
Ratings & Reviews for Kobalt 40-volt max 13-in Straight Shaft Battery String Trimmer Edger Conversion Capable 2.5 Ah (Battery Included) (Charger Included)
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers praise the trimmer's power and ease of use, with many reporting it outperforms gas models and handles thick weeds efficiently. The lightweight design, quiet operation, and long battery life—often lasting a full yard on one charge—are frequently celebrated. However, significant durability concerns emerge: many report spool covers breaking within months, bump feed systems failing, and string reloading proving difficult. Most frustrating is the unavailability of replacement parts, with customers unable to obtain covers or chargers, leading several to abandon the brand entirely. Overall, while performance impresses initially, long-term reliability issues and lack of support disappoint many.
Customer review summary generated by AI, including incentivized reviews.Piece of Junk!!!
Would Not RecommendGood idea gone bad. I love the freedom silence and clean operation of the electric motor. Problem: The head and the string. The whole thing gets jammed with fine sand and grass and stops working properly. The automatic string dispenser head just does not work!!! I have to clean the whole head with soap and water and toothbrush, while being careful to avoid water in the electric motor. And, then it will work for a while. And after one grass cutting, problem comes again. There is no real tech supp...
Horrible battery life, waste of money
Would Not RecommendBattery dead and red low charge in less than one year after purchase. Will take to Lowes for replacement battery. Poor quality. Edger is fine but lacks variable speed. I have many Stihl products that have been running for 15+ years w/o issues except plugs and filter once in a while. Wanted to try battery but if batteries do not last and are so expensive to replace, why would we buy these? More failed batteries to land fill. not environmental.
Hello MF - Thank you for your review. We are sorry to hear about the experience you have encountered with this battery. The overall battery life is d... Read More

Nice Trimmer
Would RecommendLighter than a gas trimmer. More power than an electric trimmer.
Verified Purchaser
3 years, and still doing the job
Would RecommendI always had trouble starting gas trimmers so I bought this May, 2017. It's been great and has done the job even cutting taller weeds. Battery lasts to get everything done (200 feet of fence, both sides of 180 foot long driveway, around several trees, fire pit, and around the house foundation). I did lose the wire flower guard a few months but Greenworks sent me another at no charge. Others have commented about issues with the string and bump feed but I haven't had any issues.
Kobalt 40V trimmer
Would RecommendI bought this to replace a standard gas type trimmer. So far it has been a good tool. No real complaints. Here's a video I made: https://www.youtube.com/watch?v=3B7MSJhDE0Y
broke after one season, very poor service
Would Not RecommendExcellent trimmer when it was working. The spool cover cracked so had to order a new one. Took 3 weeks. Went to put it on and one of the tabs of the spool housing was also broken so no way to keep the cover on. Ordered a new one (Order Tree is terrible), took two months and sent the wrong part. When I finally got to talk to a person they said the part was not longer available. Supposedly had a three year warranty when we bought it so called Kobalt. Never able to talk to anyone but their recordin...
Hello Mark - Thank you for taking the time to leave this review. We take our customer service experience very seriously. Since the beginning of the p... Read More

Toy!
Would Not RecommendThis is nothing but a toy posing as a useful yard tool. Within 30 minutes of use I had to dis-assemble the head twice to re-seat the wire. The tapping aspect top release string simply did not work. Also the metal shaft where the two pieces connect started to flare and then kept coming apart. Imagine the frustration as you are standing there holding two pieces of the unit because it comes apart. Then having to re-assemble that aspect of the tool as well. Mildy effective as a hacker and useless as...
Hello ScottyKay - Thank you for your feedback. We are sorry to hear about your experience. This is certainly concerning and Kobalt takes issues like ... Read More

junk
Would Not Recommendthis is a piece of junk! if the battery dies it will not recharge and they are a $100 apiece. I've gone through 4 batteries and 3 chargers. spent enough to have my lawn professionally done for years!
Hello - Thank you for your review. We are sorry to hear about the experience you have encountered with this battery. Here are a few troubleshooting s... Read More

Totally broken package and wrong status of order
Would Not RecommendI just received my order (Order#702179147) but the package is totally torn up with exposing the item. Please see the attachment for the condition of the box. The received item looks like a returned item and I can see some scratch through the broken box. Anyways, I don't want to accept this condition by paying a full price. I tried to return my order to the Lowe's local store but my order in the system of Lowe's wasn't completed to deliver yet. Therefore, a staff of local store couldn't procee...
Hello SUNGMUN - Thank you for taking the time to provide this feedback. We are sorry to hear that the unit seems to have arrived in an unsatisfactory... Read More

