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