They say this -
Batteries, spare/loose, including lithium metal or lithium ion cells or batteries, for portable electronic devices must be carried in carry-on baggage only. For lithium metal batteries the lithium metal content must not exceed 2 g and for lithium ion batteries the Watt-hour rating must not exceed 100 Wh. Articles which have the primary purpose as a power source, e.g. power banks are considered as spare batteries. These batteries must be individually protected to prevent short circuits. Each person is limited to a maximum of 20 spare batteries.
edit - According to this calculation, does it mean I can take it?
Normaly if you cover the connector there should be no Problem…
However most of the airport stuff dont know about the laws so maybe print out something official that says what you are allowed to do and include your calculations.
There are also many famous People on Youtube that already talked about that.
Each airlines company is implementing those general rules that are similar for most of them. Just remember to check carefull and cross check with them. You already checked the limiting Watt factor and the condition on which you have to put your battery:
cover the electrical pin
put each battery separately in a LiPo bag
some suggest also to have them at their storage voltage status
Of course due to the sensitive item ill also suggest to print out the company rules and come with some extra time at the airport. You won’t want to loose your drone or your flight.