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Sounds as if you have a short draining the battery overnight. Take the battery negative off and run a 12volt test light between the terminal and the ground post on the battery. leave the key out of the ignition switch. see if there is a dim or bright light glowing in the test light. If either one is the case start pulling out your fuses and watching the light until the light goes out. When it goes out y have identified the circuit your short is in. ( headlamps, door switches, ect. ) Make sure to put each fuse back in the proper place so as not to burn anything up!!!!. By the way , you did NOT keep the positive battery terminal off to see if the alternator was charging did you? If you did you just burned up your new alternator,which by the way will give your battery a direct short to ground through the diode trio in the alternator, thus causing the battery to very quickly drain. and Why should you have to jump start a NEW battery? Check to see if you are lucky enough to have a charging fuse, if you did the positive off while running thing that fuse could save you if you have it.
Hi, I think you have a bad altinator or eletrical short which drains your battery over night, once you jump start your vehicle the altinator charges your battery enough that it starts all day but if it is parked for longer time the battery drains.