I charge my Apple Watch everyday before I go to bed. So every morning, I got a fully-charged Apple Watch. When the Apple Watch is charging, I choose do-not-disturb mode, other than airplane-mode. Because I sync modes between Apple Watch and iPhone. If I choose airplane-mode, I need to enter password twice, one for iPhone, one for Apple Watch. I have got my Apple Watch for 7 days, since April 24th. So I have charged it 6 times. 2 of the 6, I feel the watch and the magnetic charger connector part are very warm. The other 4 times, the temperatures are normal. I do not know why. I guess it maybe I did not match the surface fully between the magnetic charger connector to the back of the Apple Watch. Does anyone encounter the same problem?