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Gen4 40-volt 15-in Straight Shaft Battery String Trimmer

Ratings & Reviews for Kobalt Gen4 40-volt 15-in Straight Shaft Battery String Trimmer

4.1
1264
Review
 4.1 out of 5
1270 Reviews


71% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The battery-powered trimmer provides good performance for most residential yard work, with a long-lasting battery, two speed settings, and a relatively lightweight and easy-to-use design. It cuts through grass and weeds effectively, though may struggle with thicker vegetation. The main drawbacks are the difficulty in restringing the trimmer head and the lack of availability for replacement parts. Overall, it is a solid choice for homeowners with small to medium-sized yards who want the convenience of a cordless trimmer.

Customer review summary generated by AI, including incentivized reviews.
1270 Customer Reviews

trimmer

Would Recommend

Used 2 seasons and still working. Used for about 1.5 hrs a week. Works well in grass and smaller weeds.

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Died after 3 years

Would Not Recommend

Just took it out to use after winter and it no longer works. I tried three different fully charged batteries and nothing. Called Lowes customer service and found out that since I didn't keep the receipt the warranty is useless. Will look to buy a different brand.

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Response from Kobalt Team

Hello there! Thank you for reviewing the Kobalt 40v String Trimmer. We are sorry to hear that the string trimmer fell below your expectations. We wou...

Kobalt TeamMarch 8, 2026

Chervon-Kobalt

Kobalt lithium string trimmer is great

Would Recommend

Works like a charm. Easy, intuitive, well-built. Purchased for private home use v

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No longer charging

Would Not Recommend

Within 4 months of purchasing this trimmer the charging base stopped charging my battery. Would not recommend.

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Response from Kobalt Team

Hello Joel! Thank you for reviewing the Kobalt String Trimmer. We are sorry to hear about the charger base and would recommend attempting to disconne...

Kobalt TeamMarch 1, 2026

Chervon-Kobalt

Kobalt line

Would Recommend

Solid construction

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Good product but skimps on extra spools.

Would Not Recommend

It is a solid tool, works well and more than enough battery to do a whole yard plus some. It is a bummer that this company cannot include an extra refill spool pack. Most other companies, even lower models of Black and Decker or Greenworks came with a refill pack. For the cost, they should include at least one. Would look at other brands before buying Kobalt as a refill spool will set you back $20 anyway.

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Response from Kobalt Team

Hi there, Nick! We appreciate you taking the time to review the Kobalt Gen4 40-volt string trimmer kit. We'll pass your comments regarding the re...

Kobalt TeamJanuary 26, 2026

Chervon-Kobalt

Great Value for the money!

An Awesome product!

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Kobalt Gen4 40-volt 15-in Straight Shaft Battery S

Would Recommend

[Employee of lowes] .

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Don't buy

Would Not Recommend

It's very difficult to restring. It's just a piece of garbage. All plastic.

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Response from Kobalt Team

Hi there! Thank you for you review of our String Trimmer. We are very sorry to hear that you are having a difficult time restringing the trimmer head...

Kobalt TeamDecember 23, 2025

Chervon-Kobalt

It's also adjustable

Would Recommend

Long lasting battery

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Electric powerful string trimmer

Would Recommend

Ideal for a homeowner with a small to medium size yard. However, I must add that I've done some very big jobs with it. Light weight, easy to use, and it's electric. Run around 45 minutes on a charge.

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