The original iPhone (iPhone 1st generation) uses a 30-pin dock connector for charging and syncing. This is different from the Lightning connector used in later iPhone models starting from the iPhone 5. The 30-pin connector was Apple's standard before the introduction of the Lightning connector in 2012

. To summarize:

• iPhone 1 (original) uses a 30-pin dock connector for charging.
• Later iPhones (from iPhone 5 onward) use the Lightning connector.
• Current iPhones include USB-C to Lightning cables for fast charging, but this is not applicable to the original iPhone

Therefore, if you have an original iPhone, you need a charger with a 30-pin dock connector, not a Lightning cable.