Here is another power bank that lets you use your iPhone longer. The MChaos iPhone 15 Power Bank has a wearable design, 5000mAh battery, and 20W fast charging. It comes with a retractable cable. You can easily attach it to backpacks, and lanyards.
The cable measures 0.7 meters and can be used to charge your phone or the power bank. You can rely on MChaos to charge your iPhone 15 to 50% in 30 minutes. The device weighs only 6oz, so you can easily take it with you anywhere.[where to get it]