3. Duracell

The fact that Costco makes one-third of all its profits exclusively from Kirkland Signature’s products is due to several reasons. One of them is that, within their price range, Kirkland’s products are reliable and satisfy customers.

One of the many products offered by Kirkland is batteries. While many buyers tend to stick with well-known brands for electronic products like these, with Kirkland, you’re still getting a product manufactured by a major brand: Duracell.

This information was revealed by Costco’s CEO, Craig Jelinek, in 2016. Kirkland’s batteries offer good quality and are more affordable than most other brands.