A portable electronic device includes {HEAD ~ a main body} , {TAIL ~ a cover} , and a battery  
A portable electronic device includes { HEAD ~ a main body } , { TAIL ~ a cover } , and a battery
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH