Did not want to leave again tons of Euros are again at the watchmaker for batteries that do not last longer. So buy watch tools and then according to the watch the matching batteries ... And these ones are good. For a long time durable hold, just as long as the watch maker (if not longer) and costs only a fraction of. I had this kind already sometimes bought at a shop for 2 euros each !!! here on Amazon starting at 2 euros for 10 pieces, so the total price savings. Who can change alsodie batteries itself, which should definitely do.