How to Pack Lithium Batteries Safely for Air Travel

If you travel by plane, you likely have a phone, a laptop, or a power bank. All of these use lithium batteries. These batteries are great because they hold a lot of power. However, they can also be a little dangerous on an airplane.

Flying with lithium batteries is easy once you learn the simple rules. The main reason for these rules is safety. If a lithium battery is damaged or packed incorrectly, it can get very hot and even catch fire. Most problems happen because of poor packing, not the flight itself.

You must follow the rules from the TSA and the FAA to keep everyone safe. The most important rule to remember is this: Always put spare lithium batteries and power banks in your carry-on bag. You should never put them in your checked luggage.

Before You Pack: Know Your Battery Type

The packing steps below apply to all lithium batteries. However, the rules about how many you can bring and where they must go depend on your battery’s watt-hour (Wh) rating. If you are not sure whether your battery is allowed on your flight, check our complete guide on flying with lithium batteries before packing.

The one rule that never changes: all spare lithium batteries and power banks must go in your carry-on bag — never checked luggage. Now here is how to pack them correctly.

How to Pack Lithium Batteries Properly: A Step-by-Step Guide

This is the most important part of keeping your flight safe. Follow these simple steps to pack your batteries properly.

Step 1: Protect Terminals from Short Circuit

A short circuit occurs when the metal ends (terminals) of a battery touch another piece of metal, such as a coin, a key, or another battery. This can cause the battery to heat up and start a fire.

How to Protect the Terminals:

• Tape the Ends: Use clear packing tape or electrical tape to cover the metal ends of the battery.
• Use Caps: If the battery came with plastic caps to cover the ends, use them!
• Keep Original Packaging: If you still have the box the battery came in, use it for travel.
• Use Separate Bags: Put each spare battery in its own small plastic bag or zip bag.

What Not to Do: Never let loose batteries roll around in your bag pockets. They can touch metal objects there.

Step 2: Use Protective Cases

After protecting the terminals, place the batteries in a case for added safety.

• Hard Cases: Use hard plastic cases for camera or drone batteries. These cases are made to keep the batteries safe from bumps and pressure.
• Soft Sleeves: Power banks can be put in a soft sleeve or a padded case.
• DIY Option: If you do not have a special case, you can use a small, padded bag. You can also wrap the battery in a thick cloth after taping the terminals.

Step 3: Keep Each Battery in Its Own Bag or Case

It is best to keep your spare batteries separate. Do not stack them all together in one big pile. If batteries touch each other, they can sometimes create heat, which is dangerous. Give each one its own safe space.

Step 4: Place Batteries in an Easy-to-Reach Part of Carry-On

The TSA agent might ask to look at your batteries when you go through security. If they are buried deep inside your bag, it will slow you down. Please keep them in a side pocket or a small bag on top of your clothes so they are easy to pull out.

Step 5: Label High-Capacity Batteries (101–160 Wh)

If you have those bigger 101–160 Wh batteries, you must be ready to show the airline and TSA what you have.

• Know Your Numbers: The Watt-hour (Wh) rating is usually printed on the battery.
• Take a Picture: Take a picture of the battery label with your phone.
• Print It Out: You can even print out the battery details and keep them with the battery. This makes it easy to prove the battery is within the allowed size limit.

Packing Power Banks Safely

Power banks are a traveler’s best friend. However, they are also the most common items that get taken away at the airport.

• Carry-On Only: Just like all spare batteries, your power bank must be in your carry-on bag.
• Protect the Button: Some power banks can turn on by accident if something pushes the power button. You can put a small piece of tape over the power button to keep it from turning on inside your bag.
• No Cables Inserted: Do not pack your power bank with a charging cable plugged into it. This can cause it to start charging or discharging, which creates heat.
• Check the Size: Most power banks are under 100 Wh. If yours is bigger, you must follow the rules for medium batteries (101–160 Wh) and get airline approval.

How to Pack Batteries Installed in Devices

What about the batteries that are already inside your laptop, camera, or electric toothbrush?

• Turn the Device OFF: Do not just put your laptop to “sleep.” You must completely turn off the device before packing it. This prevents the battery from accidentally overheating.
• Protect the Device: Pack the device so nothing heavy can press on it and damage the battery.
• Remove If Possible: If your camera or drone has a battery that is easy to take out, it is safer to remove it and pack it separately using the steps above.
• Check Accessories: Make sure no memory cards or other accessories are left in a way that could accidentally turn the device on.

What Not to Pack (Mistakes to Avoid)

Knowing what not to do is just as important as knowing what to do. Avoid these common mistakes to have a smooth trip.

• Loose Batteries: Never put loose batteries in your pockets, backpack, or purse. They will come into contact with metal objects, which can cause a short circuit.
• Damaged Batteries: If a battery looks swollen, cracked, or is leaking, do not pack it. It is a fire risk and will be taken away by the TSA.
• Wet Batteries: If a battery has gotten wet, do not try to travel with it.
• Charging in the Bag: Never charge a device or power bank while it is inside your bag. This traps the heat and can cause a fire.
• Cheap Batteries: Be careful with very affordable, unbranded batteries. They may not have the safety features of a quality battery and are more likely to fail.

Tips for Photographers, Drone Pilots & Travelers

If you travel often with a lot of gear, these tips will help you stay organized and safe.

• Carry Your Specs: Keep a small card or a picture on your phone with the Watt-hour (Wh) rating for all your large batteries. This makes it easy to show the TSA agent.
• Travel at 30–50% Charge: Experts suggest keeping your batteries at a low charge (around 30%- 50%) when you travel. This makes them safer because a fully charged battery has more energy to release if something goes wrong.
• Mark Your Spares: Use a small sticker or marker to label your spare batteries as “Charged” or “Empty.” This helps you keep track and ensures you do not accidentally pack a damaged one.

Should You Use a Fireproof LiPo Bag?

Many people ask if they need a special fireproof bag, often called a LiPo bag.

• The Pros: These bags are made to slow down or stop a fire if a battery overheats. They are highly recommended for drone pilots and anyone with high-power batteries, as they provide significant extra protection.
• The Cons: The TSA and FAA do not officially require you to use them. You can still fly safely without one, as long as you follow all the other packing rules. Think of it as a cheap way to buy peace of mind.

Travel Checklist (Quick & Simple)

Use this quick list before you leave for the airport to make sure your batteries are packed safely.

• Terminals Taped: The metal ends of all spare batteries are covered with tape or a cap.
• Cases Used: Each spare battery is in its own protective case or bag.
• Only in Carry-On: All spare batteries and power banks are in your carry-on bag, not your checked luggage.
• Device Turned Off: All devices with batteries inside are completely turned off, not just sleeping.
• Wh Rating Checked: You know the Watt-hour rating of your batteries, especially the large ones.
• No Damage: All batteries are free of cracks, swelling, or leaks.

Conclusion

Packing lithium batteries safely is easy when you follow the rules. Keep all spare batteries in your carry-on, protect the terminals, and use cases. These small steps keep you, your things, and the whole plane safe.

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