A low battery indicator 54 is preferably provided to indicate {HEAD ~ the charged state} of {TAIL ~ the primary cells} 52 
of
A low battery indicator 54 is preferably provided to indicate { HEAD ~ the charged state } of { TAIL ~ the primary cells } 52
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH