The app seems like it is the most convenient way to update FW but I hear people saying they are plugging into their PC and using the desktop software.  Is there a reason one way is better than another?  

Also - I have 2 batteries - how do I do multiple batteries - does the app re-detect the need for an update with each battery?

Finally - I need an update to the app as well.  Should I update the drone first, then the app?  Or the other way around?  

Thanks

use DJi assistant 2 on your PC or mac.. and for batteries after completed update.. shut drone off, pull battery swap it out.. turn back on... click refresh button on the current firmware..

i dont like updating via wireless.. too much possibility for something to go wrong with a firmware update...  OS update or software update ..that's fine.. firmware update going bad = paper weight or messed up functionality, i just avoid firmware updates wirelessly if i can..  

Just two different methods to upgrade the drone, for me, I prefer to upgrade it via the PC.
The APP will re-detect the need for an update with each battery. When the battery's firmware version is inconsistent, an 'inconsistent firmware found' prompt will pop out. Here is a video below for your reference, you'll see this prompt at 1:25.
I prefer to update the APP first, then update the drone.

One suggestion, if you are going to update via PC/Mac, remove SD card before updating. I noticed last time I updated that the SD card was being loaded and ejected improperly, giving me warnings on my Mac.

The next time I flew the spark I was getting errors, the Spark would shut down on it's own as soon as I palm landed.

Reformatting the SD card cleared up my issues. I will be removing the SD card before updating from now on.

Where is the official DJI download page for Windows 10 Assistant 2?  Seems weirdly hard to find.

Drewson Posted at 2017-8-16 20:28
Where is the official DJI download page for Windows 10 Assistant 2?  Seems weirdly hard to find.

It's here:
http://www.dji.com/spark/info#downloads

Thanks - one more thing - will DJI Assistant 2 update my controller firmware as well?