Use the slide switch SW5 which is labeled VBAT SEL to select the power supply for the nPM2100 Power Management Integrated Circuit (PMIC).
Sliding SW5 towards VBAT connects the battery source from the battery side (VBAT) to VBATIN on the PMIC side. Sliding SW5 towards VEXT allows the onboard USB-powered LDO to power the PMIC.
For more information on alternative power sources, see Use the nPM2100 EK with an alternative power source.
The following figure shows the VBAT slide switch schematic.
Figure 1. VBAT slide switch
