Battery was Tattu 4S, 4200mAh, 30C. Setup was per Erle instructions. Battery > Power Module > PDB + PXFmini. I found a cold solder weld on the PDB which resulted in the shorted circuit. I think the battery is now bad, not sure about the power module or how to test it without ruining another battery.
I am unclear how to connect the zero to by wifi. Unlike my other Raspberry Pi, all my ports are connected (see image), no place to connect my wifi dongle. The dongle in the image is for my wireless keyboard.