Held in the radio button and tried to get the menu up and now the car wont do anything,says cal error on radio...what the hell....

 

battery just died for some reason,what would do that? car was just running for 20 min..

 

if the car was running for 20 mins and nothing happened when you tried to start it again i would suspect the alternator, it should of charged the battery within that time

 

How old is the battery?

 

Was charging over 14 volts...

 

If the alternator is showing an output of 14 volts at the battery then it is ok. I would suspect a loose/dirty connection at the battery itself, or the ground cable where it bolts to the stud on the transaxle. If they are all clean and tight then I would check the battery for a bad cell. Something else to consider is you cannot charge a battery to full capacity from the alternator. It needs to be put on a battery charger. The alternator will put a 'surface charge' on the battery, but that does not indicate the true voltage or amperage of the battery. The vehicle will start a few times with the surface charge, but after sitting for a while it won't start.