Originally Posted by mattdb
Yeah, that is what I thought, I tried some others and am getting the same result. I used my charger for my Galaxy Note 10.1 and it charged just fine.
Even though you found a charger that is fast charging it, I am wondering if maybe it is safer not to do this. The fact that the watch came with a 0.5A charger would suggest it may have issues charging fast (for example, over-heating concerns which may shorten the life of the watch). I could be completely wrong, but the difference to Samsung in cost with a 0.5A or 2A charger is probably pennies...so they must have done this intentionally.