Hi friends. Can i carry DJI phantom 3 with 1 extra battery in domestic flights.  First time i had carried from mumbai to delhi and from delhi to leh. Everything was fine while going I had my return flight from srinagar. Even srinagar airport allowed. I had tough time at delhi airport. The security called me at the area where all check in baggages are scanned. Finally in 15-20 minutes all everything was sorted and they allowed the drone and battery in check-in baggage. I had already kept them seperately. Even in mumbai everything was fine. Post that i am scared to carry drones in flight. Now i want to take drone in domestic flights as well as international flights. Please help me with the following questions:

1. Is drone (without batteries) allowed to be carried in hand baggage? or only checkin baggage?
2. Batteries are allowed in hand baggage or check-in baggage?
3. I read many thread where it says, people have paid customs duty and fine. But i have bought this in india, i carried it from mumbai and then bringing it back to mumbai. Why should i pay customs?
4. Internationally i plan to take it germany, france, swiss, etc in europe. Has anyone experienced what are the issues when u carry them in international flights?

1 u can't carry it with ur hand carry u have to put it in the luggage
2 if u have a battery bag it will be much better to travail with it 
3 now different country's have different rules regarding drones u have to check it out 
4 and yes u will be question for the same at all the airports so u should have proper parers for it

@rimplesanchla

Hi, recently  I was traveling out of India and was carrying a small 250 size drone , Just like you I thought if I have bought it in India I should be allowed to bring it back as long the custom endorses  It ( as I have done before with few expensive electronic items ) but to my surprise  when  I asked the custom desk In Mumbai they seem very ignorant  and gave a vague reply " all drone going in or out of the country is illegal & will be seize ) when asking for fore information they pointed me to a sign board for customs ...   
In return they asked if I could help them to buy some alcohol from duty free
....
BY the way I was  carrying the drone is my hand baggage .
sometimes I have been told to carry the lipo in hand luggage by the carrier .
Its always best to talk to ur carrier first regarding their rules for Lipo , also it goes without saying that  all lipo  should be in storage mode
& In a lipo fireproof bag .

cheers 

Thank you so much guys! Looking at the issues i feel like selling my drone Whats the use if there are so many hassles to carry it.