Can I Bring a 20000mAh Power Bank on Ryanair Flights?

Updated 2026-07-29 · Power Bank Guide

If you're packing for a trip, you probably have a few questions about ryanair power bank rules. The short answer is yes, you can bring a 20000mAh power bank on a Ryanair flight, but there are strict safety regulations regarding where you pack it and its total energy capacity.

The most critical rule is that power banks must be carried in your hand luggage only. Because lithium-ion batteries are flammable if they short-circuit or overheat, they are strictly prohibited in the aircraft hold (checked luggage). If security finds a power bank in your checked suitcase, it will likely be confiscated.

Understanding the 100Wh Limit and Ryanair Power Bank Rules

Airlines and aviation authorities (like the TSA and EASA) don't measure battery capacity in mAh (milliamp-hours) because that doesn't account for voltage. Instead, they use Wh (Watt-hours). The general limit for most airlines, including Ryanair, is 100Wh per battery without special prior approval.

To figure out if your battery is compliant, use this formula: Wh = (mAh ÷ 1000) × Voltage. Since almost all portable chargers use internal 3.7V cells, a 20000mAh bank is calculated as: (20000 ÷ 1000) × 3.7 = 74Wh.

Because 74Wh is well under the 100Wh threshold, a 20000mAh charger is perfectly legal for carry-on. If you are looking for a reliable, compliant option, the INIU 20000mAh Portable Charger (Flight-Safe) is an excellent choice. It is designed to meet these safety standards while remaining pocket-sized, making it a stress-free addition to your travel bag.

How Many Charges Will a 20000mAh Bank Actually Give?

It is a common mistake to assume a 20000mAh bank can charge a 5000mAh phone exactly four times. In reality, power banks lose energy during the voltage conversion process (stepping up from 3.7V to 5V or higher) and through heat dissipation. Real-world efficiency is typically around 60% to 70%.

For a modern smartphone with a 4,000mAh to 5,000mAh battery, you can generally expect 2.5 to 3.5 full charges from a 20000mAh unit. This means you can keep an iPhone 17, Samsung, or Google Pixel powered for several days of sightseeing without needing a wall outlet.

Powering Laptops, Tablets & Gadgets

When choosing a power bank for your flight, you need to consider the wattage (W). This determines how fast a device charges and whether it can power high-drain electronics. A 22.5W USB-C PD (Power Delivery) output is a versatile mid-range speed that works for a variety of gear.

Here is what a 22.5W power bank, such as the INIU 20000mAh Portable Charger (Flight-Safe), can and cannot handle:

• Smartphones & Earbuds: Fully supported. It will fast-charge most Androids and iPhones at their maximum or near-maximum intake.
• Tablets & iPads: Supported. While some iPad Pros can handle 30W+, 22.5W will still charge them effectively, though slightly slower.
• Nintendo Switch & Steam Deck: Supported. These handhelds typically charge well at 18W-25W, making a 22.5W bank a great travel companion.
• Cameras & Smartwatches: Fully supported. These devices have low power requirements and will charge quickly.
• Laptops: Limited. Most MacBooks and Windows laptops require 45W to 100W to charge while in use. A 22.5W bank might slowly trickle-charge a laptop while it is completely powered off, but it generally cannot keep a laptop running during active work.

Tips for Traveling with Portable Chargers

To ensure you don't have any issues at the boarding gate or security checkpoint, follow these practical steps:

First, ensure the capacity markings on the side of your power bank are legible. If the text has rubbed off and the security officer cannot verify the Wh or mAh rating, they have the right to confiscate the device for safety reasons.

Second, avoid using your power bank to charge devices during takeoff and landing, as cabin crew often request all electronics be stowed or powered down. Third, keep your charger in a dedicated tech pouch to prevent the ports from accidentally triggering or shorting against metal objects like keys or coins in your bag.

FAQ

Can I bring more than one power bank on Ryanair?

Generally, yes, as long as each individual battery is under 100Wh. However, excessive quantities of batteries may be flagged as commercial goods or safety hazards. For most travelers, two or three banks are perfectly acceptable.

Do I need to declare my power bank at security?

Usually, you do not need to declare a power bank unless requested. However, it is a good idea to keep it easily accessible in your carry-on so you can pull it out if the security agent asks to see the capacity rating.

What happens if my power bank is over 100Wh?

Batteries between 100Wh and 160Wh typically require airline approval and are limited to two units per person. Anything over 160Wh is generally prohibited on passenger aircraft. Always confirm the specific limit with Ryanair's current policy before flying.