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Compared with ordinary batteries, EFB batteries have made many improvements in details, while AGM batteries is more advanced. Plates for AGM battery are not soaked in the electrolyte (diluted sulfuric acid), the porous AGM separators adsorb most of the electrolyte.

AGM batteries (absorbable glass fiber mesh batteries) are mainly used in cars with start-stop systems. Compared with traditional lead-acid batteries, the technology of AGM batteries is more advanced, and it can better solve the pressure of frequent engine starts and the growing power load on vehicle batteries.

It's easy to miss the boat if you don't know how to use and maintain a start-stop system, which can even damage the engine, starter and battery.