With Assistant 2 for Mavic. You update the FW in your Mavic and once completed power off change batteries and start the mavic again. It will say. Incompatible FW found update? and you say yes. Do this for all your batteries.
I did last time. But that was last time. If they haven't changed the process then yes.
If you think about it If you have multiple batteries or buy a new one(s) or 2nd hand ones you are going to have to update a battery at some point after you have updated the Drone FW
Yes - that is how you update them as it's the inconsistency in the FW between the drone and other batteries that triggers the prompt to update them in the app.
Hi, thanks for the inquiry. There will be a message that would prompt on the application in any case that there will be a firmware update on the battery itself. Please let us know if you have other concerns. Thank you for the support.