Change History

he only draw that should be placed on that little circuit is the parasitic draw of the car and the keep current for the various electronics nannies

Its service life should be that to rapidly swap the batteries. Say, 2 min. I suspect that one maybe should really disconnect the original and seconds later plug int he maintainer, since there will be a differential from dead-ish to live batteries, even no-load.
Grant

he only draw that should be placed on that little circuit is the parasitic draw of the car and the keep current for the various electronics nannies

Grant