![]() This entire argument depends on the ratio of batteries that are coming IN their doors to be tested. So BOTH would have to be suddenly mistaken. Both of these devices have been dead on with batteries for 10 vehicles I own including motorcycles, marine batteries and at least 4 car / van batteries. BOTH, independently evaluated the battery as bad.that doesn't mean it's not useable.just as a tire with steel belts is still "useable" to some. My other is a relatively new popular name brand charger sold at Walmart. I also have a load tester I'm going to try on it.Īnyone have any info they want to share on this?įirst.remember that I have TWo battery testers.one is a complex computer device that can tell if the battery is low on electrolyte, frozen, sulfated and so forth. My next test is to measure voltage during cranking and see how low it goes. I don't think both my battery chargers and maintainers are bad. Ok.that's just a theory.maybe even a bit paranoid theory? So, it might be down to 80% capacity, but they will say it's good. So, where a battery might be down a bit in capacity, their tester will show it as a good battery anyway as long as it meets certain acceptable load requirements. I think AutoZone and Auto Parts stores that sell batteries get a TON of batteries back from people and it is in their BEST INTEREST to show that as many of them are good as possible to prevent mass warranty exchanges. I haven't yet.but this is what I THINK is going on.you give me your take on it. So, since I always found my two battery maintainers at home to be reliable, I had some doubts as to what was going on. So, I then took the battery to Auto Zone.again, their battery tester said the battery was good. I have the receipt, just have to dig it up)Īnyway.their "$5000" tester said the battery was Good. So, I took the battery to my local Advance Auto Parts where I had purchased it less than 1 year ago.guess what.they could find no record of my purchasing it. Eventually, it ALSO reported the battery as bad. So, I disconnected that charger and connected a special charger I have that has a computer in it and runs a series of tests on the battery. After about an hour it came back with "BAD" on the display meaning it detected something it didn't like. So, the battery was a bit low after that week so I connected my baattery charger to it. I have a paging alarm system on it in addition to the factory alarm. Recently I didn't use my van for over a week.
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