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:

Position	Pin Define	Remarks
J35	Pin36 ----> +5V Power In  Pin38  ----> GND
J37	Pin1 ----> +5V Power In  Pin4  ----> GND
Micro USB	Pin1 ----> +5V Power In  Pin5  ----> GND

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.