26800mAh Power Bank on a Plane? Wh & Airline Rules
Page updated · Sources and review method
At 3.7 V, 26,800 mAh is 99.16 Wh. That is within the common 100 Wh threshold, but airline and route conditions still apply.
The voltage matters.
These examples assume a 3.7 V nominal battery. Read your actual label: the same mAh at a different voltage gives a different Wh. USB charging output is not the nominal battery voltage.
This guide covers capacity, not certification, recalls or the condition of your particular product.
Power bank flight checker
Within the general 100 Wh capacity threshold. Select your airline to check its specific restrictions.
Why is 26,800 mAh close to the limit?
At 3.7 V, 26,800 mAh is 99.16 Wh—only 0.84 Wh below 100 Wh. That makes the actual label especially important. Do not round capacity up to 27,000 mAh or round an over-limit result down to 100 Wh. Use the printed Wh rating when available.
Can a 26,800 mAh bank exceed 100 Wh?
Yes. At 3.85 V the same 26,800 mAh calculates to 103.18 Wh. That changes the capacity category: an airline capped at 100 Wh does not accept it under that policy. Where a current policy permits higher-capacity banks, obtain approval before travel; the mAh number alone is not enough.
Should I rely on an airline-approved product label?
A retailer’s travel claim cannot override an operating airline’s rules. Confirm the exact model’s Wh label, the permitted number of banks and any country certification. For January 2027 journeys, also check the forthcoming IATA restriction linked below rather than assuming a 2026 approval pathway remains available.
Last checked 2026-11-04
How that capacity compares by airline
Capacity guidance at 3.7 V. Open an airline’s page for quantity and onboard restrictions.
| Airline | Capacity result | Quantity |
|---|---|---|
| American Airlines | Carry-on only | 2 |
| United Airlines | Confirm with the airline | Confirm |
| Delta Air Lines | Carry-on only | 2 |
| Southwest Airlines | Carry-on only | 1 |
| Emirates | Carry-on only | 1 |
| Qatar Airways | Carry-on only | 2 |
| British Airways | Carry-on only | 2 |
| Lufthansa | Carry-on only | 2 |
| Korean Air | Carry-on only | 2 |
| Singapore Airlines | Carry-on only | 2 |
| Cathay Pacific | Confirm with the airline | 2 |
| ANA | Carry-on only | 2 |
| Japan Airlines | Carry-on only | 2 |
| AirAsia | Confirm with the airline | Confirm |
| Etihad Airways | Carry-on only | 1 |
Power bank flight FAQs
Quick answers before you pack.
Why is 26,800 mAh close to the limit?
At 3.7 V, 26,800 mAh is 99.16 Wh—only 0.84 Wh below 100 Wh. That makes the actual label especially important. Do not round capacity up to 27,000 mAh or round an over-limit result down to 100 Wh. Use the printed Wh rating when available.
Can a 26,800 mAh bank exceed 100 Wh?
Yes. At 3.85 V the same 26,800 mAh calculates to 103.18 Wh. That changes the capacity category: an airline capped at 100 Wh does not accept it under that policy. Where a current policy permits higher-capacity banks, obtain approval before travel; the mAh number alone is not enough.
Should I rely on an airline-approved product label?
A retailer’s travel claim cannot override an operating airline’s rules. Confirm the exact model’s Wh label, the permitted number of banks and any country certification. For January 2027 journeys, also check the forthcoming IATA restriction linked below rather than assuming a 2026 approval pathway remains available.
How many Wh is 26,800 mAh?
At 3.7 V it is 99.16 Wh. Use the actual nominal battery voltage to calculate your device’s rating.
Can a 26,800 mAh power bank go in checked luggage?
No. Power banks must stay in the cabin regardless of capacity.