It should be apparent that {HEAD ~ many other scenarios} for extending {TAIL ~ computer time} are possible, depending on the predetermined battery reserve level, the secondary rate, and the primary rate 
for extending
It should be apparent that { HEAD ~ many other scenarios } for extending { TAIL ~ computer time } are possible , depending on the predetermined battery reserve level , the secondary rate , and the primary rate
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH