Slow cranking is occuring fairly regularly. The voltage showed 15.1 on the battery monitor. I have not changed the battery on my 16' since buying it in 2018.
I had it tested and the reading came up Crank : Fail, replaced it, turns over just fine now.My car is slow cranking too now that temps have dropped. Gave battery a full charge last week and it’s still noticeably slow. Original battery, car built Dec 2015, PDI’d March 2016. I think it’s time for a new one……….