8/2/2023 0 Comments Agm batteries wikiThe AGM is a suspended electrolyte battery that ties up the battery acid in a fine fiberglass mesh and keeps it from spilling in your trunk. That is why Mazda chose an Absorption Glass Mat (AGM) battery to be placed in the Miata. This helped the handling of the car, as we all know, but it was not a place for a corrosive and possibly explosive item like a car battery. The original design of the Miata placed the battery in the trunk for good weight distribution. made batteries to Japan!Īnother strike against the new replacement battery from Mazda is one of commitment. still carries a Panasonic battery in the trunk. That is why every Miata that enters the U.S. and is not subject to long ocean voyage transportation costs. The new replacement is manufactured in the U.S. with batteries, they need to ship pallets of very heavy, thereby costly, batteries over the ocean. In order to supply Mazda parts departments in the U.S. Well, I cannot dispute that, but I believe that economics played a larger role. Mazda claims this change in batteries was due to customer complaints about the original battery. The price is only around $80, but you will NEVER see 72 months of service from this battery. When you go to a Mazda parts department you now get a standard wet cell (albeit sealed) battery. ![]() In mid 1998, Mazda quit selling the Panasonic battery as a replacement for the Miata. ![]() Still, people complained when they had to shell out $130 for a replacement from Mazda. The Panasonic has a demonstrated average life of 6 years (72 months) and there are continuing reports of original Miata batteries still going strong beyond the 10th year of service. If you take good care of it, and live in a temperate climate, 48 months might be expected. Usually a car battery will last, on average, 36 months. In addition, mechanics who tried to "quick charge" it found out they quickly ruined it.Īt the same time, Miata owners were finding out this is one great little battery. This battery caused confusion early in the sales of the Miata, since it did not require service like a standard car battery. The OEM (original equipment) battery is a product of Panasonic. Since that article was written, changes have occurred in the area of batteries for the Miata. This article is available on the SDMC Web site and on in their respective Garage sections. I wrote an article for the SAN DIEGO MIATA CLUB NEWS in 1997 that detailed the stock Miata battery and an alternative aftermarket replacement (SDMC News, Volume 2, Number 6). since 1989 has been factory equipped with a special battery. The Miata Battery - More Choices Than Ever BeforeĮvery Miata manufactured and sent to the U.S. AGM batteries are better suited to meeting the demands of higher specification vehicles that include one or more of the following technologies: Start Stop, Regenerative Braking and Passive Boost.Battery Update Submitted by Anthony Wilde These include glass mat separators, recombinant lid technology and higher pack pressures to facilitate improved cyclic lifespan. AGM batteries benefit from the inclusion of unique design features not found in wet-flooded batteries. EFB technology relies on improvements to existing flooded technology through the addition of Carbon additives in the plate manufacturing process. WHAT ARE THE DIFFERENCES BETWEEN EFB AND AGM BATTERIES?ĮFB batteries have been introduced as a lower tier option to AGM batteries in terms of performance and durability. ![]() As an approximation, EFB batteries will provide 85,000 engine starts, compared to 30,000 starts from standard flooded product. The primary benefits of EFB technology are improved charge acceptance and greater cyclic durability when operating in a reduced state of charge (typical of Stop Start applications). WHAT ARE THE DIFFERENCES BETWEEN STANDARD FLOODED AND EFB BATTERIES?ĮFB batteries are an enhanced version of standard wet-flooded technology. A comprehensive EFB drop down part number look up table, ensures you accurately test and diagnose batteries using specific test algorithms. Only Midtronics have a true EFB testing platform, found in the MDX655P Start/Stop Tester. Some EFB batteries can be tested using standard flooded test algorithms, however there many that will test inaccurately and subsequently deliver misdiagnosis through over-reading the batteries measured cca value. The primary benefits of EFB technology are improved charge acceptance and greater cyclic durability when operating in a reduced state of charge.ĬAN I TEST EFB BATTERIES WITH MY BATTERY TESTER? These type of batteries should not be confused with standard flooded or AGM batteries. EFB batteries are an enhanced version of standard wet-flooded technology.
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