Power banks have become indispensable for modern travelers. Whether you’re on a long-haul flight, stuck in transit, or exploring a new city with limited charging options, these portable chargers keep phones, tablets, and laptops alive. Yet airlines around the world — including major carriers and regulators like India’s DGCA — have tightened rules on them. Many now limit the number you can carry, ban their use during flights, and strictly prohibit them from checked baggage or overhead bins.

These restrictions aren’t about inconvenience. They address a growing and serious safety threat: the fire risk posed by lithium-ion batteries inside power banks. In 2025 and into 2026, lithium battery incidents on aircraft reached record levels, making power banks and similar devices one of the top in-flight safety concerns. Understanding the science, the incidents, and the regulations helps explain why these rules exist and how to travel safely with your charger.

The Science Behind the Risk

Most power banks use lithium-ion batteries — the same technology found in smartphones and laptops. These cells store a lot of energy in a small space, which makes them efficient but also potentially dangerous when something goes wrong.

The primary hazard is thermal runaway. This is a chain reaction where the battery overheats, causing internal chemical reactions that generate even more heat. Once started, it can lead to fire, smoke, venting of toxic gases, or even explosion. Triggers include physical damage (from being dropped or crushed in luggage), manufacturing defects, overcharging, exposure to high temperatures, or short circuits.

What makes power banks riskier than phones or laptops? Many lack the sophisticated battery management systems (BMS) found in modern devices. Smartphones have temperature sensors, software that limits charging rates, and protective circuits. A typical power bank is often just a battery pack with basic protection — sometimes minimal. If one cell fails, there is less “intelligence” to stop the problem from escalating quickly.

At cruising altitude, cabin pressure is lower and airflow is controlled. A fire that starts can spread faster and is harder to contain than on the ground. Aircraft fire suppression systems are designed for certain types of fires, but lithium-ion fires burn extremely hot and can reignite even after being extinguished.

Rising Incidents and Why Regulators Are Worried

Data from aviation authorities shows a clear upward trend. The U.S. Federal Aviation Administration (FAA) has tracked lithium battery incidents involving smoke, fire, or extreme heat since 2006. In 2024 there were around 89 verified incidents; in 2025 the number rose to 93. Battery packs and power banks feature prominently in these reports — often accounting for a large share alongside vapes and phones.

Real-world cases illustrate the danger:

• On a Virgin Australia flight to Hobart in 2025, a power bank inside a backpack in an overhead locker caught fire, producing smoke and flames that required immediate crew action.
• An Air China flight experienced visible flames from what was believed to be a lithium battery device.
• EasyJet had to divert a flight after concerns about a power bank in the hold.

India’s Directorate General of Civil Aviation (DGCA) responded in early 2026 with updated guidance. Power banks and spare lithium batteries must now be carried only in hand baggage. They cannot be placed in overhead bins or checked luggage. Passengers are also prohibited from using power banks to charge devices during flight or charging the power banks themselves via aircraft seat outlets.

These incidents, combined with the massive increase in people traveling with high-capacity power banks, prompted global bodies like IATA and ICAO to reinforce rules. What was once a minor concern has become a priority safety issue.

The Rules: Capacity, Quantity, Location, and Usage

Airline and regulatory limits focus on three main areas: energy capacity, number of units, and where/how they are carried.

Capacity (Watt-hours) is the key metric, not just milliamp-hours (mAh). Watt-hours (Wh) measure actual stored energy. The common formula is:

Wh = (mAh × Voltage) ÷ 1000

Most power banks use a nominal voltage of 3.7V. A popular 10,000 mAh bank is roughly 37 Wh. A 20,000 mAh unit is about 74 Wh. A 30,000 mAh bank reaches around 111 Wh.

• Under 100 Wh: Generally allowed in carry-on without special approval. This covers most everyday power banks.
• 100–160 Wh: Usually limited to a maximum of two per passenger and often requires airline approval in advance.
• Above 160 Wh: Almost universally banned on commercial passenger flights.

Quantity limits have tightened. Many airlines now cap passengers at two power banks. India’s DGCA and several international carriers align with this.

Location rules are strict:

• Power banks must travel in cabin baggage (hand luggage or personal item).
• They are prohibited from checked baggage.
• Increasingly, they should not be stored in overhead bins — keep them accessible so crew can respond quickly if issues arise.

Usage restrictions are also common in 2026. Many airlines, following DGCA guidance for flights in Indian airspace, ban using power banks to charge devices mid-flight and prohibit charging the banks via seat power outlets. The goal is to minimize heat generation and electrical activity during flight.

These rules are harmonized across most major airlines because they follow international dangerous goods standards. Always double-check your specific airline, as minor variations exist.

Why These Restrictions Actually Make Sense

The logic is straightforward: crew access and rapid response. If a power bank starts overheating in the cabin, flight attendants can see smoke or smell issues and intervene immediately with fire extinguishers or other procedures. In checked baggage, problems can go undetected for hours in a pressurized, inaccessible cargo hold.

Overhead bins add another layer of risk. A fire starting there can quickly fill the cabin with smoke before anyone notices. Keeping devices in personal bags under the seat or on your lap improves visibility and response time.

Checked baggage also faces greater physical stress — rough handling, temperature extremes, and pressure changes — all of which increase the chance of battery damage.

By limiting capacity and quantity, regulators reduce the total amount of lithium energy on board. By banning charging, they lower the chance of overcharging or heat buildup during flight.

How Passengers Can Travel Safely

Compliance is simple once you know the rules:

• Check the watt-hour rating on your power bank (usually printed on the device or packaging). If unclear, calculate it using the mAh and voltage.
• Carry no more than two units, and keep them under 100 Wh if possible.
• Pack them in your personal item or carry-on bag — never checked luggage.
• Do not place them in overhead bins if the airline advises against it.
• Avoid using or charging them during flight.
• Inspect your power bank before travel. Discard or replace any that show swelling, damage, or unusual heat.
• Choose reputable brands with proper safety certifications.
• For very long trips, consider airline-approved spares only or rely on in-flight charging where permitted.

If you’re unsure about a specific power bank, contact your airline in advance. Many provide clear guidelines on their websites.

As battery technology improves and solid-state or safer alternatives emerge, rules may evolve. For now, lithium-ion remains dominant, and safety regulations reflect real risks demonstrated by incident data.

Power banks are incredibly useful, but they carry inherent hazards when mishandled or packed incorrectly. Airlines and regulators are not trying to make travel harder — they are protecting everyone on board from a preventable danger that has already caused diversions, smoke events, and fires.

Next time you pack your charger, remember: a few simple precautions can keep your devices powered and the flight safe for everyone. Always verify the latest rules with your airline before departure, especially for international or Indian domestic flights where DGCA guidelines apply.

Safe travels — and keep that power bank accessible, not buried in the hold.

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