Driving the car to work one morning an the battery light came on while driving it then started to slow down and seem to get weaker the further I drove. Stopped the car to check it out and I smelt rubber burning, checked the belt and it looked fine. Tried to start it back up and then nothing. I am assuming its the alternator at this point , I just need to know what I need to get 70, 80 or 100Amp? most of the information on the alternator is rubbed off. I just don't want to put the wrong one on it and mess it up.