An Astron power supply as the main power source and connected it to a 1 ohm 100W resistor for one test and 2 1 ohm resistors in parallel for a .5 ohm test. Voltage reading was taken at the mod.
One problem I ran into was the regulator would not output over 6 amps at 3.7 volts into a .5 ohm load. It needed to be at a higher voltage, so I used 7 volts to output 13 amps of current through the mod. This is will come out to a load of about .3 ohms at 3.7 volts.
The testing is to isolate the mod itself and to get actual voltage drop and current flow and not be influenced by atomizer and battery resistance.
Note that firing the device with varied pressure, pushing the button to the side when firing, etc., causes voltage variations. Some a lot worse than others. The mod is fired multiple times and the most consistent voltage is recorded.
VOLTAGE DIFFERENCE BETWEEN PLATED AND PLAIN CONTACT PINS
Control device used was a Brass Nemesis because of its consistent voltage readings. Everything was used in the same manner with the exception of the different top and bottom contact. The brass contact originated from a plated clone contact with the silver plating stripped off.
The Nemesis silver plated contact was used as the control voltage as that had the lowest voltage drop.
Low current test:
Silver Plated brass (control) - 0 volts
Clone silver plated brass +0.004
High Current Test:
Silver Plated Brass (control) 0 volts
Copper -0.001 (better than silver plated brass, but .001 could be human error
Clone Plated contacts +0.003
I am now using a new method of testing batteries. The load is still a fixed .5 and 1 ohm power resistor, but the voltage is logged over a set time period.
Also the internal resistance of the battery is tested.
Again, these tests are subjective. Battery age, condition, batch lots, etc., can all vary in test results, plus multiple batteries of the same make and model are not tested to check for consistency. If a test value appears to be erroneous, it is retested or another battery is used.