Manufactures have been scaling back the included extras that come with hardware for a while now - you won't find included headphones or cases with any of the latest flagship phones. But you can generally rely on getting a USB cable and a wall-wart charger at least. Such is the case with the current Android Wear devices, the LG G Watch and the Samsung Gear Live. But if you have one, you'd better hold onto that charger like it's made of gold, because it might as well be. At present there doesn't seem to be any way to get a replacement.