The MAX1873 comes in three different versions to support charging for 2 (MAX1873REEE), 3 (MAX1873SEEE), or 4 (MAX1873TEEE) Li+ cell charging. The equations on page 12 of the MAX1873 datasheet for the inductor value, input and output capacitor values and output capacitor ESR should be used to check component values. All other component values should remain the same.