Who can tell? Took delivery of my CX-5 in August '12. Dealer tested the battery fine August this year. My Miata went into service November '09 and died after moving it from the garage to the driveway for a wash 'n wax in May of '18 - after 8.5 years.
I hope this doesn't constitute a thread hijack. If Craigo would chime in...I hope to import my Canadian CX-5 to the USA in '19; using it for four winter months and leaving it garaged the remainder of the year in Tucson. I assume the heat there is similar to Texas - it was certainly plenty warm during a week there in June. If death-by-heat is a southern US fact, before returning to Canada can I mitigate the effects by removing the battery and taking it into the house proper where the AC keeps the temperature at 85F?
Brian