If you’re an iPhone user, you may notice moments when the device gets really hot. This concerns many owners, but don’t worry. It’s perfectly normal for the iPhone to run hot, and there are many reasons why.
The most prominent source of heat on the iPhone would be the lithium-ion battery. Charging the device makes the battery warm, but discharging it also creates heat. That means that simply using your iPhone for long periods can create more heat around the battery.
The battery isn’t the only thing that runs hot. Almost every component in the device gets hot when in use. The Wi-Fi, video, Bluetooth and 3G radio all create heat. The GPS hardware gets especially hot when in use. This is why many users report the most extreme heat coming from the device when using mapping and navigation features.
If you’re worried about heat causing damage to your iPhone, you shouldn’t. The iPhone will shut off automatically when it detects an extreme amount. This can commonly happen in a situation where the iPhone is left in a hot car. It has also been known to happen with cheaper cases that may trap heat inside the device.
As with any electronic device, the iPhone will get warmer and warmer with every feature you use. It’s perfectly normal and nothing to worry about. If the heat is a problem for you, keep your iPhone in a cool and well ventilated area. You can also use a case to prevent your body from coming into contact with the device, but be sure to use a case that allows proper air flow through the device.