Phone Overheating While Charging, When to Worry and What to Do
Some warmth while charging is normal, especially with fast charging, gaming, or video calls at the same time. Overheating is different: the phone is too hot to hold comfortably, it shows a temperature warning, it pauses charging, or it shuts down. This guide sorts one from the other and tells you what to do.
Warm or overheating? A quick check
Normal: warm during fast charging, gaming, navigation, video calls, or the first day after setting up a new phone.
Overheating: too hot to hold, a temperature warning on screen, a dimmed screen, the camera flash disabled, charging paused or stopped, or the phone shutting itself down.
Danger: swelling, a bulging back or lifting screen, a chemical or burning smell, hissing, or smoke. See the warning box below.
Phones protect themselves: long before it gets dangerous, a phone slows down, pauses charging, and if it has to, switches itself off. On iPhone, you may see the message “Temperature: iPhone needs to cool down”. Charging resumes automatically after the phone cools.
What to do right now
Unplug the phone and take the case off. A case traps heat while charging. Move the phone into the shade and let it cool at room temperature on a hard, flat surface.
Stop using it while it charges. Games, video recording, navigation, and video calls generate heat at the same time charging does. Close demanding apps.
Never use the fridge or freezer. Rapid cooling can cause condensation inside the phone, which is worse than the heat. Room temperature and airflow are enough.
Check the charger and cable. A damaged cable or a cheap, uncertified adapter can cause excess heat. Use the charger that came with the phone or a reputable certified one, and stop using any cable with exposed wires or a burned connector.
Keep it out of the heat. Apple says iPhones work best in surroundings between 0 and 35 degrees C, and temperatures above 35 degrees C can permanently damage battery capacity. Never leave a phone charging in a hot car, on a sunny dashboard, or under a pillow or blanket. Do not sleep on a phone, adapter, or wireless charger while it is connected to power.
Check for a runaway app. Open Settings, Battery and look for an app with high background use. Update it, restrict its background activity, or remove it if the heat started after installing it.
Charge more slowly for now. Switch from fast charging to a standard charger, or charge wirelessly at a lower rate, until you know the heat is under control.
Stop using the phone immediately if you see danger signs. Swelling or a bulging battery, a screen or back cover lifting, smoke, hissing, leaking, or a strong chemical smell mean the battery may be damaged. Stop using and charging the device, do not press, puncture, bend, or open the battery, keep it away from anything flammable, and arrange professional help. Never open a phone battery yourself. If there is smoke or fire, put your safety first and contact emergency services.
If it keeps overheating
If the phone repeatedly gets too hot to hold while charging, even with a good charger, a cool room, and no demanding apps, the battery or the charging circuit may be failing. Check battery health: on iPhone in Settings, Battery, Battery Health; on many Android phones in Battery or Device care settings. A battery health reading around 80% or lower, or heat while the phone sits idle, points to a battery that needs professional replacement.
Common questions
Is it normal for a phone to get warm while charging? Yes, some warmth is normal, especially during fast charging. Apple and Samsung both say a phone can become slightly warmer while charging. It becomes a problem when the phone is too hot to hold, shows a temperature warning, or pauses charging to protect itself.
Why does my phone stop charging when it gets hot? That is heat protection working as designed. Phones slow or pause charging when they get warm to protect the battery, and charging resumes automatically after the phone cools. A charge that stops at 80% on a warm day is usually heat protection, not a broken charger.
Can I put my phone in the fridge to cool it down? No. Rapid cooling can cause condensation inside the phone, which can damage it. Let it cool at room temperature in a shaded, ventilated place, with the case off and the charger unplugged.