I must say that these battery complaints are wearing me out. No offense intended to any of the posters. There are battery complaints all over this forum and others.
Consider this
Both you and your friend have identical corvettes. He filled up two days ago and so did you. He calls you today and tells you that he is out of gas. "I can only go two days on a tank of gas! What is going on?" Of course, you have a half tank of gas left and tell him that is not right. "You should get at least 4 days on a tank of gas." Take this analogy a step further. He says "This happened to me last week too. So I turned off the radio and the car seems to go a little further. But I am still only getting 2 days on a tank."
Anything wrong with this discussion? Wouldn't you need to know a little more before concluding that it is his car that is causing the problem? That is why when we measure a car's energy use we report in "miles per gallon". Now apples can be compared to apples.
Since you know that both cars have an electronic readout that reports miles per gallon, you ask him "what is you MPG reading?" He says "15mpg". Your reading is 15mpg too. Now you know that the cars perform the same. Upon further investigation, you learn that he has been driving from Washington D.C. to New York City each day. You only go to the grocery store.
If you get 15 mpg and he gets 10 mpg, you can begin to find out what is causing the difference. Maybe he has a leaking gas tank, may his fuel system is dirty, maybe he leaves his car idle for 2 hours each morning. Or maybe he sits in traffic for 2 hours each night. Once you find the source of the problem, you can correct it. If it is the leaking gas tank, you get it fixed.
If you get 15 mpg and he gets 14mpg, you might be looking at tire inflation or air conditioning, etc. You would just need to "tweak" the car. But a tweak will not help much if your gas tank is leaking.
Moral: If you want to improve battery life, you must measure your battery drain properly.
I have posted a procedure for monitoring your battery here -
http://forum.ppcgeeks.com/showthread...758#post452758. In additon, you will find much good information in that thread.