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Best Portable Power Banks for Long Flights: 6 Picks for 2026
Long flights can drain your phone, tablet, and laptop batteries faster than expected. Whether you’re travelling internationally, working remotely, watching movies, or keeping your devices ready for airport transfers, having a reliable portable power bank can make a big difference.
Not every power bank is suitable for air travel, though. Some are too heavy, some don’t offer enough charging capacity, and others may exceed airline battery restrictions.
The ideal travel power bank should offer a good balance of battery capacity, charging speed, portability, and airline compatibility.
In this guide, we’ve selected six portable power banks worth considering for long flights in 2026. From lightweight options for smartphones to powerful models designed for laptops, there’s an option for different types of travellers.
📋 Table of Contents
- 6 Best Portable Power Banks for Long Flights (Quick Comparison)
- 1. Anker Nano Power Bank — Best Compact Power Bank for Flights
- 2. Anker 737 Power Bank — Best for Phones and Laptops
- 3. Anker Prime Power Bank — Best High-Capacity Option
- 4. UGREEN Nexode 25,000mAh — Best for Laptop Charging
- 5. NITECORE NB10000 Gen4 — Best Lightweight Power Bank
- 6. INIU 25,000mAh 100W Power Bank — Best High-Capacity Value Option
- How to Choose the Right Power Bank for a Long Flight
- How Many Times Can a Power Bank Charge a Smartphone?
- Frequently Asked Questions
- Final Thoughts
6 Best Portable Power Banks for Long Flights
| Power Bank | Best For | Capacity | FAA Compliant | Check Price |
|---|---|---|---|---|
| Anker Nano Power Bank | Compact travel charging | 10,000mAh | ✓ ~37Wh | Anker Nano (10,000mAh) |
| Anker 737 Power Bank | Phones, tablets and laptops | 24,000mAh | ✓ 86.4Wh | Anker 737 (PowerCore 24K) |
| Anker Prime Power Bank | High-capacity charging | 27,650mAh | ✓ 99.54Wh | Anker Prime 27,650mAh |
| UGREEN Nexode Power Bank | Laptop & multi-device | 25,000mAh | ✓ ~92.5Wh | UGREEN Nexode 25,000mAh |
| NITECORE NB10000 Gen4 | Lightweight travel | 10,000mAh | ✓ ~39Wh | NITECORE NB10000 Gen4 |
| INIU 25,000mAh Power Bank | High-capacity value | 25,000mAh | ✓ ~92.5Wh | INIU 25,000mAh 100W |
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1. Anker Nano Power Bank — Best Compact Power Bank for Flights
When travelling, carrying less equipment can make a journey more comfortable. The Anker Nano 10,000mAh power bank is designed for people who want a compact charger for everyday devices.
Its 10,000mAh capacity makes it suitable for keeping a smartphone powered during airport transfers, connecting flights, and long journeys. The built-in USB-C cable on the A1259 version also means you don’t necessarily need to carry an additional charging cable.
With up to 30W output, it is a convenient option for compatible smartphones and other smaller USB-C devices.
Key highlights:
- 10,000mAh battery capacity.
- Up to 30W USB-C charging.
- Built-in USB-C cable.
- Compact design for everyday travel.
- Suitable for smartphone-focused charging.
Best for: Travellers who want a small, convenient power bank without carrying a heavy charging accessory.
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2. Anker 737 Power Bank — Best for Phones and Laptops
If you travel with a smartphone, tablet, and USB-C laptop, a larger power bank can be more useful than a compact phone charger.
The Anker 737 Power Bank, also known as the PowerCore 24K, offers a 24,000mAh capacity and high-output USB-C charging. Its 140W maximum output makes it suitable for compatible laptops as well as phones and tablets.
A digital display provides useful information about charging power and remaining battery capacity, helping travellers understand how much power is available.
Its 86.4Wh rating is below the FAA’s 100Wh threshold, although airline-specific restrictions should still be checked.
