Here is a list of examples on how to wire components, power supplies, connectors, sensors, etc to the WiFiG25 to create your own Linux embedded board. Click on the image of the device you want to add.
The WiFiG25 needs a single line 5 volt DC power supply which can be provided in any combination on the following pins, only choose one method to power in the board:
RTC backup battery
Applying 3 Volt DC on Pin38 (GND) and Pin39 (VBAT +3VDC) of the J35 connector it is possible to mantaint the RTC (Real Time Clock) active when the power supply if off. This will mantain the system clock up to 6 months with no power using a small CR1220 Lithium battery.
A bigger battery can be used to extend the time duration.