This article will provide some useful information on this issue.
If you find your charger slightly warm, this is normal for any phone charger. Your charger converts AC power from the outlet into DC power for your phone, and it generates heat in the process.
To perform the AC/DC conversion, the charger uses an electrical component called a transformer. The transformer generates heat due to the frequent conduction process and also from eddy currents and other losses, which are side effects of how the transformer operates. Generally, the more current a transformer provides, the more heat it will generate.
Under normal circumstances, a phone charger may feel slightly warm to the touch, and that’s fine – it’s operating as designed. But if it becomes not just warm or unusually hot suddenly when it wasn’t warm before, your charger may have a problem.
If your charger gets hot to the point where it feels uncomfortable to hold or touch, that is a clear sign that something is wrong. This could be due to an internal fault within the charger itself or an issue with the connection between the charger and the outlet. A genuine, high-quality charger with a protective circuit will automatically shut off if there is a fault. However, this circuit may malfunction, or you may be using a low-quality or counterfeit charger.
If your charger is uncomfortably hot, unplug it from the outlet and look for any visible signs of dirt or obstructions on the prongs that plug into the wall socket. Additionally, check to ensure that the charging port on your phone is clean and inspect the USB port on the charger itself (if applicable) for signs of dirt or lint.
Once the ports are clean, try again, and if the port is still hot, try using a different cable to see if the issue persists.
One reason a charger gets hot while charging a phone is that it is made of poor-quality or counterfeit components. These parts do not comply with safety standards and regulations that keep us safe.
If you purchase a faulty charger, request a refund and consider buying a new charger directly from your phone manufacturer, such as Apple or Samsung.