Can You Bring Lithium on a Plane?

Can you bring lithium batteries on a plane? Yes, but only in your carry-on. The TSA allows lithium batteries and power banks under 100 Wh (about 27,000 mAh) in the cabin, but completely bans them in checked luggage.

Due to recent cabin fire safety updates, major US airlines now restrict you to a maximum of two power banks, which must be stored under the seat in front of you—not in the overhead bins. Ensure all battery labels are fully readable before heading to the airport.

What Exactly Counts as a "Lithium Battery"?

Except for the power bank, the hidden lithium inside your bags might also be:

• Smartphones, MacBooks/Laptops, iPads/Tablets, AirPods/Wireless earbuds.
• Drones (DJI packs), GoPro/Mirrorless cameras, E-cigarettes/Vapes, rechargeable electric toothbrushes, heated travel jackets, and smart luggage (AirTags vs. battery-integrated bags).

US Domestic vs. International Flights: Are the Baseline Rules the Same?

The standard 100 Wh limit and the "Carry-on ONLY for spares" rule apply globally whether flying Delta from LAX to JFK, or United from SFO to Tokyo.

Well, the biggest difference is that TSA is focused on security screening at the checkpoint. However, when flying international legacy carriers or Asian budget airlines, you face strict weight/piece limits at the boarding gate, where every single power bank is individually scrutinized.

Major US Airlines Rules for Lithium on a Plane

• The Two-Charger Cap: While TSA doesn't legally enforce a strict quantity count for small batteries, American, Delta, and United now strictly limit passengers to 2 power banks max.
• The Overhead Bin Ban: Power banks can no longer be stuffed into rolling carry-ons stored overhead. They must stay in personal items under the seat.
• No In-Seat Recharging: The new global mandate that bans charging the power bank itself using the aircraft's USB ports.

Passing Security in Major Asia’s Hubs

• China (CAAC Rules): The absolute strictest. Mention the "Zero Tolerance for Faded Labels" policy.
• Japan (JCAB Rules): Very mechanical and strictly by-the-book. They pay close attention to professional camera/drone batteries (100–160 Wh limits) and cordless hair curlers (which are completely banned if the battery cannot be physically removed).
• South Korea & Thailand: Incheon (ICN) and Bangkok (BKK) have highly efficient but eagle-eyed security teams that strictly count the number of spares and will pull you aside during transit screening if your power bank lacks clear Wh/mAh stamps.

Pre-Trip Tips Before Headed to the Gate

1. Check the product labeling: Power banks and lithium batteries must be clearly labeled with their Wh rating or include equivalent specifications (such as voltage (V) and amp-hours (Ah); otherwise, the airline may deny boarding.
2. Pack properly for protection: Cover the terminals with electrical tape or place them in the original manufacturer’s packaging to prevent short circuits or damage; carry-on baggage only.
3. Apply for approval in advance: If your battery capacity is between 100Wh and 160Wh, contact your airline to obtain permission to transport it.
4. Follow flight regulations: Many airlines have banned the use of power banks on board; make sure yours stays switched off for the entire flight and stow it securely under your seat.

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