I will give you a disadvantage of Lithium. I replaced all my batteries last year. Started to do the 3 lithiums then I was told Mercury issued a service bulletin 9/22 concerning these batteries. Among other things Mercury wants a battery heater for lithium cranking battery when temps in the 30's. And some models still void warrenty if it aint on Mercury's list of engines approved for special lithium batterys. After reading all that and seeing lithium battery fires on the rise news reports I went with AGM. CBS news just had another news report tittled " Lithium battery fires on the rise" today 6/15/23. I know lots of boats have them, but with my 3 batteries 2" away from 20 gallons of fuel and my kid sitting less than a foot away from that I went with the old school stuff. I own lithium batteries for all kinds of stuff, phones,laptops, flashlights.ect but my family is not sitting near fuel/battery mixes with these and they do not have extreme temp swings like 110degrees in the summer and 30 in the winter like my boat does