MPF42790 Battery Pack Fuel Gauges Monolithic Power Systems (MPS) MPF42790 Battery Pack Fuel Gauges with level LEDs provide complete status information on lithium-ion battery strings up to 16 series cells. These battery pack fuel gauges determine the internal State-Of Charge (SOC) and State-Of-Health (SOH) for each cell and the full pack. The MPF42790 gauges estimate the remaining runtime, charge time, and instantaneous available power. These battery pack fuel gauges can achieve SOC accuracy within 3% when paired with the MP279x battery monitor. The MPF42790 gauges can also be paired with Analog Front-End (AFE) or battery stack monitors.