I've ordered these twice now, one set in 2017, and again this year to replace/supplement that first set.We need around 100 CR2032s for all the leds, decorations, and tea lights we use at Halloween. So I bought these for the good reviews and one of the better prices for a bulk set. The props and lights are turned on for around 6 hours, and then the batteries get taken out, put in coin collector sleeves for storage, and then taken out again next year. I check each year with a battery tester, and uSee full review