There are two types of connection types used for iPhone / iPad USB charging cables:
- All newer iPhone / iPad models (iPhone 5 & iPad 4 onwards) connect to a USB charging cable via lightning connector.
- Older iPhone models (iPhone 4s & iPad 3 and earlier) connect to a USB charging cable via 30-pin connector.
Any accessories designed to work with a 30-pin connector, such as a car charger, will require an Apple-approved adapter.