I have read the link (after my initial response) and it clearly refers to Lithium Ion several times.
I would not use Lithium Ion on my boat
other than in small tools, and even then some form of "safe box" is a pretty good idea, and don't mess around with the factory supplied charger
unless you really know what you are doing.
LiFePO4 on the other hand is a safe technology when correctly installed, just as safe as Lead Acid in my opinion which can also catch fire in extreme circumstances.