{HEAD ~ a battery} mounted in {TAIL ~ the case} and connected to the power input socket so the external battery charger can charge the battery 
{ HEAD ~ a battery } mounted in { TAIL ~ the case } and connected to the power input socket so the external battery charger can charge the battery
HEAD 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