With a wireless power bank, you can charge all smartphones that support it wirelessly. Place your smartphone on the power bank and it automatically charges, so you don't have to bring any cables. Every power bank with wireless charging also has 1 or more USB ports. You can charge devices that can't charge wirelessly with these, like your earbuds. All new iPhone models and Samsung S series devices support wireless charging and work with wireless power banks. You can only charge Samsung A series devices wired, for example.