Firus

Hi, I think I have a problem with the battery but i want to make sure this is not something else. The other night I couldnt start my car. It looked like the battery went dead. So I jump stared it from a friends car but when I started to drive after few minutes, the car died. I could start it again. Same thing. I did it twice, not moving the car for around 15 minutes but again it died on me. Now I am charging the battery with a charger but I am afraid it might be somethong else. Please help.