BATTERIES | ||||||||
These pages are mainly about customer apparatus, so the larger type of
batteries are generally omitted.
A cell is a single power source of generally 1.5 volts, whilst a battery is a group of cells. Wall telephones with internal provision to hold batteries and table telephones where the batteries were in a cupboard or other safe environment were fitted with wet cells. Where there was a danger of the battery box toppling over, dry cells would be fitted. Batteries are a group of cells and a high energy source. Because of this they are always secured, either in the telephone or in a box, called "Boxes, Battery". Click here for Boxes, Battery. Primary batteries are designed for single-use and deliver energy until depletion, while secondary batteries supply energy, by supporting multiple cycles through recharging. Cells, Bichromate, Daniell, Agglomerate and Zincs Circular were superseded by Cells, Leclanché and Zincs, Rod, Leclanché. GPO education pamphlet on primary and secondary cells GPO publication on primary batteries - Type and maintenance
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Last revised: October 03, 2026FM | ||||||||
