Why do Discover™ VRLA batteries have excellent shelf life as compared to others?

Higher quality Superior grids, premium separators and pure electrolyte make the difference. Impurities in the lead alloy, separators and electrolyte cause tiny currents inside a cell which eventually discharge the battery and shorten its shelf life. Premium inter-cell welds block the minute cell-to-cell currents that cause self-discharge. Some VRLA batteries are sold, or are misinterpreted by the purchaser to have Deep Cycle ability when in fact they are just general purpose VRLA batteries.