Question about Netatmo Smart smoke detector

For all those who have a device with an empty battery after just a few years: I contacted Netatmo support, together with a copy of the receipt from Galaxus/Digitec. After a few days, they sent me a voucher code with which I could order a replacement from the Netatmo shop free of charge. Simply start the support enquiry via this link: https://helpcenter.netatmo.com/hc/en-us/articles/360025538732-Can-the-battery-be-changed-after-10-years Of course, I can't guarantee that it will always work, but it's certainly worth a try.