arduino mega 2560 + LiPower Shield

hello,

I am new to ardunino world and I want to connect a lipower shield (SparkFun LiPower Shield - DEV-10711 - SparkFun Electronics), I saw that when the mega 2560 will select automaticaly the power supply, so will it use the source from batt when is connected to usb ? will I see stats in console from the lipower shield when usb is connected ?

when I run the sketch i only get Hello World in console, so it looks like the sketch was uploaded

thanks

it is possible that i need to connect pin2 from lipower to SDA pin on arduino ?