A snap is used to secure the MagSafe Battery Pack. On-the-go charging is made simple by its small and user-friendly design. Additionally, its precisely positioned magnets secure it to your iPhone, enabling dependable and secure wireless charging. When used with a 27W or higher charger, such as those included with MacBooks, the MagSafe Battery Pack can charge even more quickly. And for up to 15W of wireless charging when you need one, simply plug in a Lightning cable.