Hello,
As I said in my last post 1 and 2 cells are in series to 3 and 4 are in parallel. # 3 + is soldered to #2 -, making 1 2 3 cells in series. What got my attention was that from 1+ to 4+ I got the same voltage as I did from 1 to 2. The + on #4 acting as a -?
Any how. I duplicated the circuit with old cells. DO NOT TRY TO DO THIS TEST!!! You will see why in a minute. I used a 1 Ohm 10 watts 1% power resistor. All the cells were about 4 volts each before the test. As the picture shows the amp draw was a little over 4 amps. I quickly checked voltages on each cell, as the current draw was going down quickly, down to 1.5 amps, at the end of the test, then I unhooked the load. 1 2 3 cells, all in series, had the same voltages, showing 3.12 volts. The surprise was #4 cell. With the negative and positive leads on the meter matching the cell's polarity the voltage quickly climbed to + 5. 4 volts! It did not get hot as I quickly removed the load. But #4 cell appears to being charged when in the circuit that way? Its a new one on me!
Guido.
As I said in my last post 1 and 2 cells are in series to 3 and 4 are in parallel. # 3 + is soldered to #2 -, making 1 2 3 cells in series. What got my attention was that from 1+ to 4+ I got the same voltage as I did from 1 to 2. The + on #4 acting as a -?
Any how. I duplicated the circuit with old cells. DO NOT TRY TO DO THIS TEST!!! You will see why in a minute. I used a 1 Ohm 10 watts 1% power resistor. All the cells were about 4 volts each before the test. As the picture shows the amp draw was a little over 4 amps. I quickly checked voltages on each cell, as the current draw was going down quickly, down to 1.5 amps, at the end of the test, then I unhooked the load. 1 2 3 cells, all in series, had the same voltages, showing 3.12 volts. The surprise was #4 cell. With the negative and positive leads on the meter matching the cell's polarity the voltage quickly climbed to + 5. 4 volts! It did not get hot as I quickly removed the load. But #4 cell appears to being charged when in the circuit that way? Its a new one on me!
Guido.