I use a very simple system for a brand new jet. After fully charging my battery pack , leave the system on while playing around with the control ontil the battery its dead then log the discharge time. Again recharging the battery and connecting a voltmeter to the receiver and exercise all control to see how must voltage lost under load (Making sure my voltage lost is above the receiver operating limits). Then after every flight checking my battery ontil i am comfortable. And I always used two receiver and two battery.

P.s