1. 2015 Tile beacons work fine with the plugin
2. 2016 Tile ("new") will only work with the plugin when the phone app is NOT running. They stop sending beacon like broadcasts when in range of a Tile phone app.
3. you can replace the Tile battery by forcefully open the plastic box and unsoldering the battery and replacing it with a new battery -- need to solder at very high temp and for a short amount of time attaching a very thin wire and cutting of excess tin.
but the result looks ugly -- I am fine with it but spouses might have a problem with it .
opened Tile with new battery:
I removed some plastic where the solder is on the new battery to give it a bit more space.
Karl