Testing the SEPIC Converter and LED Feedback of the adjustable rails.  The pot is calibrated by an additional bot on the bottom for accurate voltage readings.  When the LED begins to flicker it is almost at the desired voltage.  When it just becomes solid it is at the desired voltage.

When USB Power is applied the battery is disconnected and will be charged if needed.  When Usb is disconnected the battery will be enabled allowing continuous operation.