Batteries have become noticeably more expensive over the last 10 years. I did some research in battery technology. It seems that batteries are more advanced when you look at the higher capacity ones. They are built to withstand extreme temps. Add in AGM technology and your over $100 on the low end. My sonic uses a H5 battery. Best deal I found was a exide or Bosch AGM for the buck. Exide makes batteries for Pep Boys under contract utilizing the Bosch brand. I only use AGM batteries for all my vehicles. More money but a much better battery. So far my sonic GM battery is holding out. 2 1/2 years in the Florida heat is good. I usually get 3 to 4 years on any battery I use in Florida. Hopefully the Bosch AGM battery which is next on the list will last 5 years or more.