The extending portion extends along {HEAD ~ the length} of the battery and the enlarged portion fits over {TAIL ~ the top} of the battery 
The extending portion extends along { HEAD ~ the length } of the battery and the enlarged portion fits over { TAIL ~ the top } of the battery
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH