powered GrassHog. That particular trimmer was great, but after 3 years those batteries barely hold a charge and the replacement cost at $40+/each is quite high. I'm hoping I get a longer lifespan out of this corded version.[UPDATE July 1st, 2014]I've been using the trimmer for a few months and I'm happy to report that I'm still very satisfied.[UPDATE April 9th, 2015]Some good and bad news to report... The trimmer seized up on me during the first mow of this season, but thankfully B&D has a 2 year warranty on it. I brought it to my local B&D service center and was told that it does not have any serviceable parts, so they sent me a brand new replacement unit.

Three Star Reviews:

6%
There is a lot to like about this product
July 11, 2017
There is a lot to like about this product. It is light weight, powerful and it seems that getting two batteries along with the trimmer really makes it a good deal. It has one fault in my opinion, the trigger/handle is much to hard to pull. There is no way to lock the trimmer in on, so you have to keep the handle squeezed quite tightly. I'm not a little guy, but I find that after using the trimmer for 10 or 15 minutes my forearm gets quite cramped. Perhaps the trimmer I received has a abnormally strong spring. I use a velcro strap to hold the trigger handle down which is certainly a safety hazzard, but it is the only way to use the product for a long period of time.
Convenient Trimmer with a Frustrating Grip for Edger Mode
June 4, 2017
This Trimmer/ Edger is a great overall product with several flaws. The battery is long lasting (I typically use mine for 30 to 45 minutes with no issues). It also comes with two batteries which helpful for larger yards and projects. The main benefit of this trimmer is that it is light. The weight makes yard projects easy to complete without fatigue.My main complaint is that the hand grip is height adjustable but does not adjust around the trimmer. When in edger mode, the hand grip requires an awkward arm positioning which is fatiguing. The ability to twist the hand grip would fix this issue.
Very happy with the 2nd battery after the first one was defective.
August 13, 2015
I had a Black & Decker rechargeable trimmer about 13 years ago and I was very impressed. I then used a lawn cutting service for several years before going back to do my own lawn again this summer. I was excited to see a more powerful and lighter (lithium) battery so I bought this trimmer. Unfortunately, my first one only lasted about 1 month before the battery would give out every few minutes. I decided to give it another chance and replaced the first one and it has been running great for 2 months now. It's more powerful than I expected and it's fine for basic yard work. I wouldn't recommend it for heavy brush but for grass and weeds that grow against a fence or basic edging, it works very well, is light, and the string lasts a long time. I run it for approximately 15-20 minutes on its high setting with no problems.My 3 stars is due to the first battery being defective but I would have given it 4 if that did not happen.
OK if not having to feed line is more important than power
July 9, 2015
Forget using the low setting to cut anything. There is a speed control you should forget 1 and use 2. When I first got it I was so disappointed. It would not cut anything. On 2 I haven't found it as powerful as a cheap electric. That said I didn't send it back and I do use it. If you use it on the maximum setting it is still not going to cut what an electric one will, but you don't have to pull out cords. It is nice for that reason and it is nice that you don't have to keep tearing it apart to get the line to feed.Just feeding line automatically is why I didn't give up on it. It came with 2 batteries. I'm a senior citizen and my yard is small. I hate having to store 2 batteries and I work 30 minutes and quit. One battery on the highest power works OK for me. If you are OK with that then it works fine as long as you aren't trying to cut big stuff.
There's a wheel to assist in edging which is nice. This thing is the lightest trimmer I've used ...
May 12, 2015
The batteries last me through the job unlike my previous trimmer with Ni-cad batteries. Even on the highest speed setting this thing doesn't have quite enough oomph though in thick grass. There's a wheel to assist in edging which is nice. This thing is the lightest trimmer I've used to date, but I have to switch it back and forth between hands because the trigger needs so much force to hold in.
but for small yards or light weed eating it works fine, I can complete my entire yard on one ...
April 30, 2015
I bought it because I have a small yard and my gas weed eaters are older and hard to start not to mention heavy, if you have a larger yard or heavy weed eating to do then DO NOT buy this, but for small yards or light weed eating it works fine, I can complete my entire yard on one charge, I also have other tools with the same battery so even if it runs out I have an extra.. Oh I would not use for edging, I have a black and decker edger and it is worth dragging the extension cord for that. I am not sure about the auto feed, it doesn't always work properly but works well enough for me. I gave it three stars because it suits my needs nicely but does take a bit to cut through tough weeds and would not want to use it for large jobs or heavy weed eating or edging, doesn't have the power for that.
9%
Meh
August 19, 2017
Not a huge fan. I didn't realize this was an electric weed eater, but that wasn't a deal breaker. used it once and it went through an entire spool of string. I didn't know that until the 2nd time I went to use it (of course). It has an auto feeding string, which I much prefer the manual feeders. I also looked forward to the rolling trim feature. It was ok at best. I'll give it another shot when I get some more line, but I'm not real optimistic that I'll love this ever.I recommend getting one with a manual string feeder.. or a traditional gas one. walking around the yard with an extension cable is about as fun as it sounds.
Just OK.
July 21, 2017
I've used several trimmers over the years, this one isn't my favorite, but it gets the job done.-1 star for the auto-feed design. It well let out a bunch of line if the line is wrapping around something, like a pole. When I'm not careful, that long line, when cut, will whip me right in the ankle -- not fun if you're not wearing long pants.-1 star for handle slippage. The handle is adjustable but has the tendency to slip out of place once or twice during each use requiring me to break my stride to fix it.The wheel is a two edged sword -- great for edging, but bad for getting into really tight spaces.
Meh. Spend a little more for something better if you can
July 2, 2017
This is really only suitable for a shorter person with a tiny yard and a lot of patience. It doesn't lock into place, it's always loose and sliding out of place. The wanna-be edger part will do okay once you get a feel for it, but only if you have about 20 reams of line for it (line that fits this is so thin and weak it breaks constantly and is all gone about every 15 feet. There's no heavy duty line in a size of .070 like this weedeater requires.) If I had a bigger budget for this I woulda gotten something more substantial for my little suburban yard... this is way overpriced for its abilities.
The edger works fine but the only problem I have with it is ...
June 19, 2017
The edger works fine but the only problem I have with it is that when you secure the electrical cord it is so close to the start lever that it has hit it several time and started the trimmer before I was ready. Once it took a big gash out of my ankle. Now I am a lot more careful when inserting the cord.
If $25/year is acceptable for you...
September 24, 2016
I always take a low percentage of negative reviews as user error or lemons, so went ahead & purchased via Amazon. While worked was acceptable for trimming/edging, line replacement/feeding & ergonomics. Worked for 2 years then simply quit. Works out as $25/year. Intentional depreciation B&D? Acceptable return? Not for me, but maybe my expectations are too high. Written as I sit in lawn chair after troubleshooting as recommended to no avail, so have 1/2 way done yard.
no control over feed. wastes a lot of line ...
February 24, 2016
no control over feed. wastes a lot of line.otherwise it runs well.

