My car starts then dies out on 1991 Mazda Protege

I just came home from college and found out that my car 1991 mazda protege has a problem. For it to be started it needs to be jumped and after it starts it runs good but it but dies after about 15-20 minutes. Can anyone help and let me know what the problem is and how i can fix it?

Asked by for the 1991 Mazda Protege
1 answer
The battery could just be that stone dead that it will not allow the car to continue running. Start there with charging or replacing your battery. When you have a known good battery, checking the charging system is in order.