Is powerbank allowed in hand baggage?

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Tags

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2. #purpose
3. #carry
4. #airlines
5. #baggage
6. #spare
7. #considered
8. #luggage
9. #safety
10. #allow
11. #protected
12. #individually
13. #carried
14. #cargo
15. #carriage
16. #short
17. #power
18. #passengers
19. #actually
20. #batteries
21. #banks