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Over the past 20 years VRLA batteries have grown to become the staple of data center critical power backup systems around the world. Over the course of that time monitoring technologies have developed and become ever more sophisticated in order to allow users of critical VRLA systems some insight in to their state of health. While it is generally accepted that continuous monitoring of lead acid batteries is prudent, unfortunately the cost of such technology, to this day, remains at a point where it can be cost prohibitive. This paper explores an alternative technique of permanent battery monitoring which gives users all of the insight they need at a much-reduced cost.