I've had one of each series of Apple watches, but this one seems very slow to charge in comparison. I've had it charging for 3 1/2 hours and the battery has only gone from 20% to 88%. I wear it sleeping, so daytime charging speed is important. I've tried 2 different charging cords and 2 different direct to wall outlets. I have tried a reset and power off, power on already. BTW what happened to the resync option? When things got out of whack, it only took a few seconds to empty the watch items and resync them. Now it seems like the only option is a total Reset, which takes quite a while and you have to input some settings again - like your ApplePay cards. Battery life seems OK so far though.