Although there were no changes in battery capacity, Apple gave its Watch 7 a novelty upon its launch. Exclusively, this smartwatch can be charged quickly.

This capability was useful to users, at least until watchOS 8.5. Since this update, this ability has failed and user complaints have increased, without Apple acknowledging the problem.

Apple Watch 7 problems
when apple Presented The Watch 7 revealed in September last year that it could charge much faster than previous models.  The brand promised that they could charge from 0 to 80% in just 45 minutes, which pleased users.
It now appears that this ability has issues, judgment of complaints From users who accumulate.  The fast charging ability has stopped working and the values ​​are now achieved at the normal charging values.
Fast Charging Failed
at Indicate complaints That since watchOS 8.5 has been released, loading has slowed, at very low values.  Some users have reported that since they installed this version, the fast loading only grows by 5% every 15 or 20 minutes, which is very slow compared to the normal one.
There are more complicated cases where users are seeing that the Apple Watch 7 charging slows down even more.  They report that they can only charge 5% every hour.  There are those who report that in these cases, removing the smartwatch from the charging base and putting it back in again eliminates the problem.

Crash has arrived with watchOS 8.5
Although the problem was initially related to some specific chargers, this idea was quickly disproved.  Reports have shown that even with Apple chargers, this problem appears on the Apple Watch 7.
As usual, Apple still hasn't acknowledged the Watch 7 issue and hasn't even come up with a solution to it.  The reason is likely to be watchOS 8.5 itself, something that Apple will be able to solve in the next update, which targets its smartwatch.