You can bring it on board if you meet the following conditions.(The items should be carried with you and not included in your checked baggage.)
・The lithium content of the lithium battery is less than 2 g.
・The lithium-ion battery a watt-hour rating is no more than 100 Wh.
・Protected individually for prevention of malfunction.

 

However, please note that it cannot be used or charged on board.

Please check "International Flights) About the restricted articles in checked and carry-on baggage" for details.

 

In addition, the use and possession of these products may be restricted (prohibition) by laws of some countries,

so please check them yourself.