Do like Larry says. Also find someone with an inductive amp meter that can check the charging amps. With the engine running at about 1500 rpm and all other electrical devices (a/c, lights, etc) off, check the charging amps and watch it to make sure it drops as the battery charges. It should drop to 10 amps or so depending on the car. Remember, if cooling fans come on this number will go up as the alternator is supplying all power needed for the car and charge the battery. I know you have a new battery, but I have seen many battery's that will charge up but only to a "not quite charged" level and will continue taking the charge from the alternator. This puts an undue amount of stress on the alternator and usually over heats it to the failure point. Also, if possible, never jump off a car with a dead battery and then drive the car to recharge it. I KNOW, this is done all the time but it puts an undue stress on the alternator that is trying to charge a dead battery, run the A/C on high at night with the lights on and the radio on full blast with and the kids in the back seat running the windows up and down. Well I think you get the point. If you have to be jumped, and then drive, at least keep everything off that you can until the battery can be charged with a charger or the alternator can do its job of recharging with out the extra loads.
If any of this makes sense, I hope someone will learn something. If I confused you, let me know and I will try to explain what I meant.
Paul

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84 500 SEL (307,xxx miles)