Is a 27,000mAh Power Bank Allowed on a Plane?
It's borderline. A 27,000mAh power bank at 3.7V equals exactly 99.9Wh -- just 0.1Wh under the 100Wh IATA limit. Technically, it should be allowed. But being this close to the threshold creates practical risks.
The Math
27,000 × 3.7 ÷ 1,000 = 99.9Wh
The IATA limit for unrestricted carry is 100Wh. So 99.9Wh is technically compliant.
The Problem
While 99.9Wh is under 100Wh on paper, there are practical concerns:
What to Do
If you have a 27,000mAh power bank:
Popular 27,000mAh Power Banks
The Anker PowerCore 26800 is one of the most popular power banks in this category. At 26,800mAh and 3.7V, it comes in at 99.16Wh -- safely under the limit. Anker specifically designed this capacity to be the maximum allowed for unrestricted air travel.
The Safe Alternative
If you want maximum capacity without any risk, look for power banks in the 25,000-26,800mAh range. These give you 92.5-99.2Wh -- enough margin that no security officer will question it, while still providing substantial charging capacity.
Use our free calculator to check your exact power bank model.
Sources
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