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