Gros Ventre
Well-known member
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- Bill
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I have seen advertised "Deep Cycle" AGM Batteries. But yeah... a typical starter battery can be taken into the deep discharge region, the issue is how many times. That issue of the active materials having different physical sizes depending on fully charged or fully discharged, means that the battery needs to be built to flex to that. A starting battery can have large capacity but at the end of the day isn't built to use more than maybe 5-10% of that. The ability of an AGM battery to sustain pounding & jostling is its strength. I infer that an AGM battery can be built either as a starter or a deep cycle.
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