Two Star Reviews:

4%
Battery issue
August 27, 2017
I am giving it one star because it has no explanation of the symbols on the charger. On my first attempt to use this, it would not work. I thought that since I had charged the batteries a week earlier that I needed to charge them again. One battery blinked red when inserted, the other blinked green once then nothing. The "instruction manual" needs to included more info on troubleshooting. Are the batteries faulty or..?
Weak
July 1, 2017
This is the third B&D trimmer/edger I've had in the past 6-7 years, each with a different type of battery. I've got to say, each model has become progressively weaker. If you want to use this one as an edger, forget it. I often have to go over the same grass 4-5 times. And I thought the wheel was a great idea until I tried edging in a straight line with it. Ugh.
Decent trimmer, terrible battery life
May 17, 2017
it is an ok trimmer, not an effective edger. Not especially powerful, even for a 20V. The biggest issue is the battery life. It might run for 30 min on a good day. I have a tiny yard, and one fully charged battery will not finish the job. If you need your trimmer to run for more than 30 min, ever, do not purchase this product. It will do fine for very small jobs.
I was very happy using the last two series Black & Decker trimmers ...
September 16, 2016
I was very happy using the last two series Black & Decker trimmers that were 18V. They made me give up gas trimmers for good. But this one has me thinking of going back to gas. I really won't do that--instead I'll find a battery model that works better than this one. The main problem is that Black & Decker has not figured out how to make the line advance feature work more than for about ten uses before it stops working. For me, that's about 3/4's of a year. The trimmer still works, but it just beats you to death because you have to go over the same ground repeatedly with a 4" piece of sting until it finally advances. The last time I used this one, I decided that I was done with Black & Decker trimmers. I'm getting too old (and the units keep getting heavier too). The Black & Decker battery blowers work ok and I will continue to use mine until it bites the dust, but I'm done with this trimmer.
More Disposible Junk From B&D
June 15, 2016
Trimmer worked great and was my favorite garden tool...for about six months til it quit. Great product until automatic spool feed lever gives out (which unfortunately is very common per their customer service).Bought this in April of 2015 and worked great until October when I first had to replace the spool that came with it. So I bought two new spools and each one lasted all of ONE week! Have bought four new spools since and now the feeder lever has quit altogether. Even the replacement levers I just bought are useless. Luckily it's still under warranty so I'm sending it back in for repair but when it quits again, I'll just scrap it and go back to a gas trimmer. Purchase at your own risk.
Broke on First Use
March 30, 2015
This string trimmer worked as advertised for approximately 40 minutes on the first use.To spool out more string, you tap the trimmer head on the ground. After doing this about 5 or 6 times on the first use, a retaining clip inside the trimmer head broke. As a result, the string unspooled indefinitely. I won't claim they all do this, but as this was my only experience, I returned it and will probably avoid B&D in the future.
6%
You'll spend a small fortune on line
July 30, 2017
This would probably be the perfect edger for me, being a petite woman taking care of a small yard. It's light weight with a lot of power and the wheel provide easy movement for edging. HOWEVER, I used the line it came with before even finishing one side of my very short driveway. I then bought additional line to finish the driveway and I had to refill it THREE times before finishing. I think I spent more time replacing line then I did actually edging. I thought this was a good deal and was saving money by going the electric route but in the end I'll spend a small fortune and a lot of valuable time on the line. Will return and go back to gas.
If you buy this, wear long pants when using ...
July 10, 2017
If you buy this, wear long pants when using it and buy Stock in the Line Company! The "Autofeed" does a lot of that! Too much in fact. The line is then cut off by a little blade in the Guard and flies into your shins and cuts them if exposed.
Most aspects were great: it's lightweight and did a fine enough job ...
July 1, 2017
I bought this two years ago (thus the warranty does not apply any longer--I should have returned it sooner). Most aspects were great: it's lightweight and did a fine enough job of trimming and edging. BUT the string and the spool--always always a hassle. I found that I had to extend the string each time I went to use this product and sometimes more than once during a session (the area I use it for is approximately 20' x 8'). Often I had to open the cap to perform this function and every time the string would loosen on the spool, so I would have to wind it tight again and sneak the cap back on before it unspooled again. Finally, a piece from the spool housing cracked off. I would have to completely disassemble the spool housing and replace it (the replacement part looked around $40 for a $65 product). Sigh. Not worth the effort and certainly not worth the constant work overall. I gave this two stars because when it worked, it was fine. But in retrospect, not worth those few and far between moments.
Uses trimmer line faster than I could replace the spool
April 23, 2017
I have owned 4 B&D trimmers over the years. They all had a particular life span and I was well satisfied with their performance. This current model gh900 was using up trimmer line faster that I could put it in. With my other models I could trim my property entirely on about half of a spool. This model I went through 2 spools and I was only about a quarter finished. At about $5 a spool this is crazy. I will search for another trimmer.
Great trimmer, while it lasted...
April 10, 2017
I bought this in August 2016, loved it, worked great as a trimmer and really liked the edger feature. Pulled it out in April 2017, first time to use it in the spring season and it died while edging my sidewalks. Seems to be an electrical short or something. Has a two year warrany, but closest authorized repair center is 90 miles away. Still debating whether it is worth repairing, even if under warranty, because the price was so low. I don't think I would buy Black and Decker again.
I ran out of the string in the starter spool before finishing on the first use
September 7, 2016
Main issue is the amount of string it uses. Have to change it at least every mow. I remember growing up and only needed to change the string about once or twice per season. I don't understand how we're going backwards 20 years later. It's not like Black and Decker is making more money on string My last unit was a Black and Decker battery unit that only needed to be changed every month or so. . With this unit, I ran out of the string in the starter spool before finishing on the first use. I had to re-spool to finish the job. Keeps loosing string like crazy.Other than the string, the unit seems fine and has plenty of power to get the job done. The wheel helps with edging. Would give it 5 stars if not for the sting issue.

