The nPM2100 PMIC does not have an internal battery protection mechanism. This means that if a battery is inserted in reverse polarity, the voltage of the battery is clamped to about 0.6 V due to the nPM2100 PMIC's internal Electrostatic Discharge (ESD) protection structure. This causes the battery and the nPM2100 PMIC to heat up. Long-term exposure to this condition can damage the nPM2100 PMIC, the battery, or both.