Attaching the Mag-Safe Battery Pack is a snap. Its compact, intuitive design makes on-the-go charging easy. The perfectly aligned magnets keep it attached to your iPhone 12 and iPhone 12 Pro or iPhone 13 and iPhone 13 Pro — providing safe and reliable wireless charging. And it automatically charges, so there’s no need to turn it on or off. There’s no interference with your credit cards or key fobs either.