Flying With Power Banks: The Carry-On Rules to Know

Flying with power banks is mostly a carry-on question, but the number printed on the battery and your airline’s own rules matter too. A portable charger is a spare lithium-ion battery, not simply another gadget: if it overheats, cabin crew can respond more quickly when it is in the passenger cabin. According to the Federal Aviation Administration (FAA), power banks must travel in carry-on baggage and must be removed if the bag is checked at the gate.

Why a power bank belongs in your cabin bag

Unlike a laptop or phone with its battery installed, a power bank is a spare battery. Under FAA guidance, spare lithium batteries—including portable chargers—are not allowed in checked baggage. According to the Transportation Security Administration’s current power-bank page, power banks are allowed in carry-on bags and not in checked bags. The FAA says a battery can overheat or enter thermal runaway, and a cabin incident is easier for crew to notice and address than one in a cargo hold.

That distinction matters at the gate. If an airline takes your cabin bag to put it in the hold, pull out the power bank and keep it with you; don’t assume it can stay inside just because it passed security. The FAA specifically says to remove spare batteries and power banks when a carry-on is gate-checked. International Air Transport Association (IATA) passenger guidance also says to remove battery-powered devices and batteries before a cabin bag is placed in the hold. Installed laptop and phone batteries follow different rules, but carrying devices in the cabin avoids some uncertainty.

Read the Wh label before relying on mAh

Watt-hours measure a battery’s energy capacity. The FAA’s U.S. passenger guidance says rechargeable batteries up to 100 Wh are allowed, while 101–160 Wh batteries require airline approval; above 160 Wh is prohibited on passenger aircraft. The 101–160 Wh allowance is not a guarantee that a power bank in that range will be accepted. IATA’s 2026 passenger guidance has a separate power-bank row: a maximum of two banks, each no more than 100 Wh, and a bank above 100 Wh is forbidden under that guidance. In other words, do not treat the general spare-battery approval band as automatic permission for a larger power bank.

Look for Wh printed on the bank or in its manufacturer documentation. If only volts and amp-hours are shown, Wh equals volts multiplied by amp-hours; for milliamp-hours, divide by 1,000 first. For example, a 20,000 mAh bank rated at 3.7 volts works out to 74 Wh (20 Ah × 3.7 V). The voltage matters, so mAh alone cannot establish whether a bank is under the limit. If the label is missing or unreadable, don’t guess: the FAA notes that staff may be unable to verify a battery’s rating, and the airline may not permit it.

Airlines can add limits beyond the broad thresholds

Carrier rules can be narrower than the general national or international framework. Delta’s published policy allows no more than two power banks per person, caps each at 100 Wh with no exceptions, says they cannot go in overhead bins, and bars recharging a bank from aircraft power. United’s current electronic-device page also limits passengers to two portable chargers, says to keep them on you or in a personal item rather than an overhead bin, and says not to recharge them using aircraft power. A partner or connecting carrier may have different rules.

There is a further distinction between general battery limits and power-bank-specific policy. FAA material describes the 101–160 Wh approval option for larger spare lithium-ion batteries, while IATA’s 2026 passenger document says airline restrictions on power banks can be more stringent and classifies those over 100 Wh as forbidden. These are not universal, identical rules for every route: national aviation requirements, airline safety policies, destination rules and ticketed carriers can differ. Check each airline operating your trip, including a codeshare or connection, rather than relying on a summary for a different country.

Protect terminals and check before leaving

Prevent a short circuit by keeping a power bank from loose metal objects such as keys or coins, and protect it from crushing or puncture in a bag. For loose spare batteries, the FAA recommends original retail packaging, a battery case, a protective sleeve or a separate snug pouch; covering exposed terminals with tape is another option. IATA similarly advises original packaging or terminal covers. Don’t pack a swollen, damaged or recalled bank: the FAA says damaged or recalled lithium batteries that could spark or generate dangerous heat must not be carried unless made safe.

Flying with power banks is easier when you check the printed Wh rating, the number you plan to carry, and each airline’s current policy before heading to the airport. For a separate look at ordinary phone battery lifespan, see GenZ NewZ’s guide to smartphone battery aging; battery wear and aircraft carriage rules are different issues. Confirm whether larger banks are excluded, where the airline requires them to be stored, and whether onboard use or charging is restricted. Keep the charger accessible in your personal item in case a cabin bag is gate-checked, and verify the rule again before a return flight with a different carrier or country. If a battery becomes hot, swells, smokes or burns, tell a crew member immediately rather than trying to manage it yourself. Rules for a specific itinerary take precedence.