①,? If the USB port is not urgently needed, try not to use the USB socket to charge the phone, the reason is that most USB sockets are basically similar to the parameters of the mobile phone charger, \"but the actual measurement and the difference on the socket is a lot\
No, the socket is generally 2A, and now the mobile phone is fast charging, 2A charging speed is too slow, and the original charger of the mobile phone has a protective effect on the mobile phone