i have a dragonfly 2 with direct drive tail rotor
wen my battery get down to 8.4-8.6 volt a green and red light starts flashing on my pha-01 then the heli shuts off
i took the pha 01 back to the store i bough it from and they sent it to some place to get tested and he said it was fine.
my setup
dragonfly 2
pha-01
6 ch gws receiver
2 narow +f hp bb servos
gws dream starter 2
and He Cell 7 cell 8.6 NiMH battery
thnx Mike