I have:
-2013 with 75,000kms, new battery 4 months ago.
-2017 with 10,000kms, bought in June this year.
Just got back from a 10 day vacation.
Friend drove to airport.
2013 stays outside. Temp were approximately 0-8 C
2017 stays in attached garage. Say 10C daily consistently.
2013 resting...