You have to use a custom battery model if you want to use the MAX17043/MAX17044, or the measurement error will be very large. To generate the custom battery model, we have to charge and discharge the battery under different discharge current and temperature many times. It usually takes about two weeks to generate the custom model. Maxim only provides the custom model when the volume is higher than 10k per year.
The MAX17201/MAX17205 or MAX17055 parts don't need a custom model. These parts have EZ mode which provides good performance for most Li+ rechargeable cell types.