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Intermittent Vrla Charging: A Mostly Bad History, But Is There A Better Way?

Curtis Ashton

Intermittent charging of VRLAs has been around for a long time, and sometimes there is no choice (the application can only charge intermittently: think for example, of vehicle engine-starting VRLAs, and standalone photovoltaic applications). Intermittent charging by choice has also been tried many times as a potential way to lengthen battery life. In most cases, this has failed miserably in its goal. This paper will examine the theory behind why intermittent charging should work in lengthening life if done properly, as well as show examples of how it has been done improperly, and why it didn’t work.

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