It is possible to continue charging overnight after a quick full charge, but it will wear out the battery.
There is no impact, now the mobile phone is equipped with lithium-ion battery, the mobile phone will automatically power off after being full of electricity, fast charging the mobile phone for a night will not affect the mobile phone.
How many w fast charges does the iphone12 support
iphone12 support 20w fast charge, iphone12 all series support PD fast charge, Qi wireless charging, also support MagSafe wireless charging, users can use 20w fast charger for 30 minutes to charge up to 50% power.