Can the a battery be inside the drone, also I have three other batteries that I will leave in my drone back pack. I am going to carry it on the plane as a carry on, should I be okay with the airlines.

I would put each individual battery in a separate bag and not fully charged with some cover over the terminals.Someone will chime in soon

Hello Imacer24, just like Gosports 1 said, before carrying the Intelligent Flight Battery on an airline flight, it must be fully discharged firstly. Besides, it's suggested to double check the details with the airline for some special rules.