It is recommended not to use the universal charge, which is very damaging to the mobile phone battery, the universal charge will not automatically power off after the battery is full, the universal charge current is fixed, and the battery will be plugged in, and will not stop. So the battery is fully charged. Some people will feel that compared with the original charger and universal charging, the battery will last longer with universal charging. However, the damage of overcharging to lithium batteries is very serious, and for a long time, the performance of the battery deteriorates quickly. After a period of time, it will be found that the battery is swollen and the battery life is not as good as before, which is precisely because of the overcharging of the universal charge.