There are a few things I am willing to risk forgetting on an international trip.
A portable charger is absolutely not one of them.
Your phone becomes basically your entire life when you are traveling. It is your boarding pass, Google Maps, camera, translator, restaurant reservation, Uber, Apple Pay, entertainment for an eight-hour flight, and the place where you saved the address of the hotel you now desperately need to find.
Which means watching your battery hit 12% in a foreign country is not exactly the relaxing vacation experience I am looking for.
A portable charger is now one of the first things that goes into my personal item before an international flight. But I also do not want to carry around a giant brick just because it technically has enough power to charge my phone six times.
For travel specifically, I care about four things: battery capacity, size, charging speed, and how many extra cords I need to bring with it.
These are the portable chargers I would consider for international travel and long-haul flights, including compact options for sightseeing, larger power banks for long travel days, and chargers powerful enough to handle more than just a phone.
If you do not want to read the whole comparison
- Best overall for travel: VEGER 10,000mAh with built-in cables
- Best for long flights: Anker 20,000mAh power bank
- Best compact charger: INIU 10,000mAh 45W
- Best for laptops: UGREEN Nexode 20,000mAh 100W
- Best high-capacity option: Anker 20,000mAh 87W
For most travelers, though, I think the sweet spot is 10,000mAh to 20,000mAh. That is enough capacity to be genuinely useful without turning your personal item into a collection of electronics.
1. VEGER 10,000mAh with built-in cables
Best for: international trips, everyday sightseeing, and anyone who hates carrying extra cords.
This is the portable charger I included in my list of 15 Amazon carry-on essentials, and it is still one of my favorite designs specifically for traveling.
The biggest reason is incredibly simple: the cables are built in.
I am constantly trying to reduce the number of tiny things floating around in my carry-on. If I can eliminate an extra charging cable, that is a win.
The VEGER combines a 10,000mAh battery with built-in charging cables and multiple outputs. That means I can charge my phone without first finding the cable that has inevitably worked its way to the absolute bottom of my bag.
A 10,000mAh capacity is also where I think portable chargers become especially practical for travel. It is enough battery to be useful on a long travel day while still being reasonable to carry around once you actually arrive. I do not want my "portable" charger to feel like I am carrying a second phone made entirely of lead.
Why I like it for international travel
The built-in cables are the selling point for me.
When I am walking around Paris, sitting on a train in Italy, or trying to find my gate at Heathrow, I do not want a power bank connected to a six-foot cord dangling out of my bag. This is much more of a throw-it-in-your-purse-and-go option.
2. Anker 20,000mAh power bank
Best for: overnight flights, long layovers, and trips where you will go a long time without an outlet.
If 10,000mAh is my everyday travel sweet spot, 20,000mAh is what I would consider for serious travel days.
Anker makes several power banks in this range, including models with built-in USB-C cables and fast charging.
The obvious advantage is capacity. If I am flying Chicago to Europe, have a layover, use my phone throughout the flight, land, take a train, and then navigate to a hotel, that is a very different battery situation from running errands around Chicago for three hours. A larger power bank gives you considerably more breathing room.
Current Anker 20,000mAh models also offer enough output to charge compatible tablets and other larger devices, depending on the version you choose.
Why I like it for long-haul travel
It is the option I would choose when battery anxiety outweighs my obsession with packing light. You sacrifice some portability compared with a 10,000mAh charger, but in exchange you get significantly more backup power.
Best choice if your itinerary regularly involves long flights, layovers, trains, or multiple devices.
3. INIU 10,000mAh 45W
Best for: travelers who pack light and want something small enough for an everyday purse.
This is the category I think a lot of people actually want.
I do not necessarily need the biggest portable charger available. I want the smallest charger that still has enough battery to be genuinely useful.
The INIU combines a 10,000mAh capacity with up to 45W fast charging in a compact design. That is an attractive combination, because you are getting the capacity I would recommend for everyday travel without automatically moving into giant-power-bank territory.
Why I would choose it
Once I arrive at my destination, my portable charger moves from my carry-on into whatever purse or crossbody I am carrying that day. That changes the equation.
A charger can seem perfectly reasonable inside a travel backpack and suddenly feel enormous when you are trying to fit it alongside sunglasses, lip gloss, a wallet, and everything else in a smaller bag.
Best choice if you are primarily charging a phone and want to pack as lightly as possible.
4. UGREEN Nexode 20,000mAh 100W
Best for: remote workers, business travelers, and anyone bringing a laptop internationally.
