Developing. The first cycle or cycles of a new or rebuilt battery to bring about proper electrochemical conditions to give rated capacity.
Diffusion. Pertaining to movement of acid within the pores of plates. (See Equalization.)
Discharge. The flow of current from a battery through a circuit, opposite of "charge."
Dry. Term frequently applied to cell containing insufficient electrolyte. Also applied to certain conditions of shipment of batteries.
Electrolyte. The conducting fluid of electro-chemical devices; for lead-acid storage batteries it consists of about two parts of water to one of chemically pure sulphuric acid, by weight.
Element. Positive group, negative group and separators.
Equalization. The result of circulation and diffusion within the cell which accompanies charge and discharge. Difference in capacity at various rates is caused by the time required for this feature.
Equalizing. Term used to describe the making uniform of varying specific gravities in different cells of the same battery, by adding or removing water or electrolyte.
Evaporation. Loss of water from electrolyte from heat or charging.
Filling Plug. The plug which fits in and closes the orifice of the filling tube in the cell cover.