Unfortunately, MAX17260 cannot be used to measure the capacity of NiMH batteries. Our ModelGauge algorithms were specifically designed for Li-Ion batteries. The charge/discharge characteristics of NiHM batteries are actually much different than Li-Ion batteries, so our ModelGauge algorithms will not work with NiMH batteries.
We do have some older fuel gauges that can be used with NiMH. We recommend the DS2786 or the DS2438 to measure 3 series NiMH battery.