TWO VOLT CELL BATTERY TESTER, 1943

Military tool used for testing the charge on Vehicle batteries, the prongs would only fit on older batteries having the cells connected together on the surface of the unit, unlike today when the connections are buried in the top of the battery. Twelve volt vehicle batteries are made up of six two volt Cells connected in series to produce twelve Volts. By placing this unit across a cell it puts a load of 20 amps on the cell, the meter should read two volts for many seconds if the battery is in good condition and fully charged. The meter is centre zero measuring two volts negative or positive so there is no need to put the terminals the right way round. Also the meter is marked to 200 amps but is fitted with a shunt resistance of point 9 ohms, as it looks like the shunt can be changed for different loads.

A1713