All the Apple Products You Should Keep Away From a Pacemaker Share Image: Apple Many Apple fans were overjoyed to see MagSafe charging come to the iPhone 12, that is until we learned it could potentially interfere with a pacemaker. Researchers from the Heart Rhythm Society published a study earlier in the year showing evidence that the magnet within an iPhone 12 is powerful enough to disrupt an embedded medical device like a pacemaker. The American Heart Association backed up these findings with a second study that revealed the iPhone 12 Max had an impact on three different brands of pacemakers and ICDs.