{HEAD ~ A transistor} protects the integrated circuit against a surge voltage from {TAIL ~ a battery terminal} 
{ HEAD ~ A transistor } protects the integrated circuit against a surge voltage from { TAIL ~ a battery terminal }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL