So the vehicles that use lithium batteries must keep them heated constantly if the vehicle is left outside?
Nope.
Please note that I said while charging or discharging.
They can generally sit at freezing temps while idle without problems.
Additionally, please note that I stated some batteries are available with a self heat feature.
I’m no expert on these batteries, but I’ve done a bit of digging to make sure I could use them without issues.
Also realize lithium batteries are higher voltage than a LA battery. Thus, they required a higher charging voltage. They typically need 14VDC +/-2VDC.
You can charge them with a standard LA charger but they only reach about 80% SOC. And this will also cause a reduced life span.