The iPhone 11 can use a 20-watt charger.
The iPhone11 uses lithium battery, no memory effect, no need to use up the power and then complete charging, get the phone back to plug in the power supply can be charged normally, but it is recommended not to play games when charging, and use the original charger to charge.
Other aspects of normal charging use, it is recommended not to charge for a long time, the new iPhone11 has the function of overcharge protection for the mobile phone, it is recommended to unplug the mobile phone after full, it is best to have a complete discharge and charging process every week, that is, from red electricity to full charge.