The system 1, wherein the transmitter is inoperable to transmit data when {HEAD ~ the actual voltage supply level} of {TAIL ~ the batter} is lower than the second voltage threshold 
of
The system 1 , wherein the transmitter is inoperable to transmit data when { HEAD ~ the actual voltage supply level } of { TAIL ~ the batter } is lower than the second voltage threshold
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH