Can the battery add distilled water?
Valve-regulated sealed maintenance-free lead-acid battery is different with other batteries. In fact, though less evaporation of the electrolyte and no leakage, the battery still needs a little bit maintenance work. Because the charging equipment do not reach the ideal level yet, it is inevitable that there are small amount of evaporation of distilled water. For those who know a little about the battery knowledge, if find the capacity decreased above, they could add some water in moderation to recover the concentration of electrolyte. A little bit lower concentration is also okay. Those activities are good for the plates.