Carrying a power bank on a Southwest Airlines flight is common, yet rules can feel unclear. This guide explains what to expect when you travel with external battery packs on Southwest.
You can bring your power bank safely by following specific capacity limits, placement rules, and airline expectations. These steps help you stay compliant and avoid delays at the gate.
| Aspect | Policy Detail | Documentation Required | Enforcement Notes |
|---|---|---|---|
| Capacity Limit | Up to 100 Wh allowed in carry-on baggage | Usually none for under 100 Wh | Check printed watt-hour rating on device |
| Larger Power Banks | 100–160 Wh requires airline approval | May need written confirmation | Boarding final call if not pre-approved |
| Quantity Limit | Maximum of two devices at 100 Wh or less | None typically | Additional units may be checked per agent |
| Usage During Flight | Do not use while in the air | N/A | Must remain off and stowed securely |
Know Southwest Power Bank Rules Before You Fly
Capacity Limits and Watt-Hour Ratings
Southwest Airlines follows TSA guidance that power banks under 100 Wh are permitted in carry-on luggage only. If your device shows 100 Wh or less on its label, you can generally bring it without extra paperwork. For power banks between 100 and 160 Wh, you must obtain written airline approval in advance. Any unit above 160 Wh is not allowed as carry-on or checked baggage.
Packing and Access Requirements
Place your power bank in your personal item or carry-on bag, never in checked bags, because lithium batteries pose safety risks in cargo holds. Keep it in a dedicated, easily accessible spot so you can remove it during screening. Security may request that you power it off and show that it is indeed a battery pack.
How Southwest Power Bank Rules Compare to Other Policies
Understanding how Southwest stands relative to legacy carriers helps you plan without confusion. The table below focuses on key policy contrasts that matter most to travelers who rely on external batteries.
| Policy Aspect | Southwest Airlines | Traditional Legacy Carrier | Practical Impact |
|---|---|---|---|
| Carry-on Only | Yes, no checked lithium batteries | Yes, same TSA rule | Pack power bank in your carry-on |
| 100 Wh Limit | Standard enforcement | Standard enforcement | Label reading is essential |
| Approval for 100–160 Wh | Required advance written consent | Often similar, varies by airline | Check directly with Southwest for current process |
| Quantity per Passenger | Up to two under 100 Wh | Commonly similar limits | More units may need special handling |
What to Expect at the Security Screening Area
Removing Power Banks for Inspection
Be ready to take your power bank out of your backpack during TSA screening. Keep it in a place where you can grab it fast, which helps keep the security line moving smoothly. Some high-capacity units may be swabbed for additional testing, but this is routine rather than an indication of a problem.
Gate Check and Boarding Considerations
Once you board, keep your power bank with you in the cabin for safe access and to prevent loss or damage. Do not use it while the aircraft doors are closed or during critical phases of flight as instructed by crew. If you have a larger model needing pre-approval, bring any email or documentation from Southwest to show if asked.
Key Takeaways for Traveling with Power Banks on Southwest
- Always pack power banks in carry-on luggage, never in checked bags
- Verify the watt-hour rating on the device label before arriving at the airport
- Limit yourself to two power banks at 100 Wh or less without special approval
- Secure the device in a dedicated slot to facilitate quick screening
- Contact Southwest in advance for any unit between 100 Wh and 160 Wh
- Keep the power bank off and unused throughout the entire flight
FAQ
Reader questions
Can I check a power box in my checked bag on Southwest?
No, you must keep power banks in your carry-on baggage because checked bags are not monitored for lithium battery safety during flight.
Do I need to tell Southwest in advance if my power bank is 150 Wh?
Yes, contact Southwest ahead of time to request approval for power banks between 100 and 160 Wh and bring written confirmation on board.
Can I use my power bank while the plane is in the air?
No, you must keep power banks turned off and stowed during all phases of flight; using them is not permitted.
Does the watt-hour rating include the built-in cable?
The rating applies to the battery itself, not any attached cables or adapters, so check the label on the power bank housing.