A gas gauge circuit has {TAIL ~ a power supply pin}, a power return pin, power on {HEAD ~ reset capability}, and a communications signal pin 
A gas gauge circuit has { TAIL ~ a power supply pin } , a power return pin , power on { HEAD ~ reset capability } , and a communications signal pin
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH