What constitutes a deep discharge for an SLA battery?



A deep discharge for an SLA battery occurs when the battery depletes a significant percentage of its total capacity.


Multiple deep discharges can have an adverse affect on battery life, and can eventually prevent your battery from accepting a charge at all. The good news is that SLA batteries tend to recover well from deep discharges, due to their calcium alloy grids. Still, many manufacturers recommend float-charging the battery to prevent it from reaching a deep discharge depth.


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