Has anyone here monitored the life of a particular brand wafer batter for their Key Fobs?
BTW, the Sony brand, I've been using, doesn't seem to last very long, maybe, a couple months.

 

I put new one's in mine in spring or last year and they still work fine, don't know the brand though.

 

Weirdo brands have usually not serviced me well in any device, so I stick with either Energizer or Duracell when it comes to CR2032 batteries.

 

 

Spend a little more $$$ and buy your CR2032 batteries at your local drugstore or Home Depot/Lowe's so you can get a name brand like Energizer or Duracell and be sure that it's not a Chinese knock-off like those sold on Ebay. Most importantly, buy the freshest stock available as determined by the "Best Before" date on the package since batteries get weaker the longer they sit on the shelf.

Be sure to keep a spare CR2032 battery in your glove box to replace your Smartkey fob battery when it dies. You should get a low Smartkey battery warning on your dashboard.