The maximum operating temperature of a product, just means it will operate for a limited time. If you want the device to actually last, you should never operate it near any extreme.

A little over 2 years ago, I had to fix a camera system were an idiot IT guy had put the CCTV power supply in the attic. Of course it was dead and had burned up. But what was even funnier (or scary), he had put a Tripplite battery backup next to it in the attic as well!!! I don't know how the battery did not explode, the case was bugling on all sides by over an inch. I carefully removed it from the attic with full arm gloves and a full face mask. Told the customer to stay back as it literally was a bomb waiting to go off. I think he thought I was overreacting, even thou you could see the massive bulging on all sides. Sent him to Youtube and did a search for exploding SLA batteries.

I just don't understand how people can be so stupid. Especially when it is a job and you are working on other people's property.