Charging the phone overnight does not damage the battery. When the battery is full, the protection circuit inside the phone will stop charging the battery.
Many people have the habit of playing mobile phones at night, charging them overnight after playing. Many people generally do not charge at night, afraid of charging a night is very harmful to the battery
In fact, charging the phone for a night is basically no harm to the battery, because today's smart phones have the corresponding PMU, that is, battery management program. This must meet two conditions, one is to plug in the power supply, and the other is that the mobile phone system gives the control signal that needs to be charged.
When it is full, it cuts off the charge, even if it is connected to the charging cable, it does not charge. When the standby power consumption to a certain extent, the PMU will give the mobile phone trickle charging, charging at a very low current, and the cycle is repeated. Therefore, there is no harm to the battery at all
In fact, the biggest harm to the mobile phone is the battery is exhausted and then charged, through this charging curve can be seen that low power charging is the slowest, why? Because this is the PMU protection scheme for the battery.
The way to improve battery life is to keep the phone's battery at 30% to 50% low, until two hours before going out, and then full to 100%. But there are still a lot of people who say that the phone is just for use. So I have to feed him every day? So if you are more concerned about power loss, take the above method, if you feel that it does not matter, it is good to use as you charge.
It doesn't hurt the phone. Now cell phones are memory batteries, fully charged will automatically power off.