Is a 20,000mAh Power Bank Allowed on Flights?
Yes. A 20,000mAh power bank is allowed on virtually all commercial flights worldwide. Here's why:
The Math
Using the standard conversion formula:
Wh = (mAh × Voltage) ÷ 1,000
20,000mAh × 3.7V ÷ 1,000 = 74 Watt-hours
The global IATA limit for unrestricted carry is 100Wh. At 74Wh, a 20,000mAh power bank is well under this threshold -- no special approval needed.
Rules You Still Need to Follow
Even though 20,000mAh power banks are allowed, you must:
Popular 20,000mAh Power Banks and Their Wh Ratings
| Power Bank | Rated Capacity | Wh | Status |
|---|---|---|---|
| Anker PowerCore 20000 | 20,000mAh | 74Wh | Allowed |
| Xiaomi Mi Power Bank 3 | 20,000mAh | 74Wh | Allowed |
| Samsung Battery Pack 20000 | 20,000mAh | 74Wh | Allowed |
| Baseus Blade 20000 | 20,000mAh | 74Wh | Allowed |
| RAVPower 20000 | 20,000mAh | 74Wh | Allowed |
Note: Some manufacturers list 20,000mAh at the cell level but the actual energy may vary slightly based on internal voltage. Always check the Wh rating on the label if available.
Airlines with Extra Restrictions (Even for 20,000mAh)
While the capacity is universally allowed, be aware of these 2026 restrictions:
Bottom Line
A 20,000mAh power bank is one of the most popular travel sizes precisely because it's well under the limit while offering enough charge for multiple phone refills. It's the sweet spot for air travel.
Use our free calculator to verify any power bank against your specific airline's rules.
Sources
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