a short commute or constant stop and go traffic will almost always lead to a weak/dead 12V battery. same if you car sits for long periods.
aaah...this is probably what is happening to ME as well.
Was about to post a similar issue with my battery seemingly kaput on the regular these days. I was wondering if there was some small mood light pulling power that I had not realized had been left on or something weird like that.
I already figured it was my own fault, though, as I don't drive much or far when I do, and in Los Angeles traffic no matter what,-- (I was so bummed that the drive to Idyllwild could not be done in the Crz last weekend just because it could never have handled the last bit of dirt road once there. It was tough on the GMC Sierra as it was, and almost called for a 4wd just to get from that main road to the house, so the low slung zed would have been literally impossible, but SO would have loved the rest of it all in my crz!) -- but I tend to sit in the car whenever I get back home and have the accessories going because a) the stereo in this thing is awesome, b) the seat is so comfortable, c) I just really REALLY like being in my crz so much and since I don't drive often or far and I like it so much, I'm always disappointed when I get where I am going and hate getting out again.
Add this to the fact that I left the dome lights on once when it sat for several days, and also accidentally drained the battery without realizing that the blower was on after putting in the key and then consulting my phone to get directions amd info on where I was going, AND the one note made by the inspector about this car when I bought it used just a few months ago (its a 2013 EX, original stock everything) was the slightly low battery -IMA, I think, which would affect the charge priority - reading, it suddenly seems like fate that I invested in a portable emergency power jump starter thingy from Costco shortly before acquiring this car.
I have put that jumper through it's paces in the short time I have had the car. It would seem that I have likely ensured the total death of the 12v with my habits and absent mindedness. Also, I have sat in it in the driveway listening to music until the stereo quit on me more than once, and failed to trickle charge immediately after (though I will know to do this in the future, since its bound to happen again. In fact, I'm typing this post whilst in my driveway right now, but at least the engine is idling this time.)
i went from a 70 mile round trip commute to a 3 mile round trip commute. i now put the car on a battery charger/tender on the weekends to keep the battery happy.
A new battery is seemingly a given then at this point, but It may behoove me to adopt a similar strategy to the weekly tender as a preventative measure, try and treat the new battery a little better considering the size and charging handicaps it faces. I was experiencing similar early battery death on the civic too with the lack of driving taking a toll even without the abuse the Crz gets with me just sitting in it all the time.
Is there any other precaution I can take to lessen the probable purchase of another new one in two more years with the minimal driving I do? Capacity increase or something?