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Southwest Airlines Lithium Ion Battery Policy: What You Can & Cannot Carry

Southwest Airlines lithium ion battery policy addresses how passengers can transport battery-powered devices safely while flying. This guide explains the rules for carry-on and...

Mara Ellison Jul 31, 2026
Southwest Airlines Lithium Ion Battery Policy: What You Can & Cannot Carry

Southwest Airlines lithium ion battery policy addresses how passengers can transport battery-powered devices safely while flying. This guide explains the rules for carry-on and checked bags, along with tips for protecting your devices and complying with updated guidelines.

Review the table below for a quick reference on how Southwest handles lithium ion batteries on board, including capacity limits, packaging rules, and approval conditions.

Battery Type Carry-On Rules Checked Bag Rules Approval & Documentation
Spare Portable Batteries Allowed in carry-on only, must be individually protected Not permitted Passenger declaration if over 100 Wh
Installed in Devices Allowed in carry-on and checked bags Allowed with crew notification No special approval for standard devices
Batteries Over 100 Wh Allowed with crew approval for mobility or medical devices Generally not permitted Medical or mobility documentation recommended
Power Banks Allowed in carry-on, must show capacity rating Not permitted No special approval under 100 Wh

Lithium Ion Battery Rules for Carry-On Luggage

When you board Southwest with personal electronics, keep lithium ion batteries in your carry-on luggage whenever possible. This reduces the risk of damage and makes it easier for crew members to monitor battery conditions during flight. Devices in checked bags are more exposed to pressure changes and possible damage, which can affect battery safety.

Southwest requires that all spare lithium ion batteries be transported in carry-on bags only. Each spare battery must be placed in a protective case or with its terminals taped to prevent short circuits. The airline may request removal of loose batteries from bags during screening to ensure compliance with safety standards.

Passengers traveling with high-capacity power banks or medical equipment should arrive early to allow time for additional screening. Being ready to explain the purpose and capacity of each battery helps streamline the process and reduces potential delays at the gate.

Lithium Ion Battery Rules for Checked Bags

Lithium ion batteries installed in electronic devices are usually allowed in checked baggage, but loose spare batteries must remain in carry-on luggage. This distinction helps the crew manage risk and respond quickly if a problem arises during the flight.

If you need to check a device with a non-removable battery, inform a gate agent before the bags are loaded. For devices with removable batteries, take the battery out and keep it with your other carry-on items to stay within policy and avoid damage.

Southwest recommends using original retail packaging or protective sleeves for battery-powered devices. Proper packaging reduces the chance of accidental activation and protects both the battery and surrounding luggage from damage. h2>Medical and Mobility Device Exceptions

Passengers who rely on mobility or medical equipment may carry lithium ion batteries that exceed standard size limits. These exceptions are designed to ensure that travelers with essential devices retain full access to battery power during their trip.

Southway encourages passengers with specialized equipment to notify the airline in advance or at the gate. Providing documentation, such as a medical tag or prescription, can simplify the screening process and clarify the purpose of larger or multiple batteries.

Crew members are trained to handle these situations respectfully and safely. Working with airline staff and following their instructions helps maintain a smooth travel experience while addressing both safety and accessibility needs.

How Southwest Lithium Ion Battery Policy Affects Flight Operations

Clear battery policies help Southwest maintain reliable operations and minimize disruptions caused by overheating or damaged devices. Consistent rules across flights reduce variance in how crews handle battery-related incidents and respond to potential hazards.

Training programs ensure that gate agents and flight attendants understand how to inspect, document, and escalate battery-related issues. This structure supports faster decisions at the gate and more predictable handling during in-flight emergencies.

Passenger compliance with battery rules also contributes to smoother boarding and turnaround times. When travelers follow packaging and notification guidelines, airline staff can focus on safety checks rather than managing avoidable incidents.

Key Takeaways for Southwest Lithium Ion Battery Travel

  • Always carry lithium ion batteries in your carry-on luggage when possible.
  • Keep spare batteries in protective cases and avoid loose terminals.
  • Follow capacity limits and declare high-capacity batteries at the gate.
  • Notify airline staff about medical or mobility devices before boarding.
  • Use proper packaging to protect devices and reduce the risk of damage.
  • Arrive early at the airport to allow time for additional screening if needed.

FAQ

Reader questions

Can I bring a power bank with 20,000 mAh on board?

Yes, you can bring a 20,000 mAh power bank in your carry-on luggage as long as it does not exceed 100 Wh and the capacity is clearly marked. Loose power banks are not allowed in checked bags.

Do I need to tell the airline about my wheelchair battery before flying?

Yes, if you are traveling with a mobility device or battery that exceeds standard limits, notify the airline in advance or at the gate. Early notification helps ensure proper handling and reduces delays.

What happens if my battery is damaged during screening at the airport?

If a battery appears damaged during screening, Southwest agents may restrict it from transport. You may be required to check the device as checked baggage or remove the battery and carry it in compliance with spare battery rules.

Are power banks allowed in any size on Southwest flights?

No, power banks must be 100 Wh or less and carried in carry-on baggage. Larger power banks require prior approval and documentation, typically for medical or mobility-related equipment.

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