the worst battery I have ever bought, I changed 3 cr 2032 from a new package for a car key and for a week I have been looking to see what problem the key might have. In the end, I say could they all be fake, I buy a branded one and voila! the key works normally. Never buy this and waste your time. Better give the amount to someone who needs to catch and place it!!!!

They don't work!!! Half of them don't even function from the start and the other half stop within a week without warning. I had put one in the car key and after one week it "left me," it didn't even show any indication that the battery was running low as usual!

The performance is good, the package as a collection of sizes/types is good, but if you need quantities, it is more cost-effective to purchase individual battery packs per type.

I have been using this brand for coin batteries for quite some time now and I have been very satisfied with their durability. I have not noticed any wear and I have several stored for emergencies for at least 2 years.