There are both advantages and disadvantages not counting price
Li Type batteries are fairly fussy eaters. the better ones have on board charge regulation... And some companies say "Do not connect in parallel". (Others I do not know about my LI battery is "Do not parallel" (not a problem)
They also have the advantage of
LA run down down down stops
LI runs run runs runs runs stops
You can run them down ever farther and they hold almost constant voltage till nothing.. this is both an advantage and a disadvantage.
LI is way way way way lighter (Major advantage)
if money was no object it'd have converted.
