When i leave my car parked and off for more than a month i often have to charge/replace the battery. However when i disconnect the battery it somehow lasts way longer. I cant think of anything that is on all the time when my car is parked (no alarms, remotes)
In: 3
It sounds like your vehicle has a phantom draw. It’s could be any number of devices as cars are full of them these days. It could also be a short.
The reality is it will be near impossible to trace and diagnose, and even if you did there is no on off switch that you are not flipping.
Old classic cars and older modern cars have this problem in common. 1 additional way of dealing with this would be to put the car on a battery maintainer/trickle charger.
Good luck
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