2004 Saturn Vue Battery Light

Hey guys I have been right in the past but now I am stumped. My battery light keeps coming on and going out. I have recently the battery replaced as the CCA where down after replacing it two years early. With the battery under warranty we found the incorrect battery was put in. I had it replaced under warranty with the correct one. Now the battery light comes on when you start it. If you turn the car off then restart it the light goes out. I replaced the OEM terminal conncetors as they were the flat ones but not corroded with the old style thinking that maybe the conncetion was bad. That seemed to work but now it comes on and goes out again. When it comes on during driving it goes out after a short time. Any clue as to what is causing this light to come on? I have had the electrical chargin system checked twic and both times I am told the alternator is charging to the maximum but yet the light keeps coming on. Help. Is there a sensore for this that can go bad? Thank you.