Attaching the MagSafe 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.At your desk and need a charge? Just plug a Lightning cable into the MagSafe Battery Pack for up to 15W of wireless charging. Short on time? With a higher than 20W power adapter, you can charge both the MagSafe Battery Pack and your iPhone even faster. And you can track the status of your charge on the Lock Screen.Recommended:? 20W or higher USB-C Power Adapter and USB-C to Lightning Cable