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7.5W will always charge faster compared to 5W. Not related to iOS version as such.
 
7.5W will always charge faster compared to 5W. Not related to iOS version as such.
Back when the Belkin 7.5w came out last year, my iPhone X would take 3h30m to fully charge while 2h30m using the 5w cable charger.
 
Back when the Belkin 7.5w came out last year, my iPhone X would take 3h30m to fully charge while 2h30m using the 5w cable charger.

Then the charger must’ve been faulty, keeping in mind the input is following the recommended voltage throughput.
 
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