If your charging needs extend beyond your phone, pay attention to output, not just battery capacity.
The UGREEN Nexode combines a 20,000mAh battery with up to 100W charging and multiple ports, making it much better suited to compatible laptops and higher-powered devices than a basic phone charger.
This is probably more charger than I need for a normal vacation. But if I am traveling with a laptop and planning to work from airports, trains, cafes, or anywhere else where access to an outlet is not guaranteed, the extra power suddenly makes a lot more sense.
Why I like it for working while traveling
It consolidates the backup-power situation. Instead of having one portable charger that is useful for a phone but completely irrelevant when a laptop starts dying, you can bring one more powerful option.
Best choice if your laptop is coming on the trip and you actually plan to use it.
5. Anker 20,000mAh 87W with built-in USB-C cable
Best for: travelers who want more capacity and power without jumping all the way to a huge laptop power bank.
This is where things get interesting.
A higher-output Anker 20,000mAh model with a built-in USB-C cable essentially combines two things I like about the other options: the convenience of an integrated cable and the larger capacity of a long-haul power bank.
It can also deliver substantially more power than a basic portable phone charger, making it more versatile if you are traveling with a phone, tablet, handheld gaming device, or compatible laptop.
Why I would upgrade to this
If I were taking a longer international trip with several devices, this is the type of charger I would consider instead of carrying multiple smaller power banks. It is not as tiny as the 10,000mAh options, but you are getting considerably more capability.
Best choice if you want one powerful charger to handle most of your trip.
6. Belkin BoostCharge 10K
Best for: topping up more than one device without carrying a 20,000mAh brick.
Sometimes I do not need another gadget with 14 features. I just want something straightforward that works with the electronics I am bringing.
The Belkin BoostCharge 10K is a 10,000mAh battery from a brand that has been making this category for a long time, which counts for something in a market full of names you have never heard of.
The multi-device thing happens to me constantly while traveling. It is never just my phone. It is my phone and headphones. Or my phone and my watch. Or my phone and someone else's phone, because apparently I am now responsible for the group's electricity.
Why I like it
At 10,000mAh this is a top-up battery rather than a shared power supply, and it is worth being clear about the difference. It will comfortably get a phone and a pair of headphones through a long day. It will not run two people through a transatlantic flight and a train connection. For that, go back to one of the 20,000mAh options above.
What you get in exchange is a charger you will actually keep in your bag once you arrive, which is the failure mode of every power bank that is too big.
Check the port layout on the listing before you buy, since Belkin sells several 10K models and they are not all configured the same way.
10,000mAh or 20,000mAh: which is better for travel?
This is probably the biggest decision to make when buying a portable charger. And for most people, I think the answer is pretty simple.
Choose 10,000mAh if:
- You primarily need to charge your phone
- You want something that moves easily from your carry-on into a purse or crossbody
- You care about keeping your travel bag light
- You expect regular access to outlets at your hotel
Choose 20,000mAh if:
- You are taking long-haul flights or dealing with long layovers
- You are traveling with several devices
- You are sharing the charger with someone else
- You are bringing a tablet or compatible laptop
- You would rather carry extra weight than worry about running out of battery
For a typical international vacation, I would personally choose 10,000mAh for portability. For a complicated travel day, or a trip where I am working, I would strongly consider 20,000mAh.
What I look for in a portable charger
There are approximately one million power banks online, and many of them look almost identical. These are the features I actually care about.
Built-in cables. Probably my favorite travel-specific feature. Fewer cables mean fewer things to pack, lose, untangle, or forget in a hotel room.
USB-C charging. Most newer electronics are moving toward USB-C, so I would prioritize a charger with USB-C input and output if you are buying something new.
Fast charging. A huge battery is not particularly useful if it takes forever to actually transfer that power to your phone. Look at charging output in watts rather than focusing exclusively on mAh.
Size and weight. This matters more than people think. A portable charger spends a lot of time being carried rather than used. I would rather sacrifice some capacity for a charger I am actually willing to keep in my purse all day.
Battery capacity. For travel, I think 10,000mAh is the best starting point. Smaller power banks can work for emergencies, but international travel is one of the situations where I want a meaningful amount of backup power.
Where it goes in your bag, and why that is not optional
This is the part people get wrong, and it is the one with actual consequences at security.
Under FAA rules, spare lithium batteries and power banks must travel in your carry-on. Not your checked bag. If your carry-on gets gate-checked at the jet bridge, you are expected to take the power bank out and keep it with you in the cabin.
