[clickman]

My frunk light shuts itself off after 2? hours.

I'm completely sold on the maintainer (CTEK in my case), and hook it up any time I'm going to leave the car for a week or more. Which includes 6 months of winter hibernation.

I even bought a Canadian Tire version for another car (I couldn't get the CTEK for the right price) and it had the desulfanation cycle that I wouldn't do without.

My understanding of batteries, limited as it is, is that they will discharge on their own (batteries in the store are always fresh, or should be). Any deep cycling is death. Get the maintainer and be happy.