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If you know for sure the battery, alternator, and serpentine are OK. then (A) you might need more power to start than your battery can produce. This is not likely because the jump battery does the job. (B) are not really charging because of a bad connection at ground, battery cable, or fuse. You can test this with a volt meter. You might try checking the battery condition just after running by turning on the headlights and see what they do when you try to start. You can check it again a few hours later. (C) Something in the car is draining power. You can check this by (1) disconnecting the ground cable at the battery, (2) charging the battery, (3) connect a test lamp between the the battery cable and the battery. If the test lamp glows, some device is pulling power with the ignition off. Pull fuses one at a time until the test light goes out. (replace the fuses if the light stays on.) Then find the component on the fuse that is grounded and fix it. Look for simple stuff like a wire with bad insultion at one spot or maybe a bad cigar lighter.
it could be any thing , start with fuel , make sure there is fuel in the car , then if you have a jumper cable , conected to other car and see if it start , if not then go and check the fuese like fuel pump relay , starter relay ..etc ...dose your car crank when you started or it totally dead like no sound ??
it sounds like you have blown fuse to the Alternator.. I don't know what car you are talking about but they charging systems vary.. But if alternator isn't getting all the power it needs it won't charge. this should be checked.
My RX8 had the same problem. First, change your battery cable ends. On the Positive cable there is a white wire that powers the power steering. It probably has a bad connection at the battery post. I cut the end off my rx8 and just put a regular battery cable end on it and my problem was solved.
check the engine and look at the battery and if the battery doesnt work go to auto zone or just check if there is something stuck in the engine or somewhere around there that happened to me and it worked lol ~^_^~