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 or iPhone 12 Pro — providing safe and reliable wireless charging. And it automatically charges, so there’s no need to turn it on or off. While your MagSafe Battery Pack is charging, the status light might flash. If it flashes green, your battery pack is fully charged. If it flashes amber, your battery pack might need more time to charge.