Why wont my car start ?

[804zxkid]

So this morning i went to go start my car up and it wouldnt start. I got a jump start from my brothers car. It charged after a few minutes so i took it to school.
After school i went to go start it and it would start !! so i had my brother come up and give me another jump. we had the cables on for about 15 minutes and the security light came on and all the other lights did also. as soon as the cables were disconected all the power shut off.
I took the battery to go get checked and the guy said it was good. we put it back in the car and tried to charge one more time and it started up. I got it home and turned it off. I tried turning it back on but nothing happened. The fan spins for a short second and it makes a click but wont start. any ideas ??

[demonZ73]

what did the guy test the battery for voltage or cranking amps?? just because the voltage is good doesant always mean the battery will start ur car it needs to have the proper cranking amps, i think or ur alternator it doesant sound like its charging ur battery correctly or at all...........good luck hope this helps

[804zxkid]

Im not sure what he checked for exactly, he just hooked the battery up to the little machine. well, Good news ! I looked at it again this afternoon and turns out that the terminals are just so old they complety cracked and came loose. I took two pennies and placed it in between and now it doesn't wiggle a bit. They fit great now. Its not the cleanest look but it should be good for now as I do plan on replacing them soon. This is my first car and im only 16 so im still learning about these little things. Thanks for the response !