when i go out to start up my car it doesnt crank or no lights come on! I jumped it and it took a while to jump it but it ran smoothly after that and didnt die! Then i took out the key and started it back up and the same thing happened! The battery i bought about 2 months ago but i know if the battery just sits in the car without being cranked it can die! Is there another solution to this problem or not? thanks a bunch!