Not Satisfied
Would Not RecommendThe mechanics of the spring loaded bump feed doesn't work. It will not continue to feed new string into the trimmer for use.
Hello Willie - Thank you for your feedback. We are sorry to hear about the issues you have encountered with this product. Please note this string tri... Read More

Powerful battery, efficient unit!
Would RecommendI purchased this today at Lowes at a sale price of $99. I went to pick up a repair kit of fuel tubes and a button for my gas powered Bolens. I checked out the battery powered units and chose to purchase the Kobalt V40 and give it a shot. Setup was easy. I charged the battery for about 3 hours and assembled the unit in 5 minutes, (and I don't read instructions). I did not see a speed adjustment control as some units have to conserve battery, unless I just missed it...(because I don't read instru...
Operation ease
Would Not RecommendOne needs to POUND unit on a hard surface to advance line! Changing spools isn’t exactly easy!
Hello Bigfrank - We are sorry to hear that you are not completely satisfied with this product. When brand new, you may notice more resistance when bu... Read More

Epic fail, Kobalt
Would Not RecommendWorst trimmer I've ever owned. Other Kobalt products work great. This trimmer's weight distribution is comparable to a gas-powered trimmer with a bulky top that's heavy compared to the base. Most other battery-powered trimmers are more balanced. The absolute worst feature is the dual string trimmer head. The 'bump and go' is really 'bump and stop.' The 'bump' button gets jammed EVERY TIME I bump no matter how much or little force I use. The dual string reel (Kobalt brand) cuts for about 10 feet ...
Hello DH - Thank you for your feedback. We are sorry to hear about the issues you have encountered with this product. Please note this string trimmer... Read More

A step back from previous model...
Would Not RecommendI had to return my previous kobalt 40v (which was a beast it was the model this one replaced with two-speed selection and 2.5 AH battery with a big nice handle for my hands) the battery just quit charging which happens so i thought it could be an easy peasy get the battery swapped since it was just 5 months old. They couldnt do it and was told this one replaced it, but in terms of power its noticeably slower, the auto feed head doesnt work half the time and cones with the 2.0 AH battery instead...
Hello abacus - Thank you for your feedback. We are sorry to hear that you were not completely satisfied with the replacement you were given. Please ... Read More

Disappointed but hoping it gets better
Would Not RecommendFirst attempt to go non cordless with yard equipment so was very excited to try this. Pros: No cord, love that part. Battery life (did my 1/3 acre yard with plenty of battery life left) Price as I got it for under $50 with military discount Cons: Here's the big one, the string just refuses to advance beyond about 3 inches for any length of time. I tap it for auto advance and it extends then within a few seconds it back to being short again. I cant explain this one. Plus I had to take it a par...
Verified Purchaser
Broke after a few uses
Would Not RecommendToday was maybe the 4th time I used this and there was a loud bank from the head and now it shakes so bad I can't even use it and so much it shakes the guard right off. Something obviously broke in the head. Then the battery got stuck and would not release! Not worth $129 I paid for it, for sure. I'm not taking the head apart to find out what broke since I can't trust the battery to release either....
Hello Carol - We are sorry to hear about this experience! To remove the battery, press the latch button on the string trimmer, it should click and ej... Read More

40 volt kobalt 13" String Trimmer
Would Not RecommendDon't waste your time or money. It's heavy, and not very powerful. The bump line never works.The spool on mine broke in less then 3 months. Lowes won't exchange it because it's been over 60 days. They never even asked what was wrong with it.The Kobalt website and phone center says 3 months. The warranty is for five years. Seems like Lowe's is changing their return policy's so I'll be taking my business elsewhere.
Hello LouLou - Thank you for your feedback. We are sorry to hear that you are not completely satisfied with this product. We are committed to providi... Read More

Seems like a solid trimmer, once set up
Would RecommendI bought this to replace a 7 year old cheap 12” 18 volt trimmer. I have a relatively small yard and so the 18 volt trimmer worked fine, although the battery was starting to fail. This 40v trimmer is massively better. I have used several gas 25cc trimmers and I am almost certain that this one is more powerful. Battery life seems to be as represented. The trimmer did come with the guard set up for 11” cut. I flipped it around to take advantage of the full 13” and feel that it operates much more ef...
The tool works good
Would RecommendI was impressed by the cut it has and it does a good job so no problem with the tool itself but upon receiving the product with a battery (2.5 AH) & charger I charged the battery and the charger was hot. I looked at the Charger and found out it did not support the battery that came with it. The battery gets hot after use also so I will have to go replace it before I give the 2.5 ah a rating
Hello Nick,
Thank you for your review. We are sorry to read that you are having some issues with the trimmer head not feeding properly. P... Read More