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Part 2 of the standard 62877 applies to water for use with vented lead-acid cells and batteries; that is, water for preparation of electrolyte and for topping up cells or batteries. The purity of refilling water has to meet higher requirements compared to filling electrolyte. The responsible committee is DKE/K 371 "Akkumulatoren" ("Accumulators") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.