This is not so bad as most seem to think. Consider deep deep north with no sun, no wind and -40C. Pre-charged lithiums are dead too, unless you keep them warm in your trouser pocket.<p>At this moment however, peltier element ( <a href="https:&#x2F;&#x2F;youtu.be&#x2F;R1A5qc872Ks" rel="nofollow">https:&#x2F;&#x2F;youtu.be&#x2F;R1A5qc872Ks</a> ) makes more sense, mostly because you can use the wasted energy to boil rice or warm up your hut.