Figs. 1,124 to 1,126.—Electric Storage Battery Co. chloride cells. The voltage of cells of all capacities is slightly above 2 volts on open circuit, and during discharge at the 8 hour rate it varies from that point at the beginning to 1.75 volts at the end.
Ques. What tests should be made while charging?
Ans. Occasional voltage and cadmium readings of each cell should be taken for the purpose of ascertaining their condition and the behavior of the separate plates.
Ques. What tests should be made after charging?
Ans. Each cell should be tested with a low reading voltmeter and hydrometer about once a week. If any cell read low, it should be cut out and examined to see if any material has been introduced which would cause a short circuit. If this trouble do not exist, the cell should be given an independent charge.
Charge Indications.—The state of the charge is not only indicated by the density of the electrolyte and the voltage of the cell, but also by the color of the plates, which is considered by many authorities as one of the best tests for ascertaining the condition of a battery.