A little warm for pocket carry? :)
Maybe able to bolster the heater in an EV?
“They can not only operate at high temperatures of up to 200 °C (392 °F) but they actually work better when hotter – at 110 °C (230 °F), the batteries charged 25 times faster than they did at 25 °C (77 °F)”.
Would that be too warm for an E-car battery?