The portable electronic device 1, wherein the battery includes a body, {HEAD ~ the body} is substantially rectangular in {TAIL ~ shape}, and the body has two opposite sidewalls and a surface extending between the two opposite sidewalls 
is substantially rectangular in
The portable electronic device 1 , wherein the battery includes a body , { HEAD ~ the body } is substantially rectangular in { TAIL ~ shape } , and the body has two opposite sidewalls and a surface extending between the two opposite sidewalls
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH