Yesterdy a new version has been released which is relevant for Mavic Air: https://www.dji.com/mavic-air/info#downloads
The release note states the following:

I wonder what Norton will say?

Thudd Posted at 2018-3-24 13:09
I wonder what Norton will say?

Just ignore it is my advice. I have abandoned Norton some 20 years ago or longer already and nothing suggests that it ever got better since then.

Nice to have DJI improve on things

Thank you.

Thanks , Will download it to my DJI update file.

Thanks for sharing.. downloading now

I wonder what that means "the battery could not be upgraded under loader status"? When I spoke to DJI after first purchasing the Spark, they alluded to the fact that the battery life was improved in a later firmware from the 16 minute flight time to achieve more consistent time while in Sport Mode - meaning flying in Sport Mode was improved upon and resulted in approximately a 16 minute flight time (normalized for consistent conditions). I'm guessing the Mavic Air in Sport Mode now achieves a more consistent flight time close to 21 minutes if you took off and landed in Sport Mode?

Thanks for the update , I'll download it later today.