So I have a 19.5 sea nymph gls and just picked up a 70lb minn kota and usually use 2 batteries on my main, kicker plus lights and FF, and now looking at adding another 2 batteries for a (24v) trolling motor. My question is if four batteries is overkill on a 19ft boat and if I should just buy a starting battery for my main a kicker and just use 3 batts altogether. Just seein if anyone's been there