If you’re heading out on vacation this summer, you’ll want to pack carefully. Earlier this year, the Transportation Security Administration (TSA) announced a ban on several common items that are no longer allowed in checked bags. Find out more about the TSA’s new policy and why it was implemented — along with other packing tips to help you speed through airport security.

A lithium-ion battery is a type of rechargeable battery that is commonly used in personal tech devices such as cellphones and laptops. As of March 1, 2025, new TSA rules prohibit passengers from packing portable chargers, power banks, and cellphone battery charging cases that contain lithium-ion batteries in checked luggage. This rule also applies to spare external lithium batteries.

That means you must now pack your laptop charger in your carry-on, not a checked bag. While personal electronic devices that contain such batteries — e.g., laptops, tablets, cellphones — are still permitted in checked bags as long as they are powered off, the TSA recommends that they be carried on board with you.

Why is the TSA restricting these items? The move follows a string of recent incidents in which devices containing lithium batteries have overheated on commercial aircraft, including one that caused a fire and forced an evacuation of an Air Busan aircraft in South Korea in January 2025. According to the FAA and an analysis by CBS News, there was a 42% rise in incidents concerning lithium batteries between 2018 and 2023.

“All lithium ion batteries are capable of overheating and undergoing a process called thermal runaway,” the FAA states on its website. “Thermal runaway can occur without warning as a result of various factors, including if the battery is damaged, overheated, exposed to water, overcharged, or improperly packed. Thermal runaway can also occur on its own due to manufacturing defects.”

Such fires would be difficult to extinguish if they were to happen in the cargo hold, but the TSA says that flight crews are trained to respond to lithium battery fires in the cabin and that “passengers should notify flight crew immediately if their lithium battery or device is overheating, expanding, smoking, or burning.” For more information on lithium battery size and quantity limits, check out the FAA’s PackSafe guide.

While power banks and portable chargers are the latest items to be banned, they’re far from the only products on the TSA’s list. In fact, the organization lists nearly 500 items that are either prohibited entirely or restricted to only carry-on or checked luggage.
If you plan to bring anything unusual on your trip — say, bear spray, tent spikes, or even bowling pins — you’re bound to find it on the TSA’s “What Can I Bring?” page or the similar feature in the MyTSA app. Be sure to consult the agency’s helpful guide before heading to the airport, so you don’t risk running into any security delays and possibly missing your flight — you might find that some of the items banned by the TSA will surprise you.