A plug adapter changes the shape of the connection; it does not make a 110 V appliance safe on Korea’s 220 V supply. Read the input label on each device before buying travel accessories. You may already own most of what this trip needs.
This checklist is based on official electricity and airport guidance checked October 4, 2026. It is not a product test or a list of items you must purchase.
Start with what you own
| Item | Bring it when… | Check before buying anything else |
|---|---|---|
| Phone/laptop charger | Its input rating supports the local supply | Voltage, frequency, plug and any grounding requirement |
| Power bank | You need it and the airline accepts that exact battery | Printed Wh rating, condition, quantity and cabin rules |
| Existing mobile plan | Its Korea allowance and cost fit your trip | Data limit, calls, roaming charges and activation |
| Walking shoes | They are comfortable on stairs and wet surfaces | Do not make the trip a first wear of unfamiliar shoes |
| Small day bag | It holds tickets, water and a dry layer | Your booked attractions’ bag/storage rules |
| Usual skincare | It already suits you | Travel-container limits and package instructions |
Read the charger’s input label
Korea Tourism Organization lists 220 V at 60 Hz, with round-pin outlets. Check your actual charger rather than assuming every new device is dual-voltage.
- Label says 100–240 V, 50/60 Hz: the voltage range includes Korea. You still need the appropriate plug connection and must follow the manufacturer’s instructions.
- Label says only 110–120 V: a shape-only adapter is insufficient, even if the appliance is new. For a high-power item such as a hair dryer, using a suitable local appliance is often simpler than carrying conversion equipment. Ask the manufacturer before using a converter.
- Label is missing or unclear: identify the device and obtain its specifications before connecting it.
Check grounding and the adapter’s current/power rating too. A USB port on a travel adapter does not establish that its mains socket converts voltage. Ask your accommodation whether it provides the appliance you need before packing a second one.
A power bank is cabin baggage, with additional limits
Incheon Airport’s current restricted-items table lists power banks of 160 Wh or less, up to two per person, with airline approval needed above 100 Wh. They must not go in checked baggage. The airport’s notice effective April 20, 2026 also requires short-circuit protection and prohibits onboard use, charging and overhead-bin storage.
Confirm the rule with every operating airline, including connections. Keep the battery’s rating readable and follow crew storage instructions. An online listing calling a battery “airline-safe” is not approval for your itinerary.
Label-reading example: 10,000 mAh at a nominal 3.7 V corresponds to 37 Wh: 10,000 ÷ 1,000 × 3.7. Use the manufacturer’s marked rating and airline guidance; do not guess the voltage from the charger’s USB output. Quantity, condition and the flight’s rules matter as well as capacity.
Choose connectivity before a second gadget
Use our Korea eSIM and airport SIM comparison to check an unlocked phone, supported model, activation deadline and voice/SMS needs. A data-only eSIM may be enough for maps and messaging, but it is not necessarily a Korean outgoing-call service or identity-verification number.
For two people considering pocket Wi-Fi, compare the complete rental and return cost with two compatible data plans. Account for whether you will separate during the day and who carries the device. A shared connection can become inconvenient when one person leaves with it.
Save the hotel’s Korean address, confirmations and a route screenshot before flying. Navigation and translation apps help, but a saved address remains useful when mobile data fails. Do not assume a domestic shopping or taxi app accepts every overseas card or phone number.
Pack around the first day
Put required travel documents, essential medication according to its instructions, a permitted charger/battery and the first night’s address where you can reach them. Check airline liquid rules before repacking toiletries. Bring a small amount of your usual products rather than planning to replace your entire routine on arrival.
For clothing, choose layers and shoes for the forecast and your actual activities. A palace walk, mountain hike and restaurant evening create different needs. For rain, our weather and route guide explains when to shorten a walk and when an alert should stop the outing.
One final list before checkout
Write already owned / provided by accommodation / genuinely missing beside each item. Price only the missing column. Include airline baggage charges if an extra purchase changes your bag allowance. The useful packing list is the one that makes your trip work with fewer avoidable purchases.