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