my car battery died yesterday night.., what happend? Options

[yellowxboy]

yesterday night i was out with my gf .. after dinner we went back to her place to take a nap and when we decided to go out for some coffee, my car wouldn't start. all the lights were very dim, my guages didn't light up, it made a faint clicking noise when i tried turning the key but the motor didnt even move.

at first i assumed the battery died, but i just bought the battery not too long ago (5 months i think). my friends came over to jump start my car and everything is back to normal. my gf's dad thinks that the alternator is old and that i need to buy a new one because it is draining my battery..

any suggestions? i want to get a general idea before i bring it to a machanic to get it fixed.

[ i didnt leave anything on while my car was parked, i have 2 subs that are powered by a 900 watt amp, i rarely turn on my glow lights. but i do drive with my lights on in the morning.. could that be a reason why it drains? ]

[yellowxboy]

wait, so your mechanic said that you kept shorting out your car battery? is there any way to fix that? my dad and i are going to change the alternator tomorrow afternoon and maybe get a new battery.

[nitemare]

wait, so your mechanic said that you kept shorting out your car battery? is there any way to fix that? my dad and i are going to change the alternator tomorrow afternoon and maybe get a new battery.
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Yes, I had a bad terminal. When the car moved, the terminal would move slightly and cut all power from the car. He had to run a power test on the amps, subs- they all passed(even though he said they were sucking alot of juice). then he found a lead that was sucking juice as well (the terminal). he only charged $30 for the testing. past 3 months no more power probs..