I just had the same issue with the Aero. I put the JR gauges in last year and they have a line to the 12v hot all the time under the fuse box. I went out this morning to fire it up for the first time in about 3 or 4 weeks and it just went click click. This is the first time it has ever done this, but I usually also leave a battery minder connected to it when it sits. Guess I wont forget that again...