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Unlike the Apple Watch Series 7, it can only be charged with its own cable.
It's not directly universal.
The Apple Watch has the ability to charge wirelessly, making it the first Apple mobile device to do so. The Apple Watch uses a MagSafe-style wireless charger. It magnetically attaches to the back of the Apple Watch and is then charged inductive. Although it works in the same way as existing wireless chargers on the market, wireless charging can still bring a lot of convenience for a device that may need to be charged every day.
Different, because the voltage is different, I watch charging head is five volts ri phone charging voltage is seven volts, so the different voltage is different, can not be normal general
The same, the data cable is different.
The charger is composed of a charging cable and a power adapter. Apple phone charging power adapter, and Apple Watch is the same, the two can be universal. But the magnetic charging cable used by the Apple Watch is completely different and not universal with the Apple phone.