So i have a calico jack m4 that has a falcon electronics system was working fine then all the sudden now i can only shoot it for about 30 seconds then it stops and beeps 5 times and thats all it will do, if i unplug it and plug it back in then i can shoot again but it then does the same thing. It runs 9.6v 1500 mah num chuck batteries. I have no clue where to start.