QUESTION

What is the best portable charger for long flights?

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Asked May 28, 2026Last updated June 14, 2026Answers can change over time.

Answer82% confidence

Best pick for long flights: Anker 737 Power Bank 24,000mAh. It hits the sweet spot for air travel: large capacity, USB-C fast charging, enough output for many laptops, and it stays under the common 100Wh airline battery limit.

If you want the most capacity while still staying near the airline limit, consider Anker Prime 27,650mAh. If you mainly charge a phone and earbuds, INIU 20,000mAh 65W is a better-value, lighter choice.

Before buying, check three things: the Wh rating printed on the charger, your airline’s battery rules, and whether your laptop needs more than 65W USB-C charging.

Our pick

Anker 737 Power Bank 24,000mAh 140W

Best for most long flights

Maars picked this for long-flight travelers who want one charger for a phone, tablet, and USB-C laptop: it offers a strong mix of capacity, fast charging, and carry-on-friendly size.

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At a glance

Compared picks

Swipe to compare

	Anker 737 24K	Anker Prime 27K	INIU 20K 65W	Anker 525 20K
Best use	Best overall for long flights	Maximum carry-on-friendly capacity	Best value for mixed devices	Simple phone-first travel charger
Capacity class	24,000mAh	27,650mAh	20,000mAh	20,000mAh
Laptop charging	Strong for many USB-C laptops	Excellent for high-power USB-C devices	Good for many lighter USB-C laptops	Limited compared with higher-watt picks
Portability	Heavy but still travel-friendly	Heaviest option here	More portable than the largest picks	Good for bags and long travel days
Main tradeoff	Costs more than basic power banks	Expensive and bulkier	Less total capacity and output than premium picks	Not ideal for power-hungry laptops

Also compared

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Anker Prime Power Bank 27,650mAh 250W

Best for power users

Maars picked this for travelers who want maximum carry-on-friendly capacity and very fast USB-C charging for demanding gear.

Search on Amazon

INIU 20,000mAh 65W Power Bank

Best value

Maars picked this for travelers who want strong charging without paying for a premium laptop power bank: it is a practical middle ground for phones, tablets, and lighter USB-C laptops.

Search on Amazon

Anker 525 Power Bank 20,000mAh

Best for phones and tablets

Maars picked this for travelers who mostly need phone and tablet backup power: it keeps things simpler while still offering enough capacity for a long flight.

Search on Amazon

Alternatives

Anker Prime 27,650mAh
Most capacity
A strong choice if you want to get as close as practical to the common 100Wh carry-on limit while keeping very high USB-C output.
INIU 20,000mAh 65W
Best value
Good for phones, tablets, handheld consoles, and some USB-C laptops without paying for ultra-high wattage.
Anker 525 Power Bank 20,000mAh
Best for phones only
Plenty for multiple phone charges, usually more compact and simpler than laptop-focused power banks.

What could change this answer

Airline battery rules can vary.
Most airlines allow power banks under 100Wh in carry-on luggage only, but you should verify your airline’s current policy before traveling.

Found this helpful?

More buying options

May include affiliate links

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Our pick

Anker 737 Power Bank 24,000mAh 140W

Best for most long flights

Maars picked this for long-flight travelers who want one charger for a phone, tablet, and USB-C laptop: it offers a strong mix of capacity, fast charging, and carry-on-friendly size.

Search on Amazon

At a glance

Compared picks

Swipe to compare

	Anker 737 24K	Anker Prime 27K	INIU 20K 65W	Anker 525 20K
Best use	Best overall for long flights	Maximum carry-on-friendly capacity	Best value for mixed devices	Simple phone-first travel charger
Capacity class	24,000mAh	27,650mAh	20,000mAh	20,000mAh
Laptop charging	Strong for many USB-C laptops	Excellent for high-power USB-C devices	Good for many lighter USB-C laptops	Limited compared with higher-watt picks
Portability	Heavy but still travel-friendly	Heaviest option here	More portable than the largest picks	Good for bags and long travel days
Main tradeoff	Costs more than basic power banks	Expensive and bulkier	Less total capacity and output than premium picks	Not ideal for power-hungry laptops

Also compared

Search on Amazon

Anker Prime Power Bank 27,650mAh 250W

Best for power users

Maars picked this for travelers who want maximum carry-on-friendly capacity and very fast USB-C charging for demanding gear.

Search on Amazon

INIU 20,000mAh 65W Power Bank

Best value

Maars picked this for travelers who want strong charging without paying for a premium laptop power bank: it is a practical middle ground for phones, tablets, and lighter USB-C laptops.

Search on Amazon

Anker 525 Power Bank 20,000mAh

Best for phones and tablets

Maars picked this for travelers who mostly need phone and tablet backup power: it keeps things simpler while still offering enough capacity for a long flight.

Search on Amazon

Alternatives

Anker Prime 27,650mAh
Most capacity
A strong choice if you want to get as close as practical to the common 100Wh carry-on limit while keeping very high USB-C output.
INIU 20,000mAh 65W
Best value
Good for phones, tablets, handheld consoles, and some USB-C laptops without paying for ultra-high wattage.
Anker 525 Power Bank 20,000mAh
Best for phones only
Plenty for multiple phone charges, usually more compact and simpler than laptop-focused power banks.

What could change this answer

Airline battery rules can vary.
Most airlines allow power banks under 100Wh in carry-on luggage only, but you should verify your airline’s current policy before traveling.

Found this helpful?

More buying options

May include affiliate links

Search Amazon Search eBay

What is the best portable charger for long flights?

Anker 737 Power Bank 24,000mAh 140W

Compared picks

Anker Prime Power Bank 27,650mAh 250W

INIU 20,000mAh 65W Power Bank

Anker 525 Power Bank 20,000mAh

Alternatives

What could change this answer

Anker 737 Power Bank 24,000mAh 140W

Compared picks

Anker Prime Power Bank 27,650mAh 250W

INIU 20,000mAh 65W Power Bank

Anker 525 Power Bank 20,000mAh

Alternatives

What could change this answer

Tags

Anker 737 Power Bank 24,000mAh 140W

Compared picks

Anker Prime Power Bank 27,650mAh 250W

INIU 20,000mAh 65W Power Bank

Anker 525 Power Bank 20,000mAh

Alternatives

What could change this answer

Anker 737 Power Bank 24,000mAh 140W

Compared picks

Anker Prime Power Bank 27,650mAh 250W

INIU 20,000mAh 65W Power Bank

Anker 525 Power Bank 20,000mAh

Alternatives

What could change this answer

Tags

Anker 737 Power Bank 24,000mAh 140W

Compared picks

Anker Prime Power Bank 27,650mAh 250W

INIU 20,000mAh 65W Power Bank

Anker 525 Power Bank 20,000mAh

Alternatives

What could change this answer

Anker 737 Power Bank 24,000mAh 140W

Compared picks

Anker Prime Power Bank 27,650mAh 250W

INIU 20,000mAh 65W Power Bank

Anker 525 Power Bank 20,000mAh

Alternatives

What could change this answer

Anker 737 Power Bank 24,000mAh 140W

Compared picks

Anker Prime Power Bank 27,650mAh 250W

INIU 20,000mAh 65W Power Bank

Anker 525 Power Bank 20,000mAh

Alternatives

What could change this answer

Anker 737 Power Bank 24,000mAh 140W

Compared picks

Anker Prime Power Bank 27,650mAh 250W

INIU 20,000mAh 65W Power Bank

Anker 525 Power Bank 20,000mAh

Alternatives

What could change this answer

Ask Maars another question

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