What is the best portable charger for long flights?

For long flights, the best portable charger is usually a high-capacity USB-C PD power bank that stays within airline carry-on limits — ideally around 90–100Wh, which gives you near-max capacity while remaining travel-friendly on most airlines.

What to look for:

• Carry it in your carry-on bag; don’t pack spare power banks in checked luggage.
• Choose 100Wh or less for the simplest travel experience.
• Prefer USB-C Power Delivery (PD), and if you’ll charge a laptop, look for 45W–100W+ output.
• A clear Wh rating printed on the case helps at security.

A good practical target is a power bank in the ~27,000mAh / under-100Wh range with fast USB-C PD. That size is usually the sweet spot for long flights because it gives the most usable energy while staying within common airline rules.

Good options to consider are:

• A high-quality ~99Wh USB-C PD power bank for maximum travel-friendly capacity.
• The Anker 737 PowerCore 24K if you want a strong all-around choice for phones, tablets, and many laptops.
• A slim 20,000mAh-class USB-C PD power bank if portability matters more than maximum runtime.