Key highlights:
- 24,000mAh capacity.
- Up to 140W USB-C output.
- Digital battery and charging display.
- Supports compatible laptops and mobile devices.
- 86.4Wh battery rating.
Best for: Business travellers, digital nomads, and people who need to charge laptops during long journeys.
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3. Anker Prime Power Bank — Best High-Capacity Option
For travellers who want substantial battery capacity in one portable charger, the Anker Prime 27,650mAh model is worth considering.
It offers a high-capacity battery with a combined output of up to 250W, making it suitable for charging multiple compatible devices. It is particularly useful for people travelling with power-hungry laptops, tablets, and smartphones.
Its 99.54Wh rating places it just below the FAA’s 100Wh threshold. However, it is a relatively heavy option, so it makes more sense for travellers who genuinely need the extra capacity.
Key highlights:
- 27,650mAh capacity.
- Up to 250W combined output.
- High-capacity charging for multiple devices.
- Digital display.
- Approximately 99.54Wh battery rating.
Best for: Frequent flyers, professionals, and travellers carrying several electronic devices.
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4. UGREEN Nexode 25,000mAh — Best for Laptop Charging
A long-haul flight can become a mobile office for remote workers. If you plan to work on presentations, edit documents, or handle business tasks while travelling, a laptop-compatible power bank can be a useful addition.
The UGREEN Nexode 25,000mAh power bank offers up to 145W total output and supports high-speed USB-C charging for compatible devices.
Its capacity is approximately 92.5Wh, keeping it below the FAA’s 100Wh threshold. The high output makes it a practical choice for travellers who need more than basic smartphone charging.
Key highlights:
- 25,000mAh capacity.
- Up to 145W total output.
- USB-C charging for compatible laptops.
- Multiple device charging support.
- Approximately 92.5Wh battery rating.
Best for: Remote workers, laptop users, and travellers who need to stay productive during long journeys.
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5. NITECORE NB10000 Gen4 — Best Lightweight Power Bank
Not every traveller needs a large battery pack. For people who prioritise lightweight luggage, the NITECORE NB10000 Gen4 offers a more compact alternative.
With a 10,000mAh capacity and a lightweight carbon-fibre construction, it is designed for portability. Its compact form makes it suitable for travellers who want to keep their phones and smaller electronic devices charged without adding much weight to their bags.
It is especially appealing to minimalist travellers, hikers, and backpackers who pay close attention to the weight of their equipment.
Key highlights:
- 10,000mAh capacity.
- Lightweight carbon-fibre construction.
- Compact travel-friendly design.
- Up to 22.5W maximum output.
- Approximately 39Wh battery rating.
Best for: Minimalist travellers, backpackers, and people who prefer lightweight travel accessories.
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6. INIU 25,000mAh 100W Power Bank — Best High-Capacity Value Option
If you want substantial battery capacity without moving into the most expensive premium category, the INIU 25,000mAh 100W power bank is another option to consider.
Its 100W USB-C output supports compatible laptops, tablets, and smartphones. The large capacity is useful for longer journeys when access to a charging outlet may be limited.
At approximately 92.5Wh, it sits below the FAA’s 100Wh threshold. Check the exact model and battery rating on the product itself before flying, as specifications can differ between product generations.
Key highlights:
- 25,000mAh capacity.
- Up to 100W USB-C output.
- Suitable for compatible laptops and smartphones.
- High-capacity portable charging.
- Approximately 92.5Wh battery rating.
Best for: Travellers looking for a high-capacity charger for multiple devices.
How to Choose the Right Power Bank for a Long Flight
Before purchasing a portable charger, consider how many devices you carry and how long you expect to be away from a power outlet.
🔋 1. Choose the Right Capacity
10,000mAh: Suitable for smartphones and lightweight travel.
20,000mAh: A useful balance for phones, tablets, and some laptop top-ups.
25,000mAh: Better suited to travellers who carry multiple devices or need laptop charging.
