To calibrate  new  or refilled  BQ20Zxx chips (Step1) you must to follow instructions below. If you don't replace or refill the chip just enter the values needed in Step2 window and press Calibrate button.

Don't forget to start  Impedance Tracking  after calibration .

To calibrate  new  or refilled  BQ20Zxx chips  you must to have constant power source and constant electronics load. We recommend to use load based on LM317:

Generally the process flow is the follow:

Now the chip is ready for usage. Remove resistors, connect cells and start Impedance Track algorithm.
Perform calibration cycles. It's very important coz battery will learn its capacity and update impedance table at this step.

For better accuracy Chemistry ID of your cells must match the Chemistry ID of Data Flash.