Then, the battery 30 is reversely placed in {HEAD ~ a “tool” mode position} in {TAIL ~ the cavity} 17 of the main body 10 
in
Then , the battery 30 is reversely placed in { HEAD ~ a “ tool ” mode position } in { TAIL ~ the cavity } 17 of the main body 10
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH