Unfortunately, some of the information presented in the quoted post is misleading and irrelevant. When properly installed lithium iron phosphate (LiFePO4 or LFP) batteries are safe. In fact, even when abused they do not present a significant safety hazard.
In the linked video a battery alleged to be a LFP battery is repeatedly hit with a large metal digging bar, eventually some smoke appears and after additional strikes with the bar flames appear. This kind of pseudoscience is a simply a distraction. What makes it pseudoscience? We can start with the absence of any any safety protocols even basic PPE. Then there is no a priori protocol guiding the "test," it is just whack it with a big metal pole to see what happens and then whack it again. In the video they state the battery has already been damaged by other "tests" they have conducted. To their credit, they do state they believe this fire is burning electrolyte and not the thermal run away fires other lithium chemistries are prone to. Ask yourself, how often are the batteries in your boat subject to the conditions depicted in the video?
The article about the lithium battery fire that went on for two weeks is simply irrelevant to a discussion about LFP batteries on boats. While the cause of the fire was not reported, it was reported lithium ion batteries were involved. Some lithium battery chemistries present a greater fire risk than LFP batteries which appear to have little to no risk of spontaneous fire. The source of this article should also be considered. It appears to part of a marketing effort and not legitimate journalism. (See the image of the page header below.) Clearly they are motivated to raise anxiety in order to sell their services.
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ABYC has conducted extensive destructive testing of LFP batteries and not been able to set them on fire although by driving a couple nails into one battery they were able to get to smoke. ABYC is confident enough in LFP safety that they have issued standards for installation. Follow those standards and use appropriate equipment and you will be safe.
The ABYC has ratified standard E-13 for lithium ion batteries on boats. Let's take a look at the standard and what it means for boaters.
panbo.com
And a real world example of what can happen when a LFP battery is over charged:
Solar charge controller failure can damage battery management systems. Informed choices and a sound installation help prevent problems
www.proboat.com
In the end it behooves all of us to vet our information sources before posting. Providing information of dubious provenance is a distraction from productive and informative discussion.