Not enough battery life to complete autotune

Hi, I have a F450 frame with T-Motors 900KV motors, 10x3 props and 4S 4.4 Ah batteries. Using the Pixhawk FC. The problem I am encountering is that there simply isn’t enough flight time to complete the autotune process. Best I got was it starting to tune yaw before my voltage alarm went off. Is there anyway of saving an autotune process, change batteries and then have it continue where it left off? Or am I resigned to buying bigger batteries?

AUTOTUNE_BITMASK is your friend, set it to 1 to tune roll, 2 to tune pitch, 4 to tune yaw 7 to tune them all.

Hot damn…did not see that one…Thanks!