Southwest Airlines allows lithium batteries in carry-on baggage only. Spare lithium-ion batteries (up to 100 watt-hours) and lithium metal batteries (up to 2 grams of lithium) are permitted. Batteries must be protected from short circuits. Devices with installed batteries can be checked in, but spare batteries are prohibited in checked luggage. Damaged or recalled batteries are banned entirely.
Deespaek 12V 100Ah LiFePO4 Lithium Battery – The Pinnacle of Power Storage Solutions
How Many Spare Lithium Batteries Can You Bring on Southwest?
Passengers may carry up to 20 spare lithium batteries total. Lithium-ion batteries must not exceed 100 watt-hours each, while lithium metal batteries are capped at 2 grams of lithium content per battery. Batteries must be stored in original packaging or with terminals covered to prevent contact with metal objects. Quantities beyond these limits require prior airline approval.
When packing multiple batteries, travelers should consider using separate plastic cases or individual zip-lock bags. Southwest staff may request visual verification of battery terminals during security screening. For professional photographers or videographers carrying specialized equipment, prior coordination with Southwest Cargo is recommended for large battery shipments. The 20-battery limit applies to all battery types combined – passengers can’t carry 20 lithium-ion AND 20 lithium metal batteries.
Top 5 best-selling Group 14 batteries under $100
| Product Name | Short Description | Amazon URL |
|---|---|---|
|
Weize YTX14 BS ATV Battery  |
Maintenance-free sealed AGM battery, compatible with various motorcycles and powersports vehicles. | View on Amazon |
|
UPLUS ATV Battery YTX14AH-BS  |
Sealed AGM battery designed for ATVs, UTVs, and motorcycles, offering reliable performance. | View on Amazon |
|
Weize YTX20L-BS High Performance  |
High-performance sealed AGM battery suitable for motorcycles and snowmobiles. | View on Amazon |
|
Mighty Max Battery ML-U1-CCAHR  |
Rechargeable SLA AGM battery with 320 CCA, ideal for various powersport applications. | View on Amazon |
|
Battanux 12N9-BS Motorcycle Battery  |
Sealed SLA/AGM battery for ATVs and motorcycles, maintenance-free with advanced technology. | View on Amazon |
Why Are Lithium Batteries Restricted to Carry-On Bags?
Lithium batteries pose fire risks due to thermal runaway, which can occur without warning. In the cabin, crew can quickly respond to incidents using fire containment tools. Checked luggage lacks immediate monitoring, increasing the danger of uncontrolled fires in cargo holds. The FAA mandates this rule to reduce risks of in-flight emergencies.
What Happens If You Accidentally Check a Lithium Battery?
If a lithium battery is found in checked baggage, Southwest may remove it and notify the passenger. Repeat violations could result in baggage delays or fines from the TSA. Passengers are advised to double-check bags before arrival at the airport. Southwest reserves the right to deny boarding for severe violations.
How to Calculate Lithium Battery Watt-Hours for Compliance
Multiply battery voltage (V) by ampere-hours (Ah). Example: A 12V 8.3Ah battery = 99.6 watt-hours. For lithium metal batteries, check manufacturer specifications for lithium content (max 2 grams). Batteries without watt-hour labels require airline approval. Southwest recommends carrying manufacturer documentation for larger batteries.
Many modern devices like professional cameras or medical equipment use batteries between 50-100 watt-hours. Below is a quick reference table for common battery configurations:
| Device Type | Voltage (V) | Ampere-Hours (Ah) | Watt-Hours (Wh) |
|---|---|---|---|
| Laptop | 11.1 | 7.5 | 83.25 |
| Drone | 15.2 | 5.0 | 76.0 |
| CPAP Machine | 12.0 | 8.3 | 99.6 |
“Southwest’s lithium battery policy aligns with global aviation safety standards. The carry-on requirement enables rapid response to thermal events, which can escalate catastrophically in just 90 seconds. Passengers should never assume battery safety—proper storage and capacity checks are non-negotiable for modern air travel.” — Aviation Safety Specialist, International Air Transport Association
FAQs
- Can I Bring a Lithium-Powered Mobility Device?
- Yes, mobility devices with lithium batteries are permitted. Notify Southwest in advance and ensure batteries are securely attached. Spare batteries must meet standard carry-on restrictions.
- Does Southwest Provide Battery Disposal Services?
- No. Use airport recycling kiosks or certified e-waste facilities. Many major airports have battery disposal stations post-security.
- Are Lithium Batteries Safe in Checked Electronic Devices?
- Devices like laptops in checked bags are permitted, but Southwest recommends carrying them in the cabin when possible. Ensure devices are powered off completely.