A power bank can ride in your carry-on without asking the airline as long as its battery is rated at 100 watt-hours or less, according to the FAA’s PackSafe guidance, and spare lithium packs are never allowed in checked bags. That single number, printed on the case of most newer packs, is what separates an easy trip through security from a conversation at the gate. Anker’s Prime 26K, for example, lists 99.75Wh, just under the line, while a 40,000mAh brick usually lands above it.
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I travel with power banks for my phone, iPad, MacBook and Starlink Mini, and I’ve reviewed several on my channel. This guide sorts travel-friendly packs by the rule that matters most, watt-hours, then by what you need to charge. Specs come from the makers’ listings and my own reviews; any watt-hour figure I calculate is labeled as an estimate.
The airline rules in plain numbers
The FAA’s PackSafe page sets three tiers for rechargeable lithium-ion batteries carried as spares, which includes every power bank:
| Battery rating | Carry-on | Checked bag | Quantity |
|---|---|---|---|
| Up to 100Wh | Allowed | Not allowed | No FAA limit for personal use |
| 101–160Wh | Only with airline approval | Not allowed | Two spares per person |
| Over 160Wh | Not allowed as a spare | Not allowed | None |
The FAA also notes that many airlines, both domestic and international, set stricter limits on how many power banks each passenger can bring, so check your carrier before you fly. If a carry-on gets gate-checked, the power bank has to come out of the bag and stay with you in the cabin. Terminals should be protected from short circuits, which in practice means keeping the pack in a pouch and not loose with keys or coins.
How to find your power bank’s watt-hours
Newer packs print the Wh rating on the case. If yours only shows milliamp-hours, the FAA’s tip is to multiply voltage by amp-hours. Power bank cells are usually rated around 3.6 to 3.85 volts, so:
- 10,000mAh × 3.7V ÷ 1,000 ≈ 37Wh (estimate)
- 20,000mAh × 3.7V ÷ 1,000 ≈ 74Wh (estimate)
- 26,800mAh × 3.7V ÷ 1,000 ≈ 99Wh (estimate)
- 40,000mAh × 3.7V ÷ 1,000 ≈ 148Wh (estimate)
That math is why “about 27,000mAh” is the practical ceiling for a pack that flies without paperwork. Use the printed Wh figure whenever it exists, since that’s what gate agents check.
Travel power banks compared
| Power bank | Capacity | Max output | Carry-on status | Best for |
|---|---|---|---|---|
| Anker Prime 26K (A110A) | 26,250mAh / 99.75Wh | 300W total, 140W per port | Under 100Wh | Laptops, two devices at once |
| Anker Prime 20K (A110B) | 20,100mAh / 72.36Wh | 220W total, 140W per port | Under 100Wh | Lighter laptop kit |
| Anker 737 (PowerCore 24K) | 24,000mAh / ~86Wh (estimate) | 140W | Under 100Wh | Budget laptop charging |
| LENUTO MagSafe 10K | 10,000mAh / ~37Wh (estimate) | 22.5W | Under 100Wh | iPhone in-flight |
| LOVELEDI 15K | 15,000mAh / ~55Wh (estimate) | 5V 3.1A combined (USB-A) | Under 100Wh | Phones, earbuds, tablets |
| QUIDDITY Starlink Mini pack | 95Wh | 19V 5A DC | Under 100Wh | Starlink Mini |
| XTAR MP158 | 158Wh | 100W USB-C, DC for Starlink Mini | Needs airline approval | Road trips, not flights |
Figures come from Anker’s Amazon listings, the makers’ specs I quoted in my reviews, and FAA thresholds. Estimated Wh values assume about 3.7V per cell and should be checked against the label.
Picks by what you’re charging
For a laptop: Anker Prime 26K
Anker rates the Anker Prime Power Bank 26,250mAh 300W at 99.75Wh and calls it TSA-approved, which puts it right at the edge of what flies without approval. It has two USB-C ports and one USB-A port sharing 300W, with up to 140W from a single port over a 5A cable. Anker says it can bring a MacBook Pro (M4 Pro) to 50% in 27 minutes and charge a MacBook Pro (M4) about 0.8 times from full.
The feature that matters on a layover is input speed: Anker lists 250W dual USB-C input, reaching 50% in 13 minutes. It weighs about 600 grams per the listing. Anker’s own note says it is not compatible with the Starlink Mini, so pair it with a DC pack below if you carry one.
For a lighter bag: Anker Prime 20K
If you only need to top up one laptop, the Anker Prime Power Bank 20,100mAh drops to 72.36Wh and 510 grams. It still offers 140W from one port and 220W total across two USB-C and one USB-A. Anker lists a 100W USB-C input that reaches 50% in about 25 minutes.
