Korea uses 220V at 60Hz with European-style round two-pin plugs (Type C and Type F). Travelers from the US, UK, Japan and most of Asia need a plug adapter; most modern electronics handle 220V without a voltage converter.
Check your charger for "100–240V" — if printed, you only need a cheap plug adapter, sold at any convenience store or Daiso for ₩2,000–5,000.
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