Why is the charging speed of mobile phone slow in winter?

Mobile phones also have a temperature limit. If it exceeds a certain temperature, the mobile phone will charge slowly, and it is more likely that it will not be charged at all.

When charging at low temperature, the mobile phone software will reduce the charging current to protect the battery. If you want to charge your mobile phone or improve the charging speed, you can move it to a warm place indoors to charge it, or wait for it to heat up before charging.