Hi Jon,
Isn't the little red light supposed to go out after a few seconds, indicating that the device (for remotely opening garage door or electric gates) is ready to use. There is something in the handbook about setting it up I think. The light is very small (like the flashing flashing alarm light) and shouldnt drain the battery. If its faulty and staying on; it could interfere with the alarm, so njust disconect it by prizing off the panel and pulling the wires, and see if that cracks it!
Good luck!