After I installed my Secretaudio I noticed the battery would run down if the car sat for a while. I double checked my wiring and measured the draw. It was pulling 50ma when off. I even sent the radio back to the factory where they verified that it was within specs. At 50ma, in a 24 hour period that's over a full AMP Hour.
Add the regular spiked draw from the clock winder solenoid since I had the clock fixed and it doesn't take to long to significantly drain the battery.
I added a battery cutoff and now live with resetting the stations and clock when I take the car out.