One Star Reviews:

4%
One Star
September 11, 2017
Product broke after 3rd use - cap to spool broke apart and whole assembly fell out, and now I have to ship it 200 miles away for repair...Paula D (9/11/2017, 10:34:00 AM): Thank you for contacting Black&Decker. How can I help you?Me (9/11/2017, 10:34:38 AM): I need to find out how to get an exchange or repair on a LST420 20V MAX Lithium High Performance Trimmer and Edger, 12" I bought 6 weeks ago that is already brokenMe (9/11/2017, 10:34:44 AM): bought it on AmazonPaula D (9/11/2017, 10:34:53 AM): I apologize you are having this issue today. I would be more than happy to assist you with this, one moment please.Paula D (9/11/2017, 10:35:01 AM): What is your zip code please.Me (9/11/2017, 10:35:10 AM): 29485Paula D (9/11/2017, 10:35:49 AM): What you will need to do is get the unit in to a Service Center. The closest Service Center to you is listed below or you can mail the unit in to them. Factory Service Center #0423557-B Wilkinson BlvdCharlotte, NC 28208704-392-0245Paula D (9/11/2017, 10:36:12 AM): Just send the tool itself with a note stating what is wrong with the unit and your contact information. Name, address, phone number. You can also include a copy ofyour receipt to speed up your repair.They will evaluate the unit and repair or replace it per warranty.Me (9/11/2017, 10:36:28 AM): Seriously, 200 miles away?Me (9/11/2017, 10:36:52 AM): I don’t have a box that will hold a trimmer...who is paying for the box and the shipping?Paula D (9/11/2017, 10:37:49 AM): It is the customers responsibility to get the unit to them and they will send it back. As a 1 time courtesy I can email you a label but we do not have boxes.Me (9/11/2017, 10:39:24 AM): So your brand new product broke on the 3rd use and i have to find a box, buy a box, ship it to another state when i have two small engine repair places aroundthe corner, and you’re going to do me a "courtesy" and send me a label...? Wow, what a great first experience with B&DPaula D (9/11/2017, 10:39:40 AM): Once again I apologize but that is the closest place that works on our Lawn and Garden.Paula D (9/11/2017, 10:40:14 AM): Would you like me to send you the label?Me (9/11/2017, 10:40:20 AM): yes..Paula D (9/11/2017, 10:41:07 AM): What is your shipping address please.
Buy a different brand
April 26, 2017
I bought this in January of 2016. A few months ago the trimmer line stopped spinning, which required my husband to take the whole thing apart to fix it. It worked for a few more months, but is broken again. Time to replace with another brand.
The weed eater portion is nice for small yards though
March 1, 2017
It broke and the battery is shot, but my return window has closed. (I fully understand how to charge batteries, and not get memory charges or overcharges) Had for only a short while. Used it 3 times on a .75 acre. It fell apart at the cuplink, and then wouldn't work right after that. My unit is dead. Please don't waste your money.
I wish I had bought a WORX
September 1, 2016
Used this only three times for a total of less than an hour and a half when it simply stopped working. Amazon's return policy has expired and I cannot get any reply from Black and Decker except to mail it to California. I have many of the MAX 20 volt products but this one is a great disappointment. This will definitely influence my future purchases.
Battery charger is not working!!
July 5, 2016
Battery charger has already failed. When plugged in it only has a red light flashing with no battery attached. Tried to charge the battery and it will still only flashes red. Tired to charge both batteries and they will not charge. Not sure if it is the batteries or the charger. Included instructions do not say anything about the flashing read light. Not happy with this product.
Don't waste your money on this one
June 28, 2015
Don't waste your money on this one. It *dies* do a decent job trimming, on the extended run time setting.However...Each battery only last 15 minutes or so. (So much for that 30 minutes per battery B&D claims) That wouldn't be so bad, except that it takes 5 hours to recharge 1 battery, os..if you only get half your trimming done with both batteries, you have to wait for a minimum of 5 hours to have another battery to pop in to continue.I suppose, B&D would be happy as clams if one bought a couple of extra batteries, but I only have 1 charger, so, I guess I would have to buy another charger.Too bad B&D didn't offer a fast charger for these batteries. I could handle a 1/2 hour charge on a battery. LI-On batteries can handle it, with the proper charger.Anywho..this is going back to Amazon for a refund..It just isn't working out, use time-wise.
