[gumby]

> I recall one cold-chain company being well known for its back-up battery because medical products are often stopped in customs, and the boxes cannot be plugged in.

This is very interesting. Is there not a problem with battery-powered devices operating in a cargo plane? The whole point of batteries is that they have a lot of energy in them, which is why they get hot while operating and sometimes simply catch fire. I thought there were a lot of restrictions on transporting them.