For example, {HEAD ~ a user} may select certain components to be used, thereby varying the secondary power rate, or may set the battery threshold at which power is switched to {TAIL ~ the secondary processor} 
For example , { HEAD ~ a user } may select certain components to be used , thereby varying the secondary power rate , or may set the battery threshold at which power is switched to { TAIL ~ the secondary processor }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL