Battery analyzer is designed to check  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 a stock. If they match the parameters stated in specification then most likely whole stock is OK.  First check the cells voltage. If they made by trusted manufacturer then all of them must have exactly the same voltage. 

How to use:

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. To check impedance and capacity use external load 

5. If you use electronic switch then analyzer will start . If you don't use it then you'll be prompted to connect load.