Last I checked, battery replacement for a Spark was something like around fifteen thousand dollars. That's more than twice what I paid for my 2015. Seems like a pretty strong incentive not to provide warranty service. I think I read in an article somewhere that (for not sure which particular model, but not a Spark) Chevy had never had to do a warranty battery replacement, even once. Note the word "had". There's a big difference between "did" and "had". Just because they never "did" one doesn't mean they never "had" to do one. BTW, I still love my Spark. It's brilliant.