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Last updated: Oct 25, 2026
Short answer: Under US TSA and FAA rules, a power bank (spare lithium-ion battery) must stay in carry-on, never checked bags. Packs rated up to 100Wh are allowed without airline approval. Packs 101–160Wh need airline approval and are limited to two spares per person. Anything over 160Wh stays off passenger aircraft. Gate agents go by the Wh printed on the pack, not the big mAh number on the Amazon title. One pack under 100Wh is the path of least drama for US and most international trips in 2026.
TSA vs FAA: who actually sets the power bank rule?
TSA’s “What Can I Bring?” page for power banks (updated May 14, 2025) is blunt: carry-on yes, checked bags no. It points you to FAA guidance for the energy limits. The FAA’s passenger-battery page is the source for the 100Wh / 160Wh thresholds most travelers memorize. Individual airlines can be stricter than the FAA baseline, and international carriers may follow ICAO updates that limit how many packs you carry and whether you can recharge one onboard.
Practical translation at the checkpoint:
- Keep the power bank out of any bag that might get gate-checked.
- If your roller gets tagged at the jet bridge, pull the pack out and keep it with you in the cabin.
- Protect terminals from short circuits (original sleeve, pouch, or tape over exposed contacts).
- Do not fly with a swollen, damaged, or recalled pack.
Watt-hours in plain English (the number that matters)
Airlines and the FAA care about watt-hours (Wh), not milliamp-hours (mAh). Formula when Wh is missing from the label:
Wh = (mAh × V) ÷ 1000
Use the cell’s nominal voltage (often 3.6V or 3.7V), not the USB output voltage. Examples from packs people actually fly with:
- 10,000mAh × 3.7V ÷ 1000 ≈ 37Wh — fine everywhere we checked
- 25,000mAh × 3.6V ÷ 1000 = 90Wh — still under 100Wh with headroom
- 26,250mAh × 3.8V ÷ 1000 = 99.75Wh — legal without approval, but so close that a worn label can get a second look
Rough rule of thumb: at ~3.7V, 100Wh is about 27,000mAh. Titles that scream “30,000mAh” are often over 100Wh once you convert — always check the printed Wh.
| Wh rating (on label) | US FAA baseline | What to do |
|---|---|---|
| 0–100Wh | Allowed as spare in carry-on; no airline approval required | Default travel choice. One good pack beats two mediocre ones. |
| 101–160Wh | Airline approval required; max two spare batteries per passenger | Email or call the airline before you leave. Some carriers simply say no. |
| Over 160Wh | Not allowed on passenger aircraft | Ship ground freight or leave it home. Do not check it. |
Source: FAA “Airline Passengers and Batteries” and TSA power-bank guidance. Airlines may be stricter. No search volumes invented for this guide.
Airline rules that are stricter than the FAA baseline
Policies change. Confirm on your carrier’s site the week you fly. Patterns travelers hit in 2025–2026 coverage:
- Quantity caps: Some airlines limit you to one or two power banks even under 100Wh.
- Visibility / stowage: Several carriers want the pack under the seat or in the seat pocket — not buried in an overhead bin — so crew can reach it if it overheats.
- Onboard use: Some airlines ban using a power bank during the flight; others allow charging phones from the pack but ban recharging the pack from the seat outlet.
- International ICAO update (reported effective 27 March 2026): International flights may limit passengers to two power banks in the cabin and ban recharging power banks during the flight. Watt-hour thresholds did not change in the reports we reviewed.
Practical takeaway: Charge the pack fully before boarding. Plan to charge your phone from it, not the other way around. One labeled pack under 100Wh clears the most checklists.
Pre-flight checklist (print or screenshot)
- Read the Wh on the physical label (not just the product box).
- Confirm pack is under 100Wh, or you have written airline approval for 101–160Wh.
- Pack it in the bag that stays with you at the gate.
- Cover terminals; leave damaged/swollen packs at home.
- Skim your airline’s battery page for quantity and in-flight use rules.
- If connecting internationally, assume the stricter of the two carriers applies.
Airline-friendly product picks (under 100Wh)
These are the same capacity band we recommend in our best travel power banks 2026 roundup — chosen because their stated Wh ratings sit under the FAA no-approval line. Prices move; we do not invent prices here. Check the current Amazon listing and the Wh printed when the unit arrives.
1. Anker Prime Power Bank (26K, 300W) — max laptop power under 100Wh
Anker rates this at 26,250mAh / 99.75Wh with up to 140W per USB-C and 300W total. It is as close to the FAA line as most travelers should go. Make sure the Wh label is readable at the gate.
Anker Prime Power Bank (26K, 300W)
99.75Wh · laptop-class output · verify label before flying
2. UGREEN Nexode 25000mAh 145W — laptop pick with Wh headroom
UGREEN’s sheet lists 25,000mAh at 3.6V = 90Wh, with a single USB-C port up to 140W. More margin under 100Wh than a 99.75Wh flagship if you want less gate-agent drama.
UGREEN Nexode Power Bank 25000mAh 145W
90Wh · 140W USB-C · solid under-100Wh laptop option
3. Anker Nano Power Bank (10K, 30W, built-in USB-C) — phone / everyday travel
About 37Wh class — well under every US and airline limit we reviewed. Built-in USB-C cable plus extra ports. Not a laptop charger; ideal when you only need phone and earbuds top-ups.
Anker Nano Power Bank 10,000mAh 30W (built-in USB-C)
~37Wh · light carry-on staple · model A1259 family
4. INIU 10000mAh 45W mini / Pocket Rocket class — lightest phone pack
10,000mAh / ~36–37Wh class with up to 45W USB-C on current INIU mini listings. Confirm the exact model name and Wh on the unit you receive; SKUs rotate.
INIU Mini / Pocket Rocket 10000mAh 45W Power Bank
Flight-safe capacity band · pocketable · re-check Wh on arrival
ASIN candidates verified via Amazon product URLs on Oct 25, 2026 (WebSearch). Listings and variants change — confirm title and Wh before publishing or buying. No hard prices in this draft.
FAQ
Can I put a power bank in checked luggage?
No. TSA and FAA treat power banks as spare lithium batteries: carry-on only. If a bag is gate-checked, remove the pack first.
Does TSA care about mAh or Wh?
The energy limit is in watt-hours. mAh alone is not enough. Convert or read the Wh printed on the pack.
Is a 26,800mAh power bank TSA approved?
“TSA approved” is marketing language. What matters is whether the pack is under 100Wh (or 101–160Wh with airline approval) and packed in carry-on. A 26,800mAh pack at 3.7V is about 99Wh — usually fine, but the label decides.
How many power banks can I bring?
FAA: no hard number under 100Wh for personal use; max two spares in the 101–160Wh band with approval. Many airlines impose lower caps (one or two total). Check your ticketed carrier.
Can I use a power bank on the plane?
Depends on the airline. Some ban onboard use entirely; others allow phone charging from the pack but ban recharging the pack mid-flight. Default plan: board with a full pack.
Bottom line
For US travelers in 2026, the safe default is one clearly labeled power bank under 100Wh in your personal item or backpack, terminals protected, charged before boarding. Use the Anker Prime or UGREEN Nexode when you need laptop watts; use a 10K Anker Nano or INIU when you only need a phone. For model-by-model output and weight detail, see our travel power bank roundup. Always re-check TSA, FAA, and your airline the week you fly.
