New Car Battery died after 1 day?

What happened is those few jump starts without charging the battery are what caused the alternator diode to burn out and create the short to ground that discharged your new battery.

You need to take the alternator off and bring it to a parts store for a bench test which checks the diodes.

On computer driven cars it is not good to jump start them and then just drive them without getting the battery on a battery charge. This is what happens.

My neighbor had a similar challenge and the 'experts" at Firestone provide her a $500 music-up. did no longer do something for the challenge she had complained approximately. on a similar time as she became out of state for a week in California she left her automobile interior the storage and that i appeared after her homestead. whilst she got here homestead, her automobile would not initiate. She had reported that if she did no longer force it each 2 days the battery might run down and the motor vehicle would not initiate. The storage became cool and the 1st element I appeared at became her cellular-telephone means furnish plugged into the cigarette lighter. It became heat on a similar time as something ot the motor vehicle became cool. there became a sticky label on the area of the cellular-telephone means furnish that reported, "do no longer pass away plugged in whilst no longer in use." bounce started her automobile and advised her to pass away this tiny means furnish unplugged whilst she wasn't applying it. challenge solved. That became all she had to do all alongside. different challenge I stated became whilst she had her battery replaced (her first attempt to therapy the challenge) the installer did no longer placed the battery carry down (Clamp like thingy) back the place it belonged so her battery became sliding around on appropriate of the battery tray. this could reason a short if the battery terminals touch something under the hood. those events are normally called a "parasitic draw". a save that makes a speciality of electric paintings can diagnose and restore those issues very effectively. could desire to take under an hour to diagnose and repir maximum parasitic attracts. good success!

An alternator will make a whining noise when a diode goes bad in the diode pack. The battery can discharge through it.

From what you say, it sounds like it may be the alternator. It could just be dying slowly. Get that checked out and that should open some curtains for ya. Good luck!

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Are the cables connecting to the battery okay? I had some ratty ones on mine that weren't making a proper connection, once I replaced those it was fine.

I'm guessing it's the alternator.