I bought my Mavic in February of 2017 but updated the firmware for the very first time only yesterday. I was expecting after the update was completed that when I swapped out the battery that had been used during the update for the spare battery and then entered DJI Go that it would tell me I needed to update the battery's firmware, but I got no such message. I guess there's nothing to worry about if there's no warning message, but why wasn't I told to update the firmware of the spare battery? Is that not how it works?