{HEAD ~ Each battery management unit} monitors {TAIL ~ a plurality} of batteries and can selectively charge a selected battery via a charger and switch circuit or can selectively discharge a selected battery via a load and switch circuit under the control of a controller 
monitors
{ HEAD ~ Each battery management unit } monitors { TAIL ~ a plurality } of batteries and can selectively charge a selected battery via a charger and switch circuit or can selectively discharge a selected battery via a load and switch circuit under the control of a controller
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH