Charging a battery when it's too hot -- or too cold -- is a surefire path to avoidable battery wear.
Jason Cipriani/It's getting hot out there, so hot the iPhones are feeling it.
But fear not, Apple has a lot of safety mechanisms built into the iPhone to protect the battery from conditions that might damage it. High on that list of things that can damage a battery is heat.
In fact, heat is the number one premature killer of rechargeable batteries. Charging a battery when it's too hot -- or too cold -- is a surefire path to avoidable battery wear.
Also: 5 ways to keep your smartphone working like new, for longer
Apple has a lot to say on the subject of heat: The iPhone (and iPad, iPod, and Apple Watch) all operate best at 32