Quick answer: A USB-C wall adapter can charge both new and older iPhones when you use the correct cable. iPhone 15, 16 and 17 use USB-C to USB-C; iPhone 14 and earlier use USB-C to Lightning. The wall adapter can be shared—the phone-side connector cannot.
Compatibility table
| Phone | Port | Cable to USB-C adapter | Can share same adapter? |
|---|---|---|---|
| iPhone 15/16/17 | USB-C | USB-C to USB-C | Yes |
| iPhone 14 and earlier | Lightning | USB-C to Lightning | Yes, with different cable |
Adapter compatibility vs cable compatibility
“Backward compatible” can be confusing. The adapter negotiates a safe supported power profile, while the physical cable must fit the phone. A C-to-C cable cannot plug into a Lightning iPhone.
Browse USB-C wall chargers | Browse cables
Upgrading from an older iPhone
Keep the USB-C wall adapter if it is compatible and in good condition, but add a USB-C to USB-C cable for iPhone 15 or later. Check the adapter wattage if faster charging is important.
Frequently Asked Questions
Can my old USB-C adapter charge iPhone 17?
Often yes, with a C-to-C cable, but speed depends on the adapter’s supported output.
Can I use my iPhone 17 cable on iPhone 14?
No. The phone-side connector is different.
Do all current iPhones use USB-C?
iPhone 15 and later families use USB-C; iPhone 14 and earlier use Lightning.
This guide is informational and uses the current iSmartHub catalog. Confirm your exact device model, plug type and connector before ordering.
