Will there be any problem to iPhone 12 Pro if a 10 W wireless charger is charging 100% in 4/5 hours?
Will there be any problem to iPhone 12 Pro if a 10 W wireless charger is charging 100% in 4/5 hours?
iPhone 12 Pro, iOS 14
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No issues expected.
iPhone 8 and later can be rapid-charged with chargers rather higher-wattage than the old iPad 10 watt and 12 watt chargers.
Fast charge your iPhone - Apple Support
Apple specifically lists the 10 watt and 12 watt chargers as permissible with iPhone, too:
Charge your iPhone with an iPad or Mac notebook power adapter - Apple Support
As with charging in general, ensure that the iPhone doesn’t get too hot when charging—some cases can insulate, for instance—but otherwise expect no issues with 10 watt chargers.