Are Battery Backups Allowed On Planes? | Smart Travel Power

Yes, battery backups (power banks) are allowed on planes, but only in your carry-on luggage, never in checked bags.

Staying connected on a trip is a modern necessity, whether it’s navigating new cities, capturing memories, or just keeping in touch. Power banks are indispensable companions for many travelers, offering a lifeline for devices when outlets are scarce. Knowing the rules for bringing these portable powerhouses on an airplane keeps your travels smooth and safe.

The Core Rule: Carry-On is Key

The primary guideline for traveling with battery backups is straightforward: they belong in your carry-on bag. This rule applies universally across airlines and regulators. The reason for this strict policy centers on safety, specifically the potential for lithium-ion batteries to overheat and cause fires.

Should a battery incident occur in the cabin, flight crews can quickly identify and address the situation. In the cargo hold, a fire could go undetected for too long, posing a severe risk to the aircraft and everyone on board. According to the TSA, portable chargers and power banks containing lithium-ion batteries are strictly prohibited in checked luggage and must always be stored in carry-on bags.

Understanding Watt-Hours (Wh) and Milliamp-Hours (mAh)

When assessing battery capacity for air travel, the critical metric is Watt-hours (Wh). This unit measures the total energy a battery can deliver. Milliamp-hours (mAh) is a common rating found on many power banks, representing the electrical charge capacity. To determine a battery’s Wh rating, you can use a simple calculation if only mAh and voltage (V) are listed:

1. Find the voltage (V), usually 3.7V for most power banks.
2. Multiply mAh by V, then divide by 1000.
3. Example: A 20,000 mAh power bank with 3.7V: (20,000 mAh 3.7 V) / 1000 = 74 Wh.

Many power banks clearly label their Wh rating directly on the device. Always check this label before you fly, as it is the definitive number airlines use.

Capacity Limits for Power Banks

Airlines and aviation authorities have established clear limits for the Wh capacity of batteries you can bring on board. These limits are designed to balance traveler convenience with safety protocols.

• Up to 100 Wh: Most common power banks fall into this category. You can bring multiple batteries of this size in your carry-on without needing airline approval. This covers a significant majority of portable chargers on the market.
• 101 Wh to 160 Wh: Batteries in this range require airline approval. You must contact your airline before your flight to gain permission. Typically, there’s a limit of two such spare batteries per passenger. These higher capacity batteries are often found in larger laptop power banks or specialized equipment.
• Above 160 Wh: Batteries exceeding 160 Wh are generally forbidden on passenger aircraft, both in carry-on and checked luggage. This restriction applies to very large power banks or specialized industrial batteries.

Table 1: Common Battery Capacity Guidelines

Watt-Hour (Wh) Rating	Airline Approval Needed?	Quantity Limit (Per Passenger)
Up to 100 Wh	No	Reasonable number for personal use
101 Wh – 160 Wh	Yes (Contact Airline)	Maximum of two (2)
Over 160 Wh	No (Not Permitted)	Zero (0)

Packing Your Power Bank Safely

Beyond capacity limits, how you pack your power bank matters. Proper handling prevents potential hazards and ensures a smooth security screening experience.

• Protect Terminals: Exposed battery terminals can short-circuit if they come into contact with metal objects. Keep batteries in their original retail packaging, a battery case, or a protective pouch. If these aren’t available, taping over the terminals with non-conductive tape (electrical tape) is a good alternative.
• Prevent Accidental Activation: Ensure your power bank is turned off before packing it. Some models have “on” buttons that can be accidentally pressed in a crowded bag.
• Accessibility: During security checks, you might be asked to remove electronics, including power banks, from your bag for separate screening. Packing them in an easily accessible spot saves time and hassle.

Spare Batteries and Devices: What’s the Difference?

It helps to distinguish between spare batteries and batteries installed within devices. The rules primarily target spare or loose lithium batteries, which include power banks.

• Installed Batteries: Devices with non-removable lithium batteries (like most smartphones, laptops, and tablets) can generally travel in either checked or carry-on luggage. However, many travelers prefer to keep valuable electronics in their carry-on for security and accessibility.
• Spare Batteries: This category includes power banks, loose camera batteries, and spare batteries for other portable electronic devices. These must* always be in your carry-on. They are considered a higher risk when loose due to the potential for short-circuiting.

International Travel Considerations

While the guidelines provided by US authorities like the TSA and FAA align with international aviation safety standards set by the International Civil Aviation Organization (ICAO), specific airline policies can sometimes add nuances. The core rules regarding carry-on placement and Wh limits are widely consistent globally.

When flying internationally, it is always a good practice to check the specific airline’s website for any additional restrictions or requirements. Some airlines might have slightly stricter quantity limits or specific packing recommendations. The FAA provides comprehensive guidance on hazardous materials, including batteries, for air travel, which forms the basis for many airline regulations.

Table 2: Airline vs. Regulator Guidance

Authority Type	Primary Role	Key Focus for Batteries
Regulatory Bodies (TSA, FAA, ICAO)	Set overarching safety standards	General Wh limits, carry-on rule, hazard prevention
Individual Airlines	Implement and enforce regulations	Specific quantity limits, detailed packing advice, approval processes

Best Practices for Traveling with Power Banks

Following a few simple best practices ensures your power bank travels safely and serves you well on your journey.

• Charge Before You Go: Arriving at the airport with a fully charged power bank means it’s ready to use immediately upon landing or during layovers.
• Check for Damage: Never travel with a swollen, leaking, or otherwise damaged power bank. These batteries pose a significantly higher fire risk. Dispose of them responsibly.
• Clear Labeling: Ensure the Wh rating is clearly visible on your power bank. If it’s worn off, you might face issues at security.
• Avoid Overpacking: While you can bring multiple smaller power banks, avoid cramming your carry-on with excessive electronics. This can complicate security screening and increase the risk of accidental damage.