Fugazi
I have two 85amp bats on maverick and apart from when they went capput the other week (old and worn out like me) I have had no problems. I have live bait wells run 2 gps, 1 vhf, 1 sounder and sometimes a cb and deckwash lights etc
From a safety point of view I would recommend having a 2 battery set up. Its not that expensive to do with 85ah leisure bats available for around