Lithium 12 volt battery Is there a clear leader?

Thank you Mr. Wizard. I obviously was thinking of a different battery which is an error on my part. Shunt regulation is how I regulate charge current limit in an equalization exercise so the practice is valid. Some thermal dissipation issues.

Sounds like a tiny Meanwell is a feasible charger. Maybe a <100 watt model. Rationale for tiny is weight.