Thanks everyone for the feedback. For this situation, with some critical loads that don't handle the switching well, it sounds like using a chargever...

@jpangburn, Agreed. It would be nice to know. My guess is that the first battery is the one that is used. As far as I can tell, the batteries don'...

If you have multiple Lifepower 4 batteries in parallel. They will likely drift apart on SOC if not charged above 80%.