I have a SmartTag2 that drains the battery extremely quickly.
I even took a battery from a brand new and sealed SmartTag2 and installed it in this device, but after about 3 days it reported Low Battery.

I then tested the same battery in another working SmartTag2, and it worked normally without any issues.

I also tested 3 different new CR2032 batteries from different brands, and the same problem occurs with all of them.