This morning while driving to work, I was about 5 mins away, the radio went off, I tried to turn it back on and the message "low battery" came up across the radio. I then noticed that all the controls were dead, speedometer didn't work, gas showed as being empty etc. The car was still running though.

I got to work, parked, turned off the engine, tried to turn it back on but it wouldn't go on. I asked one of the guys here to take a look, we go back downstairs (this was about an hour later) car turns on fine, everything was working again. He drove it around the parking lot a couple of times, still working fine, the battery light went on though at this point. We parked, turned off the engine, turned it back on, everything still fine.

Anyone have any idea what that could be? The battery, the alternator? HELP, I hate car trouble