1, the usb interface charging on the socket and the charger are the same, the difference is that the protection function is not perfect with the mobile phone, there is no difference in use, but the mobile phone charger has a fast charge function, but the socket USB port does not have the function.
Relatively speaking, the built-in USB interface on the socket, the highest voltage can reach 9V, and can support 18W fast charge, at present, the charging voltage of most smartphones is 5V, but the charging current will have different differences.
Only regular charging, no fast charging. We now see that the power strip will take away several usb ports, which have a current capacity of 5 volts 2 amps. The same parameters as earlier mobile phone chargers, 3.7-volt rechargeable batteries are safe to charge. Because the battery of the mobile phone is 3.7 volts, it is the same as the mobile phone charger, but it cannot be charged fast.