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battery charging anecdote.
our 4th gen was a Garage Queen/show car that we rarely drove. (60k miles in 20 years)
the 4th Gen cigarette lighter was constant hot, regardless of Key.
we had a battery tender on the battery terminals, and the wife did not like messing under the hood.
so I put a cigarette lighter adapter on the "quick disconnect" of the battery tender, and we put the battery tender in the cigarette lighter of the center console.
the wife has much happier, and it WAS easier to break it out for a quick ice cream trip or romantic dinner, and you did not have to worry about the leads dangling and touching each other.
however, the CD changer went bad, the radio went bad, the ECM got corrupted, and the car would barely run.
It took several hours on the dyno to figure out the ECM (if they reflashed the ECM, it would crank & run normally ONCE, then never again...until they reflashed the ECM) and a few days to get a new ECM on site.
so we put a NEW battery tender back on the battery terminals, and never had another problem.
so IDK if the one battery tender was bad (we had a HARLEY tender that would destroy batteries, but it was never on the car). Or if the digital spikes of the tender destroyed the electronics. Assumption would be the battery acts as a capacitor, and absorbs the spikes, so the electronics in the car do not see the spikes.
IDK/YMMV, just another $1000 wasted on a car.....
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