I was driving and my battery light came on and then when I turned the car off it wouldn't start so once I charged the battery I got it going again but the same thing happened so I bought and replaced the alternator and surpentine belt and even bought a new battery everything was fine once replaced but then the other day I was driving it around and had been all day out the blue the battery light came back on and I turned it off and it wouldn't start back so I got a boost and was able to get it home but it is blowing my mind as to why this keeps happening...please help me with this?? Thank you!!