Also connected to power bus 46 is rechargeable cell charge control circuitry 48 {TAIL ~ whose output} governs the operation of a step up DC DC converter 50 which receives {HEAD ~ the output} of one or more primary cells 52, such as alkaline batteries and raises the voltage thereof 
Also connected to power bus 46 is rechargeable cell charge control circuitry 48 { TAIL ~ whose output } governs the operation of a step up DC DC converter 50 which receives { HEAD ~ the output } of one or more primary cells 52 , such as alkaline batteries and raises the voltage thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH