They Let Their Phones Get Hot
Smartphone cases are meant to protect your device. But, in fact, many first- and third-party cases could be doing damage to a certain component on your iPhone: its battery.
That’s because leaving the case on a charging iPhone won’t allow the device to breathe as well, which could lead to overheating.
Heat and electronics don’t mix well, and heat is especially damaging to your battery’s overall capacity. This is especially true if you live in a hot environment or your iPhone is charging in direct sunlight.
Try removing your case when charging to keep your iPhone’s battery cool – and follow these other great iPhone battery-saving tips.