Power Banks on Planes: Quantity, Wh and 2026 Rules
Carry power banks in the cabin. Check the two-unit rule, Wh label, airline restrictions and the March 2026 change before flying.
Sources and scope
Source-based research; no hands-on test or specialist review claimed.
Two power banks; no onboard recharging; distinguish the 2026 provision from 2027 changes.
ICAO change of 27 March 2026, IATA guidance valid through 31 December 2026
Page 4: personal use; national adoptionSource review: · Codex (AI source review)
Cabin carriage, short-circuit protection and damaged battery restrictions.
US dangerous-goods guidance; carrier restrictions can be stricter
Size limits; Quantity limits; Damaged or recalled batteriesSource review: · Codex (AI source review)
Keep power banks in the cabin, including when a cabin bag is gate-checked. Before departure, check the printed watt-hour rating, quantity and the operating airline's current policy. “Under 100 Wh” alone does not settle every rule.
What changed in March 2026
IATA's operator guidance dated 31 March 2026 explains the ICAO change effective 27 March: at most two power banks per person, carried in the cabin with terminals protected, and no recharging the power bank onboard. It also recommends not using one to charge another device onboard. A recommendation and a prohibition are different; airlines can impose stricter conditions.
The guidance discusses differences in national adoption. It retains an operator-approval provision for 100–160 Wh power banks in the 2026 ICAO framework, while explaining that this provision will not carry into IATA's 2027 edition. Do not assume that an airline accepts such a power bank today, or describe the 2027 change as already universal.
Decide using the actual label
| Check | Action |
|---|---|
| Printed Wh and model are readable | Compare them with the operating carrier's battery policy |
| Over 100 Wh | Obtain explicit acceptance before travel; some carriers have a lower cap |
| No clear rating | Ask the manufacturer for model-specific documentation; do not infer it from a product title |
| Cabin bag must go in the hold | Remove the power bank first |
| Damaged, swollen or recalled battery | Do not travel with it; follow the manufacturer's handling instructions |
The FAA lithium battery guidance explains US transport limits, protection against short circuits and the removal of spare lithium batteries/power banks from checked bags. National guidance is not a guarantee of acceptance by every airline.
mAh is not enough
Watt-hours equal amp-hours multiplied by the battery's nominal voltage. For a label that actually states 20,000 mAh and 3.7 V, the calculation is 20 × 3.7 = 74 Wh. Using the USB output voltage or guessing 3.7 V can produce a wrong answer. Prefer the manufacturer's printed Wh value.
Keep the label accessible and obtain approval before arriving at the airport where required. For purchasing criteria and exact model distinctions, see travel power banks. This is a source-based screening guide, not a laboratory safety assessment.
Frequently asked questions
Is there no quantity limit for power banks under 100 Wh?▾
That is no longer a safe general statement. The March 2026 ICAO change described by IATA limits personal power banks to two per person; confirm your airline and national implementation.
Can I recharge a power bank onboard?▾
The March 2026 change prohibits recharging the power bank onboard. Using it to charge another device is a separate question; IATA recommends against it and airlines may prohibit it.
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