This is a big question because dealer who sold me the Phantom told me to always discharge battery fully and replace with a full one before every flight. And if i don't want to do it is better not to turn off the quad/battery. Now in my work i often come to situations where i need to take off, make video/take photos (use 20% of the battery), land and move to different locations without of possibility to charge batteries in between flights. So, can i for example discharge one battery up to 40%, turn quad off and use the same battery again for next flight? I am not concerned for the battery itself as for the thing he told me that there is some kind of bug and if i turn on battery that is for example at 40% there is a possibility that it will shut off and the Phantom will go down. Anybody doing this or have some experiences?