The nPM1300 Power Management Integrated Circuit (PMIC) monitors battery temperature using Negative Temperature Coefficient (NTC) thermistors, available on different connectors on the Evaluation Kit (EK).
When using a battery pack with an integrated NTC thermistor, use battery connector J2. Leave NTC pin on P3 unconnected.
When using a battery pack without an integrated NTC thermistor on J1 or header P1, use the integrated 10 kΩ resistor on the EK or a custom resistor. See NTC jumper for more information.
If there is no NTC thermistor in the battery pack and a resistor is not connected between NTC and GND on P3, charging will not occur, and the charging LED (CHG) does not light up.