What is the best travel charger?

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The best travel charger is one small enough that you always carry it. Look for four things: a size that fits a pocket or wallet, a built-in cable, the right connector for your phone, and a battery under 100 watt-hours (Wh), so it can fly in your carry-on without airline approval.

Key facts

  • Carry it daily: a charger left at the hotel does not help.
  • A built-in cable means one less thing to forget.
  • Match the connector: USB-C or Lightning.
  • Under 100 Wh flies in a carry-on with no approval (FAA, TSA).
  • Power banks never go in checked bags.

What should I check before I buy?

Size: a charger that fits your pocket or wallet comes with you every day.

Cable: a charger with its own cable cannot be separated from it.

Connector: newer iPhones (iPhone 15 and later) and most Android phones use USB-C; older iPhones use Lightning.

Airline rules: power banks must be in your carry-on, and up to 100 Wh needs no approval. Sources: FAA PackSafe: Lithium Batteries (checked 2026-10-30); TSA What Can I Bring: Power Banks (checked 2026-10-30).

Small charger or big power bank?

A big power bank suits long days with no outlets or charging a laptop. A small charger you always carry suits commutes, airports and city days. Many travelers keep one of each.

How do I check a charger's watt-hours?

Look for Wh on the label. If it shows only mAh, use Wh = mAh × volts ÷ 1,000. A 10,000 mAh bank at 3.7 V is 37 Wh.

Where does TravelCard Plus fit?

The TravelCard Plus from TravelCard LLC is a phone charger the size of a credit card with the cable built in. Its battery is 3,500 mAh, about 13 Wh (3.7 V nominal), far below the 100 Wh carry-on limit, so it needs no airline approval. It ships free and carries a one-year unconditional warranty. More answers: all Travel Guides.

Frequently asked questions

Can I take a travel charger on a plane?

Yes, in your carry-on. Power banks are not allowed in checked bags, and up to 100 Wh needs no airline approval.

Do I still need a wall plug?

You need a way to recharge the charger itself, usually any USB port or USB wall adapter.

Which connector do I need?

USB-C for iPhone 15 and later and most Android phones; Lightning for older iPhones.

What about international flights?

Many airlines set their own limits on power banks. Check your airline's page before you fly.

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