Cells tester is designed to check the cells condition

When you buy new cells you must to check if they meet your needs or not.

The most important parameters are cells impedance (internal resistance) and cells capacity.

You don't need to check all the cells you bought. Check just several cells in the stock.

If they match the parameters stated in specification then most likely whole stock is OK.

First check the cells voltage. If you buy them from trusted manufacturer then all of them must have the same voltage.

Battery must support transmitting each cell voltage via SMBus. You can use PCB with BQ2060 or BQ2085 chips. Battery must have cells connected only in series. No parallel connections are allowed for measurement.

Fully charge the battery using external adjustable power source.

While charging limit the current with 1.5A and the voltage with number of cells in series * 4.2V.

For battery shown on the picture (4 cells) it's 16.80V (4.2V*4).

To check impedance and capacity connect the battery to adapter and apply external load.

Use load shown on the picture:

So you must:

1. Connect the battery to adapter.

2. Try to read it.

3. If you can read the battery then press "Cells Tester" button.

4. Connect load.

5. The process will start automatically.

If you want only to test cells impedance then disconnect the load after impedance measurement is finished.

In battery data window you'll see the log of measurement.

The columns are: time, VC1, VC2, VC3, VC4 and capacity.

Disconnect load when any of cells reach 3V, The measurement will stop automatically.

After measurement is complete you can save the data to text file.

For better result you can export the text file to spreadsheet software for example Excel to see the graphs.