The power source {HEAD ~ E1} consists of {TAIL ~ two groups} of cells connected in parallel with each other, each group consisting of five 1.5 volt cells in series 
The power source { HEAD ~ E1 } consists of { TAIL ~ two groups } of cells connected in parallel with each other , each group consisting of five 1.5 volt cells in series
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH