A portable emergency vehicle battery charger has a portable case, {TAIL ~ a battery} and {HEAD ~ a circuit board} 
A portable emergency vehicle battery charger has a portable case , { TAIL ~ a battery } and { HEAD ~ a circuit board }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD