I would say more of a battery problem than anything else.......... i normally onlu push 4 flights until i put the battery on quick charge........ 3 flights is a normal for each plane...... sounds from your desciption complete loss of control that its pointing at the battery fault....... ive had interference before but it made me loose partial control i still had some movement but a dead batt would be complete loss.........

Hope you get back in the air soon