Nikon operates factories all across the globe and each operate to the same high standard. While individual cameras are marked with their country of manufacture we can't make a blanket statement about which camera is produced where.
The Battery charger for the COOLPIX s550 is the MH-64. The AC Adapter is the EH-62E and is use to provided power continuously for extended periods, not to charge the battery. Under any circumstances, use another make or model of AC Adapter.