Can I Bring a 20000mAh Power Bank on EasyJet Flights?
Updated 2026-07-27 · Power Bank Guide
If you are prepping for a trip, the most important thing to know about easyjet power bank rules is that portable chargers are strictly forbidden in checked luggage. They must be carried in your hand luggage due to the risk of lithium-ion battery fires in the cargo hold. But is a 20000mAh bank too large for the cabin?
The short answer is yes, you can bring a 20000mAh power bank on an EasyJet flight. Most airlines, including EasyJet, follow international aviation standards that allow batteries up to 100 Watt-hours (Wh) without prior approval. A 20000mAh bank typically falls well under this limit.
How to Calculate Wh for easyjet power bank rules
Airlines care about Watt-hours (Wh), not milliamp-hours (mAh). To determine if your charger is flight-safe, you need to convert the capacity using the standard internal battery voltage of 3.7V. The formula is: (mAh Ă· 1000) Ă— Voltage = Wh.
For a 20000mAh power bank, the math looks like this: (20,000 Ă· 1000) Ă— 3.7V = 74Wh. Since 74Wh is significantly lower than the 100Wh limit, a 20000mAh bank is perfectly legal for carry-on travel. Always ensure the capacity is clearly printed on the device casing; security officers may confiscate batteries if the specs are rubbed off or missing.
Charging Phones: How Many Full Charges?
While a 20000mAh bank sounds massive, you won't get the full 20000mAh into your phone. This is due to voltage conversion (stepping up from 3.7V to 5V or more) and heat loss. In real-world conditions, you can expect about 60% to 70% efficiency.
Here is a breakdown of roughly how many charges you can expect for common devices:
- iPhone 15/16/17: 3 to 4 full charges, depending on the model and battery health.
- Samsung Galaxy S23/S24: 3 to 4 full charges.
- Google Pixel 8/9: 3 to 4 full charges.
- Small Budget Androids: 4 to 5 full charges.
If you are looking for a reliable travel companion, the INIU 20000mAh Portable Charger (Flight-Safe) is a great pick. It is TSA/flight-safe, pocket-sized, includes a USB-C cable and flashlight, and charges an iPhone 17, Samsung, Xiaomi or Google phone multiple times.
Fast Charging and USB-C PD on the Go
When charging during a long layover, speed matters. Modern power banks use USB-C Power Delivery (PD) to push more wattage into your device. A charger with 22.5W output, like the INIU 20000mAh Portable Charger, can significantly reduce the time it takes to get from 0% to 50% compared to old 5W or 10W bricks.
However, keep in mind that the actual charging speed depends on your phone's capabilities. While a Samsung or Pixel may support higher speeds, the power bank must match that protocol to hit peak wattage. If you use the phone while it is charging—such as streaming video or using GPS—the effective charging speed drops because the phone consumes power as it receives it.
Tips for Using Power Banks During Flights
To get the most out of your battery during your trip, follow these practical tips:
First, avoid charging your phone when it is already at 80% or 90%. The last 20% of a battery charge is the slowest and generates the most heat, which wastes energy from your power bank. Second, use a high-quality USB-C to USB-C cable to ensure the fastest possible energy transfer.
Finally, remember that while 20000mAh is great for a few days of travel, larger banks (like 30000mAh or 40000mAh) can sometimes push past the 100Wh limit. Always check the fine print on the back of the device before heading to the airport to avoid any issues at the security checkpoint.
FAQ
Do I need to tell EasyJet I have a power bank?
No, you do not need to declare a 20000mAh power bank as long as it is under 100Wh and kept in your carry-on luggage. Just ensure it is easily accessible if security asks to inspect it.
Can I use my power bank while the plane is taking off?
Most airlines allow the use of electronic devices in "Flight Mode" during takeoff and landing. However, some flight crews prefer you do not charge devices during these critical phases for safety reasons. Follow the crew's instructions.
What happens if my power bank is over 100Wh?
Batteries between 100Wh and 160Wh typically require airline approval. Anything over 160Wh is generally prohibited on passenger aircraft. Since a 20000mAh bank is only ~74Wh, you are well within the safe zone.