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.