1.Find the maximum current based upon the applications.
Check if the current required is below the Maximum rating of MAX17853/52 (ie 300 mA).
2. Select the Rbalance based on the formula Vmax_cell /2*(I_balance) as maximum battery voltage and balance current are known. (It is divided by two, because in balancing loop there are two resistors in series).
Example for battery with maximum voltage of 4.2 V and I_balance= 300mA,
R_balance= (4.2/(2*300e-3))=7 ohms