even lead acid doesn't do well in siberian conditions, cars used in the cold areas must have manual cranks to start them because the batteries produce no charge

i think lithium would be ok but you should add a heat panel and heavy insulation and temperature regulator

they work best if you can keep them always at a perfect 27'C

i had a nightmare in -8'C conditions with an aluminium body sony smart phone back in 2015, it would run to zero in an hour or two - i couldn't get inside and it wasn't warm enough in even my deepest pockets