However, the states of {TAIL ~ charge} of one or more of the battery modules may vary from the nominal state of charge , for example, due to manufacturing tolerances of rechargeable cells of {HEAD ~ the battery modules} 
However , the states of { TAIL ~ charge } of one or more of the battery modules may vary from the nominal state of charge , for example , due to manufacturing tolerances of rechargeable cells of { HEAD ~ the battery modules }
OTH OTH OTH OTH OTH 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD