The operational lifetime of a lead-acid battery bank is determined by several factors, including the type of battery, the operating temperature, the charging and discharging cycles, and the maintenance practices. The end of the battery's operational life is typically defined as the point where the battery can no longer deliver its rated capacity or maintain its voltage within acceptable limits. Capacity testing is a key method for determining battery health. This involves discharging the battery at a specified rate and measuring the time it takes for the voltage to drop to a predetermined level. A significant decrease in discharge time indicates a loss of capacity. Internal resistance testing measures the internal resistance of the battery. An increase in internal resistance ind....
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