Abstract: An improved system for electrochemical impregnation of active material into an electrode for a galvanic cell comprises utilizing a constant potential during the impregnation as well as a screen or barrier interposed, in the bath, around the electrode while it is impregnated to mitigate the deposition of active material on the outside of the electrode surfaces. A more densely packed electrode having a higher charge rating per unit volume results. In a preferred embodiment the active material comprises a minor amount of a second ion and the ratio of the two ions in the bath is maintained by use of a consumable electrode in the bath having the desired ratio of ions therein.