Whether a phone case slows down wireless charging depends entirely on the case material and thickness — here's what actually matters.
Short Answer
Thin cases (under 3mm) in silicone, TPU, or leather generally don't noticeably slow wireless charging. Thick cases, cases with metal components (rings, credit card holders, kickstands), or cases over 5mm thick can significantly reduce or block wireless charging.
Why Case Material Matters
Wireless charging works via magnetic induction between coils in the charger and the phone — metal between them disrupts this field, while thick material simply increases the distance the magnetic field has to travel, weakening the connection.
Materials Ranked by Wireless Charging Compatibility
- Best: Silicone, TPU, thin leather — minimal interference
- Okay: Polycarbonate/hard plastic, if not too thick
- Problematic: Cases with metal rings, kickstands, or card holders on the back
- Worst: Battery cases, thick wallet cases, cases with metal plates
MagSafe Cases Specifically
Genuine MagSafe-compatible cases are designed with the magnetic ring integrated in a way that doesn't block charging — they're built and tested for this specifically, unlike generic cases that happen to be MagSafe-shaped.
How to Test Your Current Case
Try wireless charging with the case on vs off. If charging is noticeably slower or doesn't start at all with the case on, the case is the culprit.
For a case that won't interfere with MagSafe charging, see our genuine Apple MagSafe cases.
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