To complement your drone footage what kind of accessories do you carry?

Extra Batteries? How many is enough?
Filters? Which ones?

Besides these obvious ones what else do you carry with you at all times when filming with your drone?

Hi, thanks for creating this thread. I would recommend bringing extra batteries if you'll be doing long videoes and also different types of filters which will allow slower shutter speed for cinematic video and limit the light condition. Thank you for the support.