If the secondary power rate is one fifth of the primary rate , {TAIL ~ the computer} may be operated for {HEAD ~ 96 minutes} from 100% battery reserves to 20%, i.e., 80% times 120 minutes 
If the secondary power rate is one fifth of the primary rate , { TAIL ~ the computer } may be operated for { HEAD ~ 96 minutes } from 100 % battery reserves to 20 % , i.e. , 80 % times 120 minutes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH