Hi,
Every anafi-battery is abt 20 Wh.
The formula is (Number of Cells x 50% charged x Rated power i A x Voltage)" -> So Anafi battery is (2Cell x 0,5 x 2,7A x 7,6v) = 20,5 Wh each at 50% charged.
That is well under the IATA stated 100w for bringing on as cabinbagage. (In Lo-Po bag)