Recent incidents have put renewed focus on how passengers handle batteries when flying within the United States. A British Airways flight made an emergency landing after a battery fire injured a passenger, and federal data show dozens of similar events already this year. The issue centers on lithium batteries found in everyday devices, and the rules that separate what can go in checked bags from what must stay in carry-ons. Proper packing reduces risks in the confined environment of an aircraft. ([1])
The Rising Number of Battery Incidents
The Federal Aviation Administration recorded 28 battery-related fire events on passenger and cargo planes in the first quarter of 2026. That pace suggests the annual total could exceed the 97 events logged in 2025. Lithium batteries, both non-rechargeable and rechargeable types, pose the main concern because they can enter thermal runaway, a rapid reaction that generates intense heat, smoke, and flames. Traditional fire extinguishers often prove ineffective against these fires, and aircraft air recirculation can spread fumes to other passengers. Airlines and regulators have responded with stricter guidelines that place more responsibility on travelers to pack correctly.
Devices That Require Extra Care
Cell phones, laptops, power banks, and vapes rank among the most frequent sources of in-flight battery problems. Other common items also contain lithium cells, including wireless earbuds, noise-canceling headphones, cameras, drones, handheld gaming devices, smartwatches, electric toothbrushes, and portable medical equipment. To check whether a device uses lithium chemistry, look for the symbol “Li” on the label or in the manual, or terms such as Li-polymer or Li+. Coin-cell batteries marked “CR” are another indicator. Spare or loose batteries fall under the strictest rules because they lack the protection of a device casing.
Carry-On Versus Checked Bag Requirements
TSA rules prohibit spare lithium batteries, including power banks and external charging cases, from checked luggage. These items must travel in carry-on bags so crew members can respond quickly if a problem occurs. If a bag must be gate-checked, passengers need to remove the batteries and keep them on board. Batteries installed inside a device may go in checked bags provided the device is powered completely off and protected from accidental activation. Dry-cell batteries such as standard AAs or 9-volts face fewer restrictions and can travel in either bag, though their terminals should be covered to prevent short circuits. Individual airlines may add tighter limits; Southwest, for example, restricts passengers to one power bank each and requires visible storage during use.
Steps to Take During the Flight
Carrying lithium batteries in the cabin does not eliminate risk, yet it improves the chance of a fast response. Passengers should alert crew immediately if a battery or device falls between seats. Charging external power banks is discouraged, and any sign of overheating, swelling, or smoke requires prompt notification. Damaged or recalled batteries should be left behind and disposed of properly rather than packed. Following these steps helps maintain safety for everyone on board while avoiding potential fines for rule violations.
