Can You Bring Batteries on a Plane?

Yes, you can take batteries on a plane — but it depends on the type, size, and where you pack them. Airlines and airport security follow strict safety rules, mainly to prevent fires caused by damaged or overheated batteries, especially lithium-based ones.

Understanding which batteries are allowed and how to carry them will save you hassle at security and avoid the risk of confiscation.

Lithium-Ion Batteries (Rechargeable)

Lithium-ion batteries are the most common type found in items like phones, laptops, vapes, power banks, and cameras. These must be packed in your hand luggage, not in checked baggage. Spare batteries and power banks also belong in cabin bags, never the hold.

There’s a size limit: the standard allowance is 100 watt-hours (Wh) per battery. If your device uses a larger battery — between 100 and 160Wh — you’ll need airline approval before flying. Most everyday electronics like phones and laptops are well under the limit.

Batteries should be protected against short circuits, ideally kept in their original packaging or a dedicated case. Taping over the terminals is also a good precaution.

Lithium Metal Batteries (Non-Rechargeable)

These are typically used in small devices like watches, remote controls, or hearing aids. Unlike lithium-ion, these can go in both cabin and checked bags, provided they don’t exceed 2 grams of lithium content per cell. They’re generally low-risk and don’t require airline notification.

Standard AA, AAA and Alkaline Batteries

These are allowed in both hand and checked luggage without special restrictions. However, you should pack them to avoid movement or contact with other metal objects. Loose batteries should not be left rolling around inside your bag, especially if there’s any chance of them touching each other or conductive materials.

Car Batteries and Other Large Batteries

Lead-acid car batteries, wet cell batteries, or similar large formats are generally not allowed unless being used in approved medical or mobility equipment. In those cases, you’ll need to contact the airline ahead of your flight and get written approval. For regular passengers, they’re off-limits.

Travelling with Vape Batteries

Vape kits and their batteries come under lithium-ion regulations. This means they must always be stored in your cabin bag. Never pack them in your checked luggage. Spare batteries should be kept in a protective case. You’re also not allowed to charge or use your vape while on the plane.

Airline Differences and Safety Tips

Although most UK airlines — including easyJet, British Airways and Ryanair — follow similar safety standards, you should always double-check with your specific carrier if you’re carrying several batteries or anything unusual. Policies can differ slightly, and carrying something banned could mean losing it at the gate.

Before flying, make sure all batteries are undamaged, switched off, and stored securely. If a battery looks swollen or broken, don’t travel with it — it’s unsafe, and it will likely be confiscated at security.

Final Word

Batteries are allowed on planes, but there are clear rules about how and where you pack them. Lithium-ion batteries must go in your carry-on, not the hold. Keep things neat, safe, and within limits, and you won’t run into any issues. If in doubt, ask your airline before you fly.