Appreciate that explanation.

Now that I have my car back, I do see the recharging upon deceleration at highway speeds that you mentioned, however I also noticed that in some situations (coasting on level ground around 45 mpg or so there is NO charging present; and when I had the big problems with my car there was heavy charging all the time (thus the 26 mpg).

Interestingly, my batteries never got below 3/4 charged when I was having this problem. If the dealer indeed did nothing and the problem magically went away, I would expect that they could tell me that perhaps they had it disconnected the car from all power for x amount of time and possibly reset the computer, etc. As I mentioned, all of the radio presets were gone as were the user settings within the computer.

Just seemed strange that they would not tell me anything, refused to let me have a look at the diagnostics report and paperwork which was about 1/2" thick.

I guess we'll see how others make out. So far it's been 'replaced cell' or 'there is nothing wrong'.