Jason, The voltage on the sensing resistor is less than 10 mV. It can be estimated that the accuracy of the charging current of your case is about 10%-15% based on the 20mV and 4mV accuracy shown on datasheet Page 7. If you want to increase the accuracy of the charging current, increasing the sensing resistor value is the option. bq25610 is a charger controller with MOSFET driver. The power dissipation from the driver generates heats. Please refer to Page 29 of the datasheet. Enough PCB copper-pour area on different layers is needed to ensure the thermal dissipation. Regards, Eric
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