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FYI, standard commercial grade (i.e. cheap) electronic components are rated to operate normally from 0 C to 70 C (32 F to 158 F). Industrial grade components are rated from -40 C to 85 F (-104 F to 185 F). Then there are further extended and MilSpec ranges as well. These are the temperature ranges where the components are tested and intended for usage, not their absolute limits nor merely limits for surviving storage.

The temperatures used in the test really aren't anything out of the ordinary for electronic devices. Shoddy construction can cause devices to fail at temperatures it should be able to survive (see X-Box 360). But from an engineer's perspective, the test isn't very impressive. High temperatures tend to cause more destructive problems than low temperatures, and the test didn't even approach the upper end of the commercial-grade range.