alternator question

[ahlem]

My 3.0 x5 shows 119 on code 9 which indicates my new battery only has 11.9 volts. I put it on the charger to see if it shows anything different. Just hooked it up and shows 119 still. Should I charge it overnight and test it again? The production date is 3/2000 and has one button to reset the mileage and no second button. I'm trying to determine if the alternator is gone. I can go to Autozone once the battery is charged and have them test it or I can try out my new Schwaben/Foxwell scanner if I can figure out the instructions. Any insights on verifying alternator output?