Texas Instruments has introduced a system-side fuel gauge IC with impedance track technology which is claimed to be able to predict battery life with 99 per cent accuracy.

The bq27500 system-side battery fuel gauge operates by measuring data from a device’s single-cell Li-ion battery to predict remaining battery capacity under all conditions, even as a battery ages.

The IC analyses precise state-of-charge by correlating between a battery’s voltage and cell impedance, or resistance, and its current integration to adjust remaining state-of-charge up or down the predicted discharge curve.

The bq27500 directly measures the effect of a battery’s discharge rate, temperature, age and other factors to accurately predict remaining life within one per cent error, said the supplier.

It is available in a 12-pin, 2.5x4mm package.