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Field Experience, Capacity Testing of GNB Absolyte Batteries, Pre and Post Rehydration

Peter J. DeMar

While it is understood that there are two basic valve-regulated lead acid (VRLA) designs, which are absorbed glass mat, often referred to as AGM, and gelled electrolyte which is referred to as gelled, this paper will concern itself with the AGM design cells, as that is the type that has the largest installed base in the larger (over 200AH) cells. The batteries in this study are all manufactured by GNB, at least 6 years old when the study was started, and are of the 75 amps per positive series (75A21, 75A23, and 75A25).

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