Q1: Can the magnet hold the watch in place?
A1: Yes, the magnet is strong enough to keep the watch in the correct position for charging.

Q2: Does the charging cord fit a C or an A adapter?
A2: The charging cable is compatible with the C-port adapter, the adapter is included.

Q3: Does this charge work with apple watch 8 and ultra?
A3: Works well with Apple Watch 9. It takes about 2.5 hours to fully charge.

Q4: Do it stop changing when watch is fully charged to avoid overheating?
A4: After fully charged, the charging will stop, but the watch will still be attached to the charger, and the watch will not overheat due to the stop charging.

2-in-1 iWatch Fast Charger Cable.
It can Charger i watch and other Lightning device at the same time.
Wireless Charging for iWatch Ultra 2/Ultr/8/7/6/SE/5/4/32/ 1(38mm,40mm,42mm,44mm)
Fast Charger for Apple Watch/iPhone/iPad.
As follows
USB C to Lightning Cable for for iPhone 14/ 14 Plus/ 14 Pro/ 14 Pro Max/ 13/ 13 Pro/ 13 Pro Max/ 13 Mini / 12 / 12 Pro/12 Pro Max/ 12 Mini/ SE 2020/ 11/ 11 Pro/ 11 Pro Max/ XS/ XS Max/ XR/ X/ 8/ 8 Plus