alternator
 

hey guys so i was driving at 645 in the morning tuesday then my battery light came on, by the time i got to work which is about 30 minutes away from my house my radio died and my lights got dimmer, i left my car running for a sec when i got to work then wverything died on me 20 minutes later i came back out and my car started but the battery light was still on i drove like 10 mintes then it died again, that afternon i came back to my car and it started again last night there was no more power in the battery so it didnt work

i was told both alternator and battery by different people wat do u guys think????? im carless