You’ll probably love this, then @Anoran - it’s a safety comparison of LiFePO4 batteries with other types. On page 8 they look at how much energy different battery types can release when they fail. The Li-Co-O are regular Li-ion batteries. LFP is Litium-Iron-Phosphate (LiFePO4). On a scale that shows now much energy the Li-Co batteries release, the LiFePO4 looks like a straight line at 0.
They all release the energy stored in them when compromised but the Li-Co batteries themselves are very flammable and why electric cars are so hard to put out. Consider that some people are mounting house batteries in garages or on the outsides of their house and some manufacturers are using Li-Co for them. No way, ever. I have a house battery but went specifically for LFP. Bump that with a car and it won’t take your house with it.
Anyway, LFP is so much safer for UPS units or emergency batteries. Heavier, slightly lower capacity, but so much more safe.