Panasonic CR2330 3V Lithium Battery - 5 Pack of Long-Lasting Single Use Coin Cell Batteries for Watches, Calculators, Key Fobs & Medical Devices - Reliable Power Solution

I bought these CR2330 Lithium batteries for my TESLA key fob. The first one I put in lasted exactly 26 day before it died. I could not believe this battery was the problem, but I tested it on my voltage tester and it registered 2.13 volts. It was 3.21 volts when I installed it so I know it was good. Put in another one from the pack. Also tested 3.21 volts. There are reviews of this battery on Amazon that have had the same problem. My 2021 Tesla is 3 years old and I have replaced the batteries from other sources and they usually last 6 or 8 months. Maybe they aren't genuine Panasonic. Can't tell, but just 1 more review showing this same problem. I will try a different brand next time. Read the other reviews.