⚡ 2. Check USB-C Power Delivery
Charging speed matters when you have limited time between flights or during a short layover. Look for USB-C Power Delivery (PD) support. A 30W model can be suitable for many smartphones, while compatible laptops may require 65W, 100W, or more.
⚖️ 3. Consider Size and Weight
A high-capacity power bank may sound attractive, but it can add considerable weight to your carry-on bag. If you only need to charge a smartphone, a 10,000mAh option may be more practical.
✈️ 4. Check Airline Restrictions
Lithium-ion batteries are strictly regulated. Always verify the battery’s watt-hour (Wh) rating printed directly on the casing before flying to prevent confiscation at airport security.
⚠️ Important Airline Battery Restrictions (FAA Passenger Guidance):
- Up to 100Wh: Generally permitted in carry-on baggage without airline approval.
- 101–160Wh: Requires airline approval and is subject to quantity limits (usually max 2 spares).
- Above 160Wh: Not permitted under standard passenger luggage allowances.
- Cabin Only Rule: All spare power banks must be carried in carry-on baggage. They are strictly prohibited in checked luggage.
How Many Times Can a Power Bank Charge a Smartphone?
The number of charges depends on your phone’s battery size, the power bank’s usable capacity, and energy losses during charging.
As a general illustration, a 10,000mAh power bank may provide around one to two full smartphone charges, while a 20,000mAh model may provide several charges.
These are estimates rather than guaranteed results. Actual performance varies with the phone, battery condition, charging speed, and power bank efficiency.
💡 Real-World Energy Efficiency Tip
Lithium-ion cells have a nominal internal voltage of 3.7V. When charging devices via USB (at 5V, 9V, or 20V PD), voltage conversion circuitry and thermal dissipation consume roughly 15% to 25% of energy. A 10,000mAh power bank typically yields around 6,500mAh to 7,500mAh of actual deliverable output.
Frequently Asked Questions
1. What is the best power bank capacity for a long flight?
For most travellers, 10,000mAh to 20,000mAh offers a useful balance between portability and charging capacity. People carrying laptops may prefer a higher-output 20,000mAh to 25,000mAh model, provided it complies with airline restrictions.
2. Can I carry a 20,000mAh power bank on an airplane?
A typical 20,000mAh lithium-ion power bank is approximately 74Wh at a nominal cell voltage of 3.7V. This is well below the FAA’s 100Wh threshold. However, check the rating printed on the actual power bank and your airline’s specific rules.
3. Can I put a power bank in checked luggage?
No. Under FAA passenger guidance and international aviation safety regulations (ICAO/IATA), spare lithium batteries, including power banks, must be carried in carry-on baggage and cannot be placed in checked luggage.
4. Can a power bank charge a laptop during a flight?
Yes, if the power bank supports the laptop’s charging requirements and the airline permits its use. Check the USB-C output wattage, Power Delivery compatibility, and airline rules before travelling.
5. Is a 10,000mAh power bank enough for international travel?
For smartphone-focused travellers, 10,000mAh can be sufficient for everyday backup charging. If you travel with multiple devices or spend long periods away from charging outlets, a 20,000mAh model may be more suitable.
6. What should I look for when buying a flight-friendly power bank?
Prioritise a clearly marked watt-hour rating, a suitable battery capacity, USB-C charging, reliable safety features, manageable weight, and compatibility with your devices. Also verify the airline’s current battery policy.
Final Thoughts
A reliable power bank can make long flights more comfortable, especially when you depend on your phone, tablet, or laptop throughout the journey.
The Anker Nano is a convenient option for lightweight smartphone charging, while the Anker 737 and UGREEN Nexode are worth considering for travellers who need laptop power. For people who want higher capacity, the Anker Prime and INIU models offer more substantial charging options. The NITECORE NB10000 Gen4 is a strong choice when keeping luggage light is the priority.
Before choosing, think about your devices, charging needs, and travel style. Most importantly, check the battery’s watt-hour rating and your airline’s rules before heading to the airport.
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