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Smart bag / battery suitcase
Power bank must be removable
Documented data setWhen checking the bag, a removable lithium battery must be removed and carried in the cabin. A non-removable battery above 2.7 Wh makes the bag prohibited.
Non-removable button cells or very small batteries are exempt from this prohibition threshold only up to 0.3 g lithium metal or 2.7 Wh lithium ion.
Source basis