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Frequently Asked Questions
My iPhone 13 Pro Max, 13 Pro, 13, 12 Pro Max, 12 Pro, 12, 11 Pro Max, 11 Pro, 11, SE, X, XS, XS, Xr Max charges very quickly up to 80% and then slowly. Why?
All iPhones with fast charging (Power Delivery with tizi flip ULTRA or Apple Lightning to USB-C cable) charge very quickly up to 80%. From around 80%, the iPhone's operating system generally reduces the charging speed. How much this reduction is depends on the device's operating temperature. The iPhone further reduces the charging function if it generates a lot of heat.
A cold environment or targeted cooling of the iPhone (e.g. removing it from the case, placing it on a cold surface or even using cooling packs) then helps to continue fast charging even from 80%.