14%
Don't
April 18, 2017
The single line setup uses too much of the spool. There is no consistent spool control. You will spend more money on spools over time.
Outdoor 3 prong extension cords do not work with this!!!
September 21, 2016
Warning: The power connection on this does not allow a 3 prong extension cord to be used. The two prongs to which you are to connect a power cord are set down in a casing. They made the casing for the power plug too small to fit a 3 prong extension cord. I want to be able to use a 100 ft extension cord. The manual suggests at least a 14 gauge cord for that length. I am having trouble finding a 14 gauge (or 12) 2 prong that will fit it. I might have to find some kind of extender piece or just break off some of the plastic casing to make room for a cord. I might revise my review once I actually am able to turn it on. What kind of extension cord is everyone who is rating this highly using???
strong motor while it did last, auto feed is a piece of 💩.
May 20, 2016
I've had WorxGT battery operated unit before this one. The batteries would no longer hold a charge so I bought this. Being corded, it was much more powerfull than the Worx unit, but used more line in less than one year than in 5 years of useing the Worx. The whole issue with spitting out line is a serious design flaw. I couldn't even complete the edging, let alone the weed waking with a single full spool.Then 11 months after having it the motor has seized up. Going to go with another brand now.
Strings withdraws often
August 15, 2015
Immediately after taking it out of the box and using it the string drew into the spool with their winding of string. I tried at least 10 times to wind it properly and still withdrew back into the spool. When it withdraws I had to stop pull off the spool and rewind the string, this take up to 5 minutes each time. Almost every minute it withdrew into the spool. I sent it back.
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Pricing info
Old Price
Old Price
Price
Price
$99.20updated: Mar 17, 2020
$57.47updated: Mar 19, 2020
from 19 sellers
Features
Answered Questions
Answered Questions
Article Number
Article Number
0885911350549
0804067218695
Binding
Binding
Lawn & Patio
Lawn & Patio
Brand
Brand
Black & Decker
Black & Decker
Currency
Currency
USD
USD
Formatted Price
Formatted Price
$99.00
$49.99
Height
Height
1692.9 in
192.1 in
Length
Length
285.4 in
334.6 in
Manufacturer
Manufacturer
Black & Decker Outdoor
Black & Decker Outdoor
Model
Model
LST420
GH900
MPN
MPN
LST420
GH900
Number of Parts
Number of Parts
LST420
GH900
Product Group
Product Group
Lawn & Patio
Lawn & Patio
Product Type
Product Type
OUTDOOR_LIVING
OUTDOOR_LIVING
Publisher
Publisher
Black & Decker Outdoor
Black & Decker Outdoor
Quantity
Quantity
1
1
Reviews
Reviews
Score
Score
9
8.2
Studio
Studio
Black & Decker Outdoor
Black & Decker Outdoor
Warranty
Warranty
2 Year Limited Warranty
2 year limited manufacturers warranty
Weight
Weight
28.9 oz
24.8 oz
Width
Width
192.1 in
1432.3 in
Feature
Feature

The PowerDrive Transmission delivers more power from the motor to the cutting string so you can get the job done faster

Runtime Extension Technology with dual mode accelerator switch for high performance or longer run time

The Automatic Feed Spool ensures continuous work without bumping

Includes (2) 2.0 Amp hour lithium battery packs- each battery pack delivers 33% more capacity than the LBXR20 battery pack

Part of the 20V MAX System - A System that Demands Attention. 1 Battery fits multiple tools

AFS automatic feed system ensures continual work without bumping or having to stop

Power Drive Transmission prevents bogging down

Lightweight ergonomic design with adjustable height and pivoting handle

The 6.5 amp motor and high torque transmission provide maximum performance

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