What do VRLA, AGM, SLA and MF stand for?

“VRLA” stands for Valve Regulated Lead Acid, “AGM” stands for Absorbed Glass Mat, “SLA” stands for Sealed Lead Acid and “MF” stands for maintenance-free (Maintenance-Free). All four of these terms basically refer to the same type of lead-acid battery. An example is the pbq General Purpose series. These batteries all have a black color and are designed for standby applications.

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