From the same article:
reply"The phone a few minutes after finishing the benchmark. It no longer booted because the battery was too cold!"
Just put it in an oven if it gets too cold.
replyRemoving the case and putting it in mineral oil with a circulating pump and a heat exchanger would probably work better
replyIt takes a particularly dry and cool-as-ice sense of humor to label this solution a "simple" and "pragmatic" one.
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