A method of calibrating {TAIL ~ a capacity} of a rechargeable battery providing power for a portable electronic system, the method comprising {HEAD ~ the steps} of: 
A method of calibrating { TAIL ~ a capacity } of a rechargeable battery providing power for a portable electronic system , the method comprising { HEAD ~ the steps } of :
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH