Southwest Airlines allows passengers to use portable chargers on board to keep devices powered during flights. Understanding the portable charger policy helps you travel confidently without worrying about unexpected power loss.
Below is a quick reference that outlines the most important rules you need to know before you fly with a power bank.
| Item | Rule | Limit | Notes |
|---|---|---|---|
| Portable charger type | Lithium-ion or lithium-polymer power bank | Allowed | Must be in working condition, no damaged units |
| Capacity limit | Rated watt-hours (Wh) | Under 100 Wh | No single power bank may exceed this threshold |
| Quantity per passenger | Maximum number of devices | Up to 2 | Each must comply with size and capacity rules |
| Carry-on requirement | Must be in carry-on baggage | N/A | Never pack power banks in checked bags |
| Security screening | Remove from case, separate bin | N/A | Be ready for visual or swab testing at checkpoints |
Carry On Rules For Portable Chargers
When you fly with a portable charger, it must remain in your carry-on bag throughout the journey. Southwest Airlines follows TSA regulations that prohibit power banks in checked luggage due to fire risk. Keeping your device with you ensures easier access to power and simplifies screening at security.
Packing And Access Tips
Place the power bank in an easy-to-reach pocket or dedicated slot in your carry-on. Avoid burying it under clothing or heavy items so agents can quickly inspect it. Be prepared to remove the power bank from its case during the X-ray process if required.
Size And Capacity Limits You Need To Know
Southwest Airlines enforces strict size and capacity limits to maintain safety on board. Portable chargers under 100 watt-hours are generally accepted, and most consumer power banks fall within this range. Knowing the exact watt-hour rating prevents surprises at the gate or during screening.
How To Calculate Watt-hours
Check the label on your power bank for the milliampere hour (mAh) and voltage (V) ratings. Use the formula Wh = (mAh × V) ÷ 1000 to determine compliance. If your device is rated above 100 Wh but under 160 Wh, you may need prior approval, and units over 160 Wh are not permitted.
Charging Devices During The Flight
You are allowed to use your portable charger while in the air, but it must be connected properly to your device. Keep cables organized and avoid leaving loose wires that could interfere with cabin operations. Flight attendants may ask you to pause charging during critical phases of flight for safety reasons.
Best Practices For In Flight Use
- Use certified cables that fit securely into your device and the power bank.
- Monitor the power bank for unusual heat or swelling during use.
- Keep the power bank in sight and within easy reach under your seat.
- Avoid sharing cables or power sources with unknown passengers.
Key Takeaways For Flying With Portable Chargers
- Always carry your portable charger in your carry-on, never in checked baggage.
- Verify that the power bank is under 100 Wh and not physically damaged before travel.
- Limit yourself to two power banks per passenger to simplify screening.
- Keep cables organized and be ready to remove the charger during security checks.
- Monitor your device while charging and follow crew guidance during critical flight phases.
FAQ
Reader questions
Can I bring a 20000 mAh power bank on Southwest flights?
Yes, a 20000 mAh power bank is typically allowed if its watt-hour rating is under 100 Wh and it travels only in your carry-on baggage.
Do I need to declare my portable charger at check in or security?
No formal declaration is required, but you must notify security officers that you have a power bank and place it in a separate bin for screening.
Can I use my power bank while the plane is taking off or landing?
You can usually keep the power bank connected during takeoff and landing, but follow any instructions from flight attendants and avoid use if specifically requested.
What happens if my power bank is damaged or starts to smoke?
Immediately notify a flight attendant, move away from flammable items, and follow crew instructions for handling lithium battery incidents.