Lithium 12 volt battery Is there a clear leader?

BFL13 wrote:
"In my mind, the ideal Lifepo4 charger would offer adjustable charge voltage (Like the PowerMax - but with a higher limit), and be a two stage design (though float is not necessary, nor harmful) so that the battery does not sit for an extended period while being held at maximum voltage..."

What limit is desired? It goes to 16.5v now.

It is adjustable single voltage (which does two battery "stages", bulk and absorption), but you want a charger end's two-stage.

Not sure how you can have a two-stage (at the charger) adjustable voltage that is automatic as seems to be desired here. You would need an adjustable timer to go with that, but that would need a trigger since you want the battery to get fully charged first and you don't know how long that will take.

The trigger would have to "see" that the battery is full somehow, and voltage can't be the trigger of course. However, it may be ok with Li batts, which start their absorption stages at a high SOC and you don't want them to be all the way full?

Thanks, upon a deeper dive I can now see that the powermax voltage does go much higher than is illustrated in the charge profile chart...By ‘two stage’ my desire was simply to not have the charger remain in absorption for extended periods...