Because the voltage is unstable, when a large current is suddenly passed, it will cause burning. It may also be caused by the charger, which may cause burning when the current standard of the charger is not the same. When the phone charger has a burnt smell, it is necessary to power off immediately to avoid damaging the phone.
Note 1, do not charge after a full charge if the phone is fully charged but still connected to the power supply, it will affect the battery life. That's because once the phone reaches 100% charge, it goes into \"trickle charge\" mode - remaining fully charged. If you continue to charge, the mobile phone battery will be affected by current, and some chemical components will be destroyed, affecting the efficiency of use.
2, do not charge to 100% In fact, lithium batteries do not need to be fully charged and then power off. This is because after the phone is fully charged, the voltage inside the battery will rise, increasing the battery burden. Therefore, mobile phone charging can be completely plugged in and out, as long as it can maintain normal use.