
Ratings & Reviews for Kobalt Gen4 40-volt 15-in Straight Shaft Battery String Trimmer
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.Great Battery life
Would Recommendbattery life is good
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
Love it
Would RecommendEasy quick assembly, not too heavy
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
Can’t mess up!
Would RecommendLightweight and easy to handle. Has a safety to avoid getting hurt. Works great.
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
Reliable with lots of power
Would RecommendMy second trimmer I purchased
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
Very convenient and easy to use
Would RecommendEasy charge easy to use very convenient
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
LITTLE ON THE HEAVY SIDE IF YOUR SHORT
Works great
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
Not impressed
Would Not RecommendThe unit bogs down in even the lightest use. The head does not feed well at all and battery life is subpar compared to other offerings on the market. I got so aggravated with the feed head that I threw the unit 20 feet and the frame snapped. I'll never purchase another Kobalt power tool.
Kobalt Electric Weed Easily
Would RecommendThis Kibalt Electric trimmer exceeded my expectations. After trimming my whole yard the battery was almost fully charged still. Great price Great product!
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
Works great
Would RecommendI have a lot of weedeating to do and this weedeater is up for the task. I was concerned at first that the battery would not last to get it all done but it does. Great weedeater.
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
Manufacturing error
Would Not RecommendI am Lowe's Pro member and have purchased many Cobalt products. This is the first time that I have experienced a poor Cobalt tool that shouldn't be on the shelf. I purchased a KST 1040A-03 trimmer, bneought it home and tried to assemble it. The sting guard does not line up with the screw holes at the end of the shaft. I called Cobalt customer service and was told it is a product problem and to take it back to the store to see if they could assemble it. I called N. Myrtle Beach Lowe;s 3 times to ...
Hi there! We sincerely appreciate your review of our Straight Shaft String Trimmer and are very sorry to hear that this was your experience assemblin...

Lite and clean.
Love it works fine ,lite easy to use and handling it for a period of time.
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
Avoid
Would Not RecommendLong time Kobalt faithful customer. This season I had to buy another weed eater(had an older model 40V Kobalt) and this thing is weak and worse than the older version. I am not sure anyone likes weed eating, but I hate my life now when I have to. This model lacks power and speed and it takes easily twice as long to do my yard now. It pains me to talk bad about Kobalt, but this might be the sign I was concerned about and it is time to find a new brand and company that doesn’t regress.
Hello James, we thank you for reviewing the Kobalt 40v String Trimmer. We are sorry to hear that the string trimmer fell below your standards regardi...

Lightweight weedeater
Would RecommendLight weight, has 2 speeds, good battery life for homeowner
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
String does not release, difficult to change as well
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified PurchaserVerified Pro
Hello there! We appreciate you reviewing the Kobalt 15" String Trimmer. We are sorry to hear that the experience with the string trimmer fell bel...

Very durable comes ready out the box
Would RecommendGreat product 2nd time buying
From Gen4 40-volt 15-in Straight Shaft Battery String Trimmer 4.0 Ah (Battery Included) (Charger Included) Verified Purchaser
Hi there, Micah! Thank you for your review of our 15'' Straight Shaft String Trimmer. We are very sorry to hear that this has been your exper...