Charge the battery separtly from the vehicle's charging system. This is a test of the new battery, the charging system and a possible drain..... if it starts again fine check the output voltage off should be 12.2 or a bit more if it's just been running and about 14 when running. Over 15V running is a problem.
Now turn on all lights, blowers radio or whatever and look at voltage with a raised idle -- it will drop some -- perhaps to 13.5V (these #'s just out of my hard drive

) and if a generator not an alternator it may need more RPMs for full output. Alts put out close to max amps at about 1,800 RPM and up. A low battery will limit an alternator's output but not the generator.
Ok, If that all checks out now check for a drain. Put a test light between battery neg and ground with cable off battery and it should be out with everything off that uses any electricity in the car but a clock wouldn't matter.
If it lights up get ready for the big hunt for the drain. Pull fuses one at a time till that test light goes out and note that circuit as that's the circuit with the drain and we go on from there when you can say what it covers if that happens,
T
I'm shere a lot so hit back and I should catch the post pretty fast,
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Tom Greenleaf - MetroWest, Boston