Best Power Bank for Travel

I still remember the exact moment I decided I'd never travel without a power bank again.

I was in Seoul, somewhere between Hongdae and my hotel, well after midnight, after a long evening of street food and wandering. My phone had just hit 4%. In a city where everything — the subway, the maps, the translation — runs through your phone, that number feels like a countdown. I couldn't read the Korean signs, I wasn't sure which subway line I needed, and Google Maps was the only thing standing between me and a very expensive taxi ride I hadn't budgeted for. I switched to airplane mode, killed every app, and speed-walked to the nearest convenience store hoping their phone charger shelf would save me.

It did — barely. But the next morning I walked into a shop near Myeongdong and bought a power bank before I did anything else.

Whether you're a solo traveler, a couple, or a frequent flyer, a portable charger isn't optional anymore. It's as essential as your passport holder. And after testing a bunch of them, I keep coming back to Anker. Here's everything you need to know before you buy.

Quick Picks

Why Anker? (And Not Just Any Brand)

I've tried cheap off-brand power banks before. One swelled up in my bag somewhere over the Atlantic. Another stopped holding a charge after three trips. Anker isn't flashy, but they make chargers that actually last, hold the capacity they advertise, and come with solid safety tech built in.

They're also one of the most trusted brands for airline compliance — which matters a lot more than most people realize.

The One Rule Every Traveler Must Know: Carry-On Only

Before we talk about which model to buy, this is the most important thing to understand about traveling with a power bank:

Power banks are not allowed in checked luggage. Period.

It doesn't matter which airline, which country, or how well you pack it. The FAA, IATA, and most airlines worldwide require all lithium battery power banks to go in your carry-on bag. Pack one in your checked suitcase and you risk having it confiscated at the gate — or worse.

Here's the capacity breakdown you need to know:

Most Anker power banks fall comfortably under 100Wh, so you're fine without any extra steps. But always double-check the Wh rating printed on the label before you fly — some airlines are stricter than others about the 100–160Wh range.

My tip: keep your power bank in your day bag or personal item during boarding, not buried at the bottom of your carry-on. Security staff occasionally ask to see it separately.

What to Actually Look for in a Travel Power Bank

Capacity (mAh) — how many full charges you get. A typical smartphone is around 4,000–5,000mAh. So a 10,000mAh bank gives you roughly two full charges.

Charging speed — look for 18W or higher (Power Delivery / Quick Charge). Slower banks exist, but waiting three hours for your phone to top up in an airport lounge is its own kind of frustration.

Weight and size — if it won't fit in your jeans pocket or day bag, you'll leave it at the hotel. The best travel power bank is the one you actually carry.

Number of ports — traveling as a couple? Two USB-A ports or a USB-C + USB-A combo means you're both charging at the same time.

Pass-through charging — lets you charge the bank and your device simultaneously from one wall outlet. Great when you're rushing to leave a hotel room.

Best Anker Power Banks for Travel

Note: Links below are Amazon affiliate links. I earn a small commission at no extra cost to you — it helps keep this site running.

Anker Zolo Power Bank 45MAX — Best Everyday Travel Pick

Anker Zolo Power Bank 45MAX

The thing that makes the Zolo 45MAX different is right there on top: two built-in braided cables — USB-C and USB-C — so you're never hunting for a cord at the bottom of your bag. The digital display shows exact battery percentage instead of the usual four-dot guessing game, which is a small thing that genuinely matters when you're rationing charge on a long travel day.

10,000mAh gets you roughly two full phone charges, and at 22.5W it charges fast enough to matter during a short airport layover. It's compact and light enough to drop in a jeans pocket, and the built-in cables mean one less thing to pack or forget.

Anker PowerCore Slim 10000 PD — Best for Minimalists Who Want Speed

Anker PowerCore Slim 10000 PD

Same capacity as the 523 but flatter — almost credit-card-thick. The real upgrade here is the 18W USB-C Power Delivery port, which means fast charging for modern iPhones and Android phones. If you hate slow trickle charges, pay the extra few dollars for this one over the standard slim.

I switched to this as my main travel bank after getting tired of plugging in and coming back to 60%. With PD, an hour of charging actually means something.

Anker 737 Power Bank (PowerCore 24K) — The Pro Pick That Charges Your Laptop

Anker 737 PowerCore 24K

This is the pro option — and the one you want if you travel with a laptop. The 737 puts out 140W over USB-C, which is enough to charge a MacBook or most Windows laptops at full speed. That's not something most power banks can claim. For anyone who works while traveling, that alone makes it worth the price.

24,000mAh gets you roughly five full phone charges, two tablet top-ups, or a meaningful boost to your laptop when you're stuck in an airport with no outlet in sight. The built-in display shows exact battery percentage and live wattage output — the kind of detail that's genuinely useful, not just a gimmick.

It's heavier than the other options here — around 600g — so it lives in your carry-on during flights rather than your day bag. But on long-haul trips, layovers, or multi-device travel, there's nothing better.

Airline note: At 88.8Wh, it's safely under the 100Wh carry-on threshold. No airline approval needed.

My tip: charge it fully the night before your flight. Land on the other side of the world with a charged phone, tablet, and laptop — and you'll wonder how you ever traveled without it.

Which One Should You Actually Buy?

Here's how I'd break it down:

• Solo traveler on a short city trip → Anker Zolo 45MAX or Slim 10000 PD
• Frequent flyer, long hauls, always-on traveler → Anker 737 (24K)
• Couples sharing one charger → Anker Zolo 45MAX (built-in cables, easy to share)

A power bank is one of those items where the one time you forget it, you really feel it.

Final Thoughts

A power bank won't make or break a trip, but a dead phone at the wrong moment absolutely can. That Seoul midnight scramble I mentioned at the start? In hindsight it's funny. In the moment, it wasn't. A good Anker bank, and that never happens to you.

If you're already building your packing list, PackMyTrip is a great place to start — you can customize it by destination and trip type so nothing gets left behind.

Which Anker model do you travel with, or are you still on the fence? Drop a comment — happy to help you pick the right one for your trip.