linkit one battery issue

I have a linkitone that I just got through instructables. I am currently testing out using the battery with my sketches. The board works just fine powered on USB. However when I switch the switch to Battery mode (and leave the usb plugged in) the board continual restarts. Is this an issue with my board, firmware, or something else entirely?

Sorry for the delayed reply.

Can you please check the battery voltage and let us know.

Thanks and Regards