Power port issue

I recently bought my gopigo and raspberry pi 3b. when i power up my raspberry pi from usb cable it turns on fine and my gopigo indicates a red light. But when i try to plug it from the power port it does not receive any power nor does the raspberry pi.
note: cable is from an old nokia phone , batteries 6v cannot buy a cord not in the usa

@fahd.hatoum5, 6v is not enough oomph. The assembly instructions for your kit explain to put eight AA cells in the battery holder and use the supplied cable.