The MagSafe Battery Pack is now available to order from its maker's website. It is a new form of wireless power bank custom-made to snap onto the back of an iPhone 12-series unit using the devices' new proprietary magnetic charging system. However, this novelty and convenience comes with a typically Apple price-tag.
https://www.notebookcheck.net/Apple-executes-a-stealth-launch-for-the-MagSafe-Battery-Pack.551063.0.html