I walk out to my car at 6 am to my car not unlocking with the viper alarm. I have the viper 791vx, my fob has batteries and neither one will work at all, It just beeps repeatedly as if it is getting not signal. It started acting up a little and then nothing at all. I had to hit the button and have not activated the alarm at all for about a week. Considering I have a z1 and alot of stereo equipment in the car, this is not good at all....I have the back up battery and my clock seems to reset every couple days....I goes back to 1200 when I start the car up...Weird because I always can just start the car right up