Can You Bring Power Bank On A Plane? | FAA Rules Explained

Most travelers know lithium batteries don’t belong in checked bags, but the rule for power banks still catches people off guard. Maybe you’ve seen a friend toss a portable charger into their suitcase at the last second, or you’ve wondered if the TSA agent at the x-ray machine will flag yours.

Power banks are classified as spare lithium batteries, which means they follow strict cabin-only rules. The short answer is clear: you can bring them, but only in your carry-on. This article walks through the official TSA and FAA rules, capacity limits by watt-hours and mAh, airline-specific quirks, and what to do if your power bank is larger than average.

TSA and FAA Rules for Power Banks

The Transportation Security Administration (TSA) is unequivocal: portable chargers and power banks containing lithium ion batteries must be packed in carry-on baggage. Checked luggage is off limits. This applies to every domestic U.S. flight and most international flights that follow similar standards.

The Federal Aviation Administration (FAA) reinforces this rule. It defines power banks as “spare (uninstalled) lithium ion and lithium metal batteries” for travel purposes. Because they aren’t installed in a device, they must stay with the passenger in the aircraft cabin. The reason is fire safety – lithium batteries can overheat and catch fire, and cabin crew need immediate access if that happens.

Both agencies also require that you protect power banks from damage and short circuits. Loose batteries should be placed in their original packaging, a plastic case, or have terminals covered with tape. Avoid packing recalled, damaged, or defective power banks in any luggage – they should be disposed of safely before your trip.

Why the Cabin-Only Rule Exists

The restriction isn’t arbitrary. Lithium-ion batteries, especially high-capacity ones, have a known risk of thermal runaway – a chain reaction that can produce intense heat and fire. In the cargo hold, a fire from a power bank would be very hard to extinguish before it spreads. In the cabin, flight attendants have fire extinguishers and can move passengers away.

Key reasons the rules are strict:

• Thermal runaway risk: Lithium cells can short-circuit from damage, manufacturing defects, or extreme temperature changes. Once thermal runaway starts, it releases flammable gas and intense heat.
• Past incidents: The FAA has documented multiple in-flight fires caused by spare lithium batteries. This led to the current carry-on mandate and the 100 watt-hour limit for unapproved batteries.
• Recalls and defects: Many power banks have been recalled over fire risks. Airlines and regulators can’t rely on passengers knowing about recalls, so they ban all damaged or questionable units.
• Checked baggage handling: Suitcases can be thrown, crushed, or exposed to temperature swings, all of which could damage a power bank and trigger a fire with nobody watching.

The bottom line from the FAA: the cabin is the safest place for spare lithium batteries because there’s human supervision and immediate firefighting equipment.

Capacity Limits: Watt-Hours and mAh

The official measurement for battery capacity in travel rules is watt-hours (Wh). Most consumer power banks stay under 100 Wh, which is the threshold that TSA says you can carry without special approval. The TSA states that batteries over 100 Wh require airline approval before travel – see its TSA power bank rule for the exact wording. Anything above 160 Wh is generally prohibited, though some sources suggest that limit is for safety reasons.

If your power bank uses milliampere-hours (mAh), you can roughly convert to Wh using this formula: (mAh × voltage) ÷ 1000 = Wh. Most power banks run at 3.7V, so 20,000 mAh equals about 74 Wh. That’s well under the 100 Wh limit. Even a 27,000 mAh power bank (roughly 100 Wh) is still okay without airline approval, though at the edge.

Here’s a quick reference table for common sizes:

Note that the 100 Wh limit is per battery, not per passenger. Some airlines allow multiple power banks as long as each is under 100 Wh and the total stays reasonable. Industry guidelines (from IATA) suggest up to 20 spare batteries per passenger in carry-on, but that is not an official TSA or FAA rule. Always check with your specific airline for their exact policy on multiple units.

What to Do If Your Power Bank Is Over 100 Wh

If you need a larger power bank (like a 30,000 mAh or 40,000 mAh model), you cannot just toss it in your bag. You must contact your airline in advance. The TSA categorizes batteries over 100 Wh as “lithium batteries more than 100 watt-hours” and requires airline approval. Not all airlines grant it, and some may limit you to one such battery per passenger.

1. Check your power bank’s label: Look for the Wh rating. If it isn’t printed, look for mAh and voltage. Convert to Wh using the formula above.
2. Contact the airline before your flight: Call or chat with customer service, provide the exact specifications, and ask for written approval. Some airlines have forms online.
3. Pack it carefully: Ensure terminals are insulated (tape or plastic case) and that the power bank cannot turn on accidentally. Keep it accessible in your carry-on.
4. Arrive early: TSA may need to inspect an oversized power bank separately. Give yourself extra time at security.
5. Consider smaller alternatives: Two smaller power banks (e.g., two 20,000 mAh units) are easier to carry than one 40,000 mAh bank and avoid the approval hassle.

If your power bank is 160 Wh or above, it is likely banned entirely by most airlines. Check with your carrier, but plan to ship it separately or leave it at home.

International Flights and Regional Variations

The TSA and FAA rules apply to all flights originating in or arriving in the United States, but other countries have similar standards based on IATA and ICAO guidelines. Power banks must stay with you in the cabin, as outlined by the FAA cabin requirement. The 100 Wh limit is nearly universal, though some airlines or regions may set different caps.

For example, many European and Asian carriers follow IATA’s Dangerous Goods Regulations closely: lithium ion batteries up to 100 Wh are allowed in carry-on, but over 100 Wh and up to 160 Wh need airline approval. Some Middle Eastern airlines are stricter about the quantity – you might be limited to two or three power banks total, even if each is under 100 Wh. Always check the airline’s website for “dangerous goods” or “battery policy” before packing.

Quick comparison of common airline policies:

No matter where you fly, the rule that power banks are banned from checked luggage is universal and non-negotiable. If you pack one in a suitcase, it will be removed (and possibly confiscated) by security screening.

The Bottom Line

You can bring a power bank on a plane, but it must ride in your carry-on bag the entire trip – never in checked luggage. Standard chargers up to 100 Wh (roughly 27,000 mAh) are fine without special permission. For larger units, call your airline in advance to get approval. Protect the terminals with tape or a case to prevent short circuits, and never pack a damaged or recalled battery.

If your power bank is over 100 Wh or you’re flying internationally, check your airline’s policy directly before you pack. The TSA and FAA rules are a solid starting point, but each airline may have its own safety limits that could affect your plans.