Joe,
I was told by a wise sage to fly a new batt 5 times using 1/2 capacity and no or little full throttle.
Rotate the batteries through and log each flight.
Let the battery cool off before recharging.
Pre-warm the batts before use (I'm still trying to figure out a practical method).
I charge at 1C thru the balance port of a procell 10S charger.