I recently bought an iphone 15 and it heats up every time I put it on charge. I am using apple original cable and power adapter, still the issue persists. Why this issue in a brand new phone with a brand new battery? Is this a software bug or iphone 15 has this issue?
iPhone 7, iOS 15
It’s normal in my experience with 15PM. Using the 20W Apple charger and cable that came with iPhone my iPhone gets what I would call warm, but not hot, when charging. But I live in Florida, so maybe my idea of hot is different than yours. 😀
I had a 14 PM, 13 PM, 12 P and 11 P and in my experience the 15 PM gets warmer, but that’s to be expected because of the higher charging rate because of the USB-C connection. The other iPhones used Lightning connector which charged at a lower rate, which produces less heat. I gladly take the additional heat for the faster charging.
If the heat bothers you, use a lower wattage charger and the rate will slow down.
It’s normal in my experience with 15PM. Using the 20W Apple charger and cable that came with iPhone my iPhone gets what I would call warm, but not hot, when charging. But I live in Florida, so maybe my idea of hot is different than yours. 😀
I had a 14 PM, 13 PM, 12 P and 11 P and in my experience the 15 PM gets warmer, but that’s to be expected because of the higher charging rate because of the USB-C connection. The other iPhones used Lightning connector which charged at a lower rate, which produces less heat. I gladly take the additional heat for the faster charging.
If the heat bothers you, use a lower wattage charger and the rate will slow down.
Fast charging generates a lot of heat (physics rules!). When you fast charge your iPhone it will pause at 80% to allow the battery to cool down, and may display a message explaining this pause. Some time later it will resume if you leave it plugged in, but it will charge more slowly, tapering the charge rate until it reaches 100% and charging stops. It can take another hour or two after reaching 80% to complete the charging.
It’s all because of the Second Law of Thermodynamics. Anything that creates or uses energy does so with some loss. That lost energy is heat. So when you charge the phone it generates heat in the power source, heat in the charger circuit in the phone, and heat as the energy goes into the battery. The faster the charging, the more heat is generated. Likewise when you discharge the battery; not all of the energy from the battery gets to the circuits that use it. Some of it becomes heat.
If you use the cellular network for voice or data, converting energy to radio frequency signals is very wasteful; only about 30% of the energy that goes into the network components comes out as radio signals, the other 70% becomes heat. And signal strength matters; a 1 bar signal requires that the phone boost its transmitter power to maintain a connection, and it isn’t linear. 1 bar uses 10 times as much energy as 4 bars. You didn’t mention your phone model, but an iPhone 12 or newer (including SE 3rd edition) with a 5G signal uses about twice as much energy as an LTE signal, and 5G towers are still not as densely distributed as LTE, so the signal is likely to be weaker, compounding the problem.
Iphone 15 heats up
