Lithium starter batteries

[Goran]

Have to agree, I would be scared of using and leaving Lipo batteries in a car.
Modern ones are quite good, for example I have some 3 or 4 year old lipos of only 850mah, used in rc jets drawing 20A fairly regularly and they have not puffed and capacity still seems to be good. But there are too many cases of fires especially when charging.
Even for the LiFePo4 that's in my car now I bought some very high temperature insulation which I'm going to install soon for peace of mind. Its Pyrogel XT flexible sheets (I wanted XTF but could not get hold of it).

I forgot to add, the recent 787 fires were LiFePo4 weren't they? That worries me a bit.