Some smart battery packs include {HEAD ~ a microcontroller} which allows {TAIL ~ communication}, by way of a bi directional communication line, with the battery charger regarding various battery characteristics 
allows
Some smart battery packs include { HEAD ~ a microcontroller } which allows { TAIL ~ communication } , by way of a bi directional communication line , with the battery charger regarding various battery characteristics
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH