Bottom line: Power banks under 100Wh can be carried in carry-on luggage (usually under 20000mAh qualifies), 100-160Wh requires airline approval and a max of 2 units, over 160Wh is prohibited, and they must always be in carry-on luggage, never checked. Rules for portable or neck fans with batteries depend on the battery type.
When flying, bringing power banks and neck fans with batteries does require following specific aviation safety rules. Here’s a guide for both items:
✈️ Power Bank Regulations
According to IATA and most airlines, the key factor is the ‘Wh’ value, explained at the end:
- Under 100Wh: Can be carried in carry-on luggage without airline approval.
- 100Wh to 160Wh: Requires airline approval, with a maximum of two per passenger.
- Over 160Wh: Prohibited from being brought on board.
- Unmarked capacity: If the power bank doesn’t show its capacity or it can’t be calculated from other specs, it’s prohibited.
Generally, power banks with a capacity under 20000mAh meet the rules, and their rated capacity is usually under 100Wh.
Also, power banks must be placed in carry-on luggage and are strictly prohibited in checked baggage.
🌬️ Rules for Portable USB Fans and Neck Fans with Batteries
The carry-on rules for portable USB fans and neck fans mainly depend on the type of battery they use:
- Lithium batteries:
- Can be carried in hand luggage but are prohibited in checked baggage.
- It’s recommended to choose products with international certifications and ensure the battery capacity is within the allowed limits.
- Dry batteries:
- Can be carried in hand luggage or checked baggage.
- Be aware of each airline’s restrictions on the number of dry batteries.
- Lead-acid batteries:
- Prohibited in both hand luggage and checked baggage.
- Due to their instability, lead-acid batteries are prone to swelling or even exploding from impact or pressure changes, posing a threat to aviation safety.
✅ Tips & Reminders
- Before buying: Choose products with clearly labeled battery type and capacity, and avoid items with unclear or missing labels.
- Before departure: Check the latest regulations of your airline to ensure your items comply.
- Security check: Place battery-powered devices in your carry-on luggage for easy inspection.
In short, power banks and battery-powered fans/neck fans can be brought on a plane as long as they meet the relevant regulations. However, to ensure a smooth trip, it’s best to check and follow your airline’s specific rules before traveling.
🔋 A Quick Explanation: What is Wh?
Wh stands for Watt-hour, which measures a battery’s rated energy capacity. This value is a key factor in aviation transport regulations.
Wh (Watt-hour) = Voltage (V) × Capacity (Ah)
For example:
- If a power bank is 3.7V × 10,000mAh (which is 10Ah),
- Its energy is: 3.7V × 10Ah = 37Wh.
This capacity is perfectly fine to bring on a plane, as it falls below the 100Wh limit.
✈️ Why Do Airlines Limit Wh?
Because devices containing lithium batteries with high capacity pose risks of overheating, swelling, or even catching fire in high-altitude environments. That’s why aviation safety regulations impose clear limits on Wh values.
