My Quadcopters esc has reset to lipo?

Hasersys

New member
Any one know what would cause my esc to reset to the defualt settings from factory? I notice that kust before my battery goes dead the last few flight, the right front motor begans to tilt down. Eventually causing a flip, or near flip. This is a minute or so before my alarm goes off. I had programed them to nicad. I am trying to figure out if it is possible for them to reset, and what would cause this.

These are red brick 30a esc. They have worked perfect untill now. Any suggestions would be greatly appreciated, thanks.