After 12 years I finally decided to replace my 2 key fob batteries. No issues but when my C6 batteries died last week I was asking for trouble with my GT by pushing the limits. It would be nice if the new ones lasted the same length of time. Only $6.98 for a quality brand 6 pack on ebay. Can't beat that. I used all 6 for my 3 cars as they ALL were the same size and type. That was nice.Energizer 2032 Lithium Battery (6-pack)

 

Good stuff