Does MagSafe charge slower through a regular phone case?

Wireless charging works by magnetic induction. If you put a thick, non-magnetic case between your iPhone and the charger, it increases the distance between the induction coils. This gap affects the magsafe case charging speed.

A distance increase of even 2mm can slow charging by 30% or convert energy into heat, causing your phone to throttle.

To solve this, a proper MagSafe case uses built-in magnetic rings that align the charging coils perfectly, reducing the gap and maintaining the maximum 15W wireless charging rate.