I spoke with this very polite young man. Do ii need a new battery or alternator? Did you happen to see, or did they say? The only reason I was there yesterday was because I needed to exchange the compression tester they'd given me as it was broken! My OEM alternator seemed burned out. I'm not car-savy, unfortunately. The AutoZone test will accurately test the output of your alternator on that day. The tool said nothing about how much CCA it was outputing, only its volt output, charge level, and it needed replacing. Anyway while I was there I decided to test the battery. Both are good indicators that most 'zone' type garages probably wouldnt do. Did they do a load test, or an open circuit voltage test? What does that mean? When she ran the test she stated everything us normal bur read battery voltage is too low! How accurate is the AutoZone alternator test? Also - I do … My car has 17800 miles. My trust in autozone is a little low. I’ve only used AutoZone’s free testing once, but it was accurate. Is the … This is currently around $40, so definitely worth having. I took the adapter and the battery in together and it took an hour, having Joe the automotive guy test the battery and say it had a bad cell but "the adapter could not possibly drain the battery", and three successive assistant managers to convince the third one that the adapter was the fault and that the battery … The tester requires the battery’s CCA (Cold Cranking Amp) rating, the ambient temperature, and several other variables. Yes, AutoZone offers a refund of what is called your “core deposit” if you bring the old item in for replacement. I attempted this twice and said heck with it and called autozone located on 2842 S BUCKNER BLVD, DALLAS, TX 75227 (214) 275-5922. Auto parts retailers like AutoZone will test a battery that allows the clerk to enter much more specific information to get a more accurate reading. I'm just wondering what the guys at autozone did for the battery test. After I load test it, I turn on the brights and see if the battery can hold its voltage steady for about 10-15 min. Went got a test from autozone for my alternator! So i work at AutoZone and one day i happened to test my battery. This is because if I don't turn on the car for 2 weeks, the battery will be dead. Before heading to the repair shop, I stopped by AutoZone on my way home. IMHO there is nothing more accurate than actually loading a battery with a real load, like 300 Amps. 6.0L Power Stroke Diesel - Autozone battery testing accuracy - I've been suspecting that my batteries were getting weak, so I stopped at Autozone to have them tested. I took the battery to my local AutoZone to have it load tested, the tool reported the battery was bad and needed replacing, was outputting 12.63 volts at 100% charge. Both batteries checked out good, as did the charging system. My car's transmission is unknown to me. And the tester said it's 100% charged but it indictated that it's a bad battery for some reason, and i was told by my co-workers that when it say its a bad battery, u need to replace it. You cant test the specific gravity of the closed battery, and thats a … Testing for reserve capacity is also important. I think you can find them on ebay for about $60. The tester then runs a similar load test to measure the battery’s … He checked both batteries separately and then the charging system.