Maybe I am unlucky with cars or maybe it’s because we have such cold winters but it’s not like they put the best batteries in at the factory. I suppose most times I could have made them last a little longer but once one dies twice I replace it.
The alternator job is to maintain the battery. I am not saying it will damage it, but there is a good possibility.
That’s nonsense. When driving at night with all lights turned on, radio, heater, etc. the current delivered by the alternator would be comparable to that when charging a dead battery.