For value: Anker 737
The Anker 737 Power Bank (PowerCore 24K) is the older 140W model. Anker says it meets airline carry-on requirements, measures 6.1 × 2.1 × 1.9 inches and weighs about 22 ounces. Anker rates it for about 4.13 charges of an iPhone 16 Pro or 1.33 charges of a 2024 13-inch iPad Pro. It has a smart display showing input and output power, like the Prime models.
For an iPhone in your seat: LENUTO MagSafe 10K
I took the LENUTO MagSafe battery pack on a flight, which you can see in the video above. It snaps onto MagSafe iPhones with N52 magnets, has a foldable kickstand for watching downloads on the tray table, and lists 22.5W fast charging with USB-C PD 20W and USB-A outputs. A 10,000mAh pack sits far below the 100Wh line, so it’s the least likely thing in your bag to raise questions.
For phones and earbuds: LOVELEDI 15K
In my LOVELEDI 15000mAh portable charger review, I charged an iPad and AirPods at the same time. It has two USB-A outputs plus USB-C and micro-USB inputs, and it’s small enough for a pocket. It isn’t a laptop charger, but it covers a phone-and-earbuds trip for little weight.
For Starlink Mini: QUIDDITY 95Wh
The QUIDDITY Starlink Mini battery pack lists 95Wh and a 19V, 5A DC output, so it powers the dish directly and stays under 100Wh. That makes it the travel-safe option if you plan to set up Starlink Mini at your destination. My XTAR MP158 review covers a larger 158Wh pack with a DC output, which is excellent on road trips but falls in the airline-approval tier.
Worked examples: will it last the trip?
These are estimates. Power banks lose energy converting from cell voltage to USB output, so I assume roughly 80–85% of the rated Wh reaches your device.
Example 1: Cross-country flight with a MacBook
A 99.75Wh pack at about 85% delivers roughly 85Wh to the laptop (estimate). A MacBook Air battery is in the low-50Wh range, so you’d get about one and a half charges, enough for a long flight plus a hotel morning before you find an outlet.
Example 2: Phone-only weekend
A 10,000mAh pack is about 37Wh. At 80% you get about 30Wh at the phone (estimate). Anker’s own numbers put a 24,000mAh pack at about four iPhone 16 Pro charges, so a 10K pack gives you roughly one and a half to two, which matches LENUTO’s “about two full iPhone charges.”
Example 3: Starlink Mini at the cabin
Starlink lists the Mini’s average draw at about 25–40W. A 95Wh pack at about 85% efficiency delivers about 80Wh, which works out to roughly two to three hours of use (estimate). For a full workday, recharge it from the car or bring a larger power bank or power station.
Packing checklist
- Confirm the Wh rating on the case is 100Wh or less, or get airline approval for 101–160Wh.
- Put every power bank in your carry-on or personal item, never the checked bag.
- Keep it in a pouch so the ports and terminals can’t short against metal.
- Check your airline’s own limit on how many power banks you can bring.
- If your carry-on is gate-checked, take the power bank out first.
- Bring the right cable: a 5A USB-C cable is needed for 140W laptop charging.
FAQ
What size power bank can I take on a plane?
Up to 100Wh in carry-on without approval, per the FAA. Packs from 101Wh to 160Wh need airline approval, with a limit of two per person.
Is a 20,000mAh power bank allowed on planes?
Yes, typically. At around 3.7V, 20,000mAh is about 74Wh, under the 100Wh line. Anker’s Prime 20K lists 72.36Wh.
Is a 26,800mAh power bank OK?
Usually, because it lands just under 100Wh. Anker’s Prime 26K lists 99.75Wh. Always check the printed rating.
Can I put a power bank in checked luggage?
No. The FAA requires spare lithium batteries, including power banks, to stay in carry-on baggage.
Can I use my power bank during the flight?
That depends on the airline. Some now restrict using or charging power banks on board, so check before departure.
Which travel power bank works with Starlink Mini?
One with a DC output in the Mini’s voltage range, like the 95Wh QUIDDITY pack. Anker notes its Prime 26K isn’t compatible with Starlink Mini.
Bottom line
For air travel, start with the watt-hour rating and stay at or under 100Wh. The Anker Prime 26K gives the most laptop power that still flies without approval, the Prime 20K trims weight, and a 10K MagSafe pack covers a phone in your seat. Starlink Mini travelers should pack a DC battery under 100Wh and leave the 158Wh units for road trips. For more charger options, browse my Mokin 140W GaN charger review for the wall side of your kit.