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40-volt max 15-in Straight Shaft Battery String Trimmer 2.5 Ah (Battery Included) (Charger Included)

Ratings & Reviews for Kobalt 40-volt max 15-in Straight Shaft Battery String Trimmer 2.5 Ah (Battery Included) (Charger Included)

3.9
594
Review
 3.9 out of 5
594 Reviews


67% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The battery-powered trimmer offers good cutting power and quiet, fume-free operation. It is lightweight and well-balanced, making it easy to maneuver. The battery life is generally good, and the two-speed motor and variable-speed trigger provide good control and efficiency. However, some users found it difficult to reload the trimmer line and noted a lack of availability for replacement parts. A few also felt the trimmer was a bit heavy and awkward for extended use.

Customer review summary generated by AI, including incentivized reviews.
594 Customer Reviews

Exceptional performance

Would Recommend

I have been using mine for 3 years now and it has worked flawlessly, It is very efficient with the battery life and just as if not more effective than the traditional gas powered tool

December 21, 2025
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First time ever dissatisfied with an online Lowe’s

Product arrived poorly packaged, box open and when I took my purchase out of the shipping box it was obvious Lowe’s sent me an open boxed item. It was supposed to be an online exclusive so not even sure how that’s possible for an open boxed item. The manual is missing but I haven’t charged the battery to see if the product works because it’s a Christmas present. Hate leaving bad reviews cause I prefer Lowe’s for my shopping.

December 8, 2024
Verified Purchaser
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Response from Kobalt Team

Hello Mill. Thank you for your review. We are sorry to hear the item was received in this condition. We recommend to either return or exchange the it...

Kobalt TeamDecember 11, 2024

SunriseGlobal-Kobalt

Do not buy, you won't be able to get parts.

Would Not Recommend

I have had this thing a few years now and I loved it up to this point. The bump head wore out. Thinking oh this was produced only 4 years ago, and they still sell it, surely there are replacement bump heads. No, absolutely not, nothing. The replacement part has been listed as unavailable forever. I called the Kobalt number as other reviews mention, but yet they don't have the part anymore either. They tried to direct me to a bump head that wouldn't even remotely work.

August 26, 2024
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Response from Kobalt Team

Hello Phoenix. We are sorry to hear of your experience. We appreciate your interest in this product, and we apologize for any inconvenience caused by...

Kobalt TeamAugust 29, 2024

SunriseGlobal-Kobalt

Trimmer is a BEAST, Blower has nice features...BUT

Would Not Recommend

Ok, first off let me say that ALL of my Tools are KOBALT brand. I have dozens of batteries, 8 chargers and more 24V tools (and hand tools) than i could count in a day. I obviously love the brand. With that being said, i saw a "deal" for a KOBALT string trimmer and leaf blower combo for the very enticing price of $129.00 for both, so i jumped on it. I got the last on in the store. The string trimmer is a beast, super powerful with a ton of torque and the leaf blower has a nice feature where you c...

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spool replacement

Would Not Recommend

it's difficult to find dual line replacement spool. sales people don't know the correct spool for it.

July 20, 2023
Verified Purchaser
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Fantastic Weed Eater

Would Recommend

I have had this weed eater for about a year now, and I finally had to add new line to it. I googled how to do that, and could not believe how easy it was. You cut off 13 feet of line, feed it through and wind it up.... VERY NICE and Easy!!! I also have the edger and one 40V battery and can do my whole yard and sidewalks and still have plenty of battery left. These 2 items put the finishing touches on making my yard Look Great!

June 26, 2023
Verified Purchaser
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hard to get charger replacement under warranty

Would Not Recommend

The trimmer works well. However beware that you may have to jump through hoops to get a charger replacement under warranty. Took me 3 weeks of calling many times and lots of e-mails to finally get the correct replacement. A shame since the trimmer itself works well so far, have used it for 1 year now. But if cannot charge battery it is of no use. Should not have to work so hard to get a charger replacement that is under warranty. I have also bought a Lowes lawnmower and Lowes blower that c...

December 3, 2022
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Response from Kobalt Team

Hello Trini - Thank you for taking the time to share your experience. Some issues can be tricky to diagnose over the phone as issues can present in d...

Kobalt TeamDecember 6, 2022

SunriseGlobal-Kobalt

good for small or light trimming

Would Not Recommend

I had issues with some of the larger weeds. The line or the speed wasn't sufficient to take down the tough stuff.

November 1, 2022
Verified Purchaser
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Parts wear out- Lowes and Kobalt won't have them.

Would Not Recommend

Originally, I wrote a review on how difficult loading the string is and getting it to release reliably. New review- bigger problems one year later. It turns out Lowe's doesn't sell a replacement bump head, which wear out within a few months. Kobalt themselves will only sell the entire stringhead assembly- at close to $50 delivered and it's a substitute part, not original. So, why would anyone buy Kobalt power equipment? And, here's the kicker- the stated warranty only excludes the spindle ...

October 5, 2022
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Response from Kobalt Team

Hello,

Thank you for your review. We're sorry that the bump knob is currently unavailable. Rest assured, that this is expected to com...

Kobalt TeamOctober 6, 2022

SunriseGlobal-Kobalt

You will need to buy at least another battery.

Would Not Recommend

I choose to upgrade from a craftsman 20 weed wicker to this 40 volt model so it would last longer but doesn’t make that much of a difference.

September 22, 2022
Verified Purchaser
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All OK so far!

Would Recommend

I have only used the trimmer twice so far. The coming months/years will show whether the product is as advertised. The Kobalt trimmer was to assemble. The battery was about 90% charged out of the box! So far I have trimmed about 300 linear feet of grass and 600 sq. ft. of weedy ground. The bump head seems to be working well at this point. Again time will tell whether or not in a year from now if the bump head will still be working. The Kobalt trimmer weighs only a few pounds more than my old G...

September 19, 2022
Verified Purchaser
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poor quality.

Would Not Recommend

Charger is already not working on 9/12. We have used it 2 times.

September 13, 2022
Verified Purchaser
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Response from Kobalt Team

Hello KimC,

Thank you for your feedback. We are sorry to hear that you have encountered an issue with your battery charger. Try resetting...

Kobalt TeamSeptember 13, 2022

SunriseGlobal-Kobalt

Lasted less than 2-months

Would Not Recommend

On my third time using this item, it began to make a grinding noise. Shortly after, it stopped working. Back to Lowes for a refund!

August 11, 2022
Verified Purchaser
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Response from Kobalt Team

Hello,
We are terribly sorry to hear about this experience. We strive to provide a quality product and a great customer service encounter. It i...

Kobalt TeamAugust 12, 2022

SunriseGlobal-Kobalt

Decent trimmer, but has some fatal flaws

Would Not Recommend

This trimmer got the job done for me for about five years. I have a small lawn, but there's a lot of trimming along my walkway, my detached garages and a curb that runs the length of my border along my neighbor's driveway. The battery lasted the entire summer for the first year. Fatal flaws are: the battery died this year. It's probably my fault for leaving it in my non-ventilated garage where it gets very hot. Also: the trimmer bump feed never worked. The lines would break off 2-3 times during ...

August 7, 2022
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Response from Kobalt Team

Hello RudyFromPA,

Thank you for sharing your experience with this string trimmer. We greatly appreciate your honest feedback as it gives ...

Kobalt TeamAugust 15, 2022

SunriseGlobal-Kobalt