Having this battery drain issue as well on my 2015 Q70. I think the car has some kind of electronics issue because other stuff acts weird: interior lights flash on and off when opening door after shutting down engine; seat won't move back/steering wheel won't raise when exiting car unless I open/close the driver's door a couple of times (I have the seat memory set to do that to make getting in/out easier); interior overhead light is very dim if it evens comes on when opening car doors, etc. Came home today from a 10-day trip and car battery was totally dead. Car had been in garage the entire time, so even though it was cold outside, temps probably never got below 50. The one thing I did differently was lock the car before I left; never have done that before...not sure why I did it this time. Anyway, SIL said that that arms the alarm system in the car and that's probably what drained the battery. And yes, it is a fairly fresh battery and this is the car I normally drive all the time, so the battery was probably pretty charged up when I left town. Will also check seat warmers/coolers and other on/off systems from now on before exiting the car, as many of you have recommended. Thanks for the many comments on that! Now, does anyone know if a battery trickle charger made for a different make/model of car will work on these Infinitis? Lol! (I have one for my other car, but it's a totally different brand...)
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