I have noticed a difference between Duracell coin cells purchased at Costco and Amazon Basics coin cells. The Amazon Basics ones didn't last long at all, the Duracells seem much better.
The newer dimmers (STYRBAR) use AAA cells instead of coin cells, so I'd expect them to last a lot longer.
Related, Panasonic's rechargable eneloop have worked very well for me, I'm kind of excited to see AAA be used in the IOT devices where it can fit.
I have a lot less of a problem swapping batteries if I just have a few charged ones on hand and get at least many months in-between replacements.
Just a heads up: IKEA's brand of rechargables are likely rebadged eneloops at about half the price, also made in japan. Though for the AAA's they only have eneloop regular equivalents not eneloop pros.