Capacity matters too. Up to 100 watt-hours needs no approval. Between 101 and 160 watt-hours you need your airline's approval and are generally limited to two. Above 160 watt-hours is not allowed on passenger aircraft at all. Watt-hours are volts multiplied by amp-hours, and newer batteries have the rating printed on them.
Airlines can be stricter than the FAA, and some have recently added their own rules about keeping a power bank visible while it is in use rather than buried in a bag. Check your specific airline before you fly.
The rule that catches people out is not the size limit. It is that a power bank can never ride in checked luggage.
Final thoughts
A portable charger is one of the few travel products I consider genuinely essential.
I can survive without a travel pillow. I can survive without packing cubes. I would strongly prefer not to navigate an unfamiliar city with a dead phone.
For most international travelers, I think 10,000mAh is the sweet spot, particularly if you are primarily charging your phone. It is enough backup power to make a difference without turning your purse into a weightlifting exercise.
If you are dealing with long flights, multiple devices, or a laptop, move up to a 20,000mAh power bank with higher USB-C output.
And if you are like me and the idea of keeping track of another charging cable is already annoying you, I would start with the VEGER with built-in cables. It is simple, practical, and solves the exact problem I want a travel product to solve.
Frequently asked questions
Can I bring a portable charger on an international flight?
Yes, but where you pack it matters.
Under current FAA rules, spare lithium batteries, including power banks and portable chargers, must be carried in carry-on baggage and cannot be placed in checked luggage. If your carry-on gets gate-checked, remove your power bank and keep it with you in the cabin.
International and individual airline rules can be more restrictive, so check your airline before traveling.
What size portable charger is allowed on a plane?
The FAA currently allows lithium-ion batteries rated 0 to 100 watt-hours (Wh) on passenger aircraft without special airline approval. Batteries from 101 to 160 Wh require airline approval, and you are generally limited to two of them. Batteries above 160 Wh are prohibited on passenger aircraft.
This is why you should check the Wh rating printed on the actual power bank, particularly when buying a very high-capacity model.
Is a 20,000mAh power bank allowed on a plane?
Many typical 20,000mAh consumer power banks fall below the FAA's 100Wh threshold, but mAh alone is not enough to determine compliance, because watt-hours also depend on voltage.
The FAA says you can calculate watt-hours by multiplying volts by amp-hours: Wh = V x Ah. The Wh rating should also be marked on newer lithium-ion batteries.
Always check the rating printed on your specific charger and your airline's rules.
Should I get a 10,000mAh or 20,000mAh portable charger for travel?
I would choose 10,000mAh for most vacations and 20,000mAh for long-haul or device-heavy trips.
A 10,000mAh charger is easier to carry around while sightseeing. A 20,000mAh charger gives you more backup power but comes with additional size and weight.
Can I put my portable charger in my checked luggage?
No. Under current FAA guidance, power banks and other spare lithium batteries must travel in your carry-on baggage, not checked luggage.
What happens if my carry-on gets gate-checked?
Take the portable charger out.
The FAA specifically instructs passengers to remove spare lithium batteries and power banks from bags that are being gate-checked and keep them in the aircraft cabin.
This is another reason I keep mine in my personal item rather than my rolling carry-on.
How many mAh do I need for an international flight?
For most people, I would start at 10,000mAh.
It is a good balance between capacity and portability. If you are facing a particularly long itinerary, multiple connections, or you are charging several devices, 20,000mAh may be worth the additional weight.
Can a portable charger charge a laptop?
Some can, but you need to pay attention to USB-C output wattage and your laptop's charging requirements.
A small phone-focused power bank may technically have plenty of battery capacity but not enough output to properly charge a laptop. That is why higher-output options such as 65W or 100W USB-C power banks are more appropriate for compatible laptops.
Should I buy a portable charger with built-in cables?
For travel, I am a big fan.
Built-in cables mean one less thing to pack and make it much easier to charge your phone while you are walking through an airport or sightseeing.
The tradeoff is that a replaceable cable is easier to swap if it gets damaged, so there are advantages to both designs.
What is the best portable charger for international travel?
For most travelers, I would prioritize a 10,000mAh power bank with USB-C fast charging and a compact design.
For my particular travel style, the VEGER's built-in cables make it especially convenient because it removes another cord from my carry-on.
For long-haul travel or multiple devices, I would step up to a 20,000mAh model instead.
About L. Preston
I write about the practical, unglamorous parts of living well: the home systems, the closet math, the products worth the counter space.
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