when in doubt- Anker's top 10 FAQ
- Can I take a portable charger with me on a flight?
Yes. Batteries with a capacity lower than 27,027mAh (100 watt hours) can be taken on board airplanes legally and safely.
However, government and commercial guidelines are subject to change so we recommend confirming with your airline prior to the date of flight.
but @elmo41683 calculation is correct.