[lightedman]

I suspect we will be finding this technology being used a fair bit in aerospace tech like satellites to compliment the onboard solar, given the low-temp operational capability.

[gpm]

Do satellite batteries run cold?

Given the difficulty of radiating heat away I would have expected the opposite.

Especially considering the incentive to send up as little battery as possible, and the very predictable day/night cycle leading to the ability to precisely predict how small a battery you can get away with...

[rcxdude]

Generally it's hard to control: it'll be hot sometimes and cold other times, so a wide operating time is useful.