The Apple Watch S7\/S8 can charge from 0% to 80% in about 45 minutes.
The Apple Watch Ultra, which has a larger battery, takes longer, charging from 0% to 80% in about an hour.
However, it should be noted that to achieve this \"fast charging\" requires the use of a separate USB-C magnetic fast charging cable, and the base is replaced with an aluminum alloy shell, which is priced at 283 yuan (one meter).