There was just a big debate on this the other day and turned into a flame war . Certain people say it does not have a battery voltage detection and according to a spokes person for Spektrum they don`t . But I on the other hand have 7 Spektrum recievers and they all seem to go into failsafe mode when the reciever pack gets low . If you are not getting into failsafe on a low battery I would put an inline failsafe that does have the low voltage detection as an extra measure .