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Range: up to 1 micro-meter
Test Set-Up:
Pass high (known) current and measure voltage drop - have known shunt resistors so we can use that to ensure current measurement is accurate
For measuring resistance in-between pack: measure resistance of pack, and subtract the resistance of the cells - source a measure unit from school labs
To-dos: create a set-up for measuring very-accurate low-voltage readings
Battery Impedance Meter - more detailed behavior, AC (not needed)