IATA dangerous goods, Table 2.3A describes in excruciating detail what you can and cannot bring into the cabin on a passenger aircraft, including the exact rules for lithium batteries - https://www.iata.org/contentassets/6fea26dd84d24b26a7a1fd5788561d6e/dgr-61-en-2.3a.pdf
Link is above or google IATA DG table 2.3A
Link is above or google IATA DG table 2.3A