Ok thanks so I have three ac batteries so I could run all three without worrying about the rc chargeIf you look at the P4P specs the DJI stated power consumption is 1.2A at 7.4v and it has a 6Ah 2cell lipo (i.e. 7.4v nominal). In theory it can run for 5 hours on a fully charged pack in good condition. That's 15 flights of 20mins.
Agreed, I usually do about 8-10 flights before I plug in the RC.Easily.