Car Batteries Prices Autozone

What is a good alternator I can buy at Autozone for a 2003 Ford Explorer V8?

I had my alternator tested and it worked to 12.5V when he said the standard is 13.5 to 14.5 volts. I'm buying one in a few days before it drains the Battery I have just put in. is alternator quality at a good price for a 4.6 liter engine. If it matters, I have a Sirius satellite radio installed, and often use the power when the engine is off while sitting in my car for 10-15 minutes at a time. And what is the voltage I should have? The way it was tested …. Autozone highlighted this huge thing tester on wheels. First he fixed the battery, came good. Then he asked me towers to 2,000 rpm and when he showed me the alternator operating at 12.5 volts, and I did not have all the accessories time. I also wanted my comment does not appear to satellite radio too much power and I have not any high-end speakers or sound system there. So what is the voltage on a brand new alternator to be able to sit with the radio without the engine running?

go with duralast.they products.and have good position behind it warranty