Last week my son left his modern sedan parked in front of our house for a couple of days. When he returned to retrieve it and was ready to leave he discovered the battery was dead. At that particular moment the only other car at home was the ol' TT, so I used it to jump start his car (it's 12 volt - sorry to you purists).
As I was doing it a thought occurred to me: You'd NEVER have this problem in a properly running stock Model T. Jumper cables would NEVER be needed! So much for modern cars!
Hope you lent him the cables. If it went dead in your relatively moderate clmate in a few days his batt could be shot.
Thanks Charlie. I appreciate the comment, but the battery is almost brand new. The car has mysteriously done this once every 6 or 8 months since he bought it (its a 2005 Acura TL that he purchased in 2007). He's had it in to the dealer several times but they can't seem to locate the problem. I think it's something that fails to turn off and drains the battery, but what it is remains elusive.
To maintain balance, I also drive a 2005 Acura TL. No such problem.
YOu might check and see if it is a Carquest battery, if so, replace it with any other brand and you will see an improvement.
Best
Gus
PS I always carry a 9 volt radio battery in my 1942 Ford GPW, if the battery dies, I wire the 9 volt battery to the coil and crank start it with the ignition off, after a few minutes, I turn on the ignition, and if it keeps running, the battery in the jeep is good enough and I can remove the 9v.
Check and see if the little courtesy lights on / by the mirror are on. Hard to see them in the daytime!
Also, check to see if the parking lights are on by mistake.