Bought the 4-pack black ones a while back. They did work great at first, very load beeper too compared the original Apple AirTags. But... when I had to replace the battery for the first time, issues started. Within a week or two, after the battery was replaced, I started to get low battery warnings. I thought that had placed a bad battery, so replaced it again with a new battery. Again... same low battery warnings within a week. Cleaned the battery, contacts... did help for a short while, but it battery warnings again after a few weeks.
And not one just one of the four Chipolo's... all of them. It seemed that it also was related to the latest firmware update, because the ones that I updated first also got the low battery warnings quicker. It almost seemed to drain the battery more. Sometimes when I got the warning, the battery gauge did show around 10% and a minute later 100% again.
Also, I have to say that the outer contact in the battery holder is just too small. There's very few contact surface compared to other devices that use the same type of lithium batteries. In one of my Chipolo's that contact almost broke off.
After almost two years my wife and I got sick and tired of those low battery messages, so I bought a 4-pack Apple AirTags on sale. These work much better, albeit that the beeper isn't as loud. The U1-chip locator function does compensate for that though.
And not one just one of the four Chipolo's... all of them. It seemed that it also was related to the latest firmware update, because the ones that I updated first also got the low battery warnings quicker. It almost seemed to drain the battery more. Sometimes when I got the warning, the battery gauge did show around 10% and a minute later 100% again.
Also, I have to say that the outer contact in the battery holder is just too small. There's very few contact surface compared to other devices that use the same type of lithium batteries. In one of my Chipolo's that contact almost broke off.
After almost two years my wife and I got sick and tired of those low battery messages, so I bought a 4-pack Apple AirTags on sale. These work much better, albeit that the beeper isn't as loud. The U1-chip locator function does compensate for that though.