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MrInquestador

macrumors regular
Original poster
Nov 14, 2015
229
52
I have the 29W adapter with the USB type C cable for my iPhone X. The first time I used it, it charged the phone from 10% to 85% in one hour and charged it completely for an hour and 45 minutes.

I've noticed twice now that charging got slower. After an hour, it charges my phone from 10% to 80% only and takes 2 full hours to completely charge.
 
About the same as my experience. Charging from 80% to full do slow down gradually to the same rate as the stock 5W charger. Having your phone switched on, connected to phone network and a few apps running in the background can slow the charging even more.
 
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