It looks like Apple wasn’t extra cautious when it warned in the iPhone 12’s new MagSafe charging system could affect not only magnetic stripe cards and RFID tags, but also “interfere with medical devices” like pacemakers and defibrillators. Why?

All of those could affect the operation of “medical devices,” i.e. pacemakers, and a cardiologist from the Henry Ford Heart and Vascular Institute put Apple’s warning labels to the test. Dr Singh checked how the MagSafe components are affecting the work of implantable defibrillators, and by and large found that the defibrillator safety switch detected the iPhone 12’s magnets, and shut its functions down indeed: