{HEAD ~ The power} for performing {TAIL ~ the operational functions} is provided by the battery when the interface is inactive and by the host device when the interface is active 
for performing
{ HEAD ~ The power } for performing { TAIL ~ the operational functions } is provided by the battery when the interface is inactive and by the host device when the interface is active
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL 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