Well, started the roadster to let her warm, and found the coupe dead... Should have pulled the braille battery, as it didn't seem to like being on a tender. May not get it back. Trying to slow charge it, but not much luck so far...so may be done. No luck with these little batteries. I am going back to full size. Hopefully I can find my receipt and they will warranty it. Bummer.
Update: I used the rubber mount for my Dashdaq/zeitronics, as it got cold in the garage, it fell off the windshield and turned itself on, which led to the dead battery. I jumped started the car and found it on. Turned it off, let the car run awhile after taking the jumpers off. As soon as I turned the dashdaq back on, it killed the car. Battery was dead, down to 5 volts. She will not hold more than 5 volts after charging for hrs. Got to be careful not to leave anything on while charging...lesson learned. I usually unhook them, but got lazy this year...