{HEAD ~ The method} 16, wherein power from {TAIL ~ the second battery} is not used when the cell phone is turned off 
{ HEAD ~ The method } 16 , wherein power from { TAIL ~ the second battery } is not used when the cell phone is turned off
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH