Renata 3 394 Button Cell Watch Batteries

Working perfectly. Used these before, they last long and never leak. Don't buy too many at once though, they last for 1 or 2 years in a watch, while unused stored batteries will get fully discharged in 5 to 10 years. So every year, 5 to 10% capacity loss. And that means, if you keep a battery for 4 years and then use it, though it might be new, it will only have 60% capacity or slightly better. Might as well buy a new one when needed. Price has been increased by the seller though, I bought these for 299, now they are being sold for 499.

Yep, they work. I bought these on the basis that they're the same brand as my Swiss Army watch knife. So far so good, they revived a 40 year old Seiko

The product was typical to the description

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a real quality product with the battery chemistry I required!