Hi Donnie,
Thanks - in hindsight, I should've been a bit more thorough in analyzing the information in this thread before asking the question

sorry about that.
I've watched the video and read the info; as the switch from 1.8 to 1.9 only expanded the NFZ, and the subsequent update to 1.10 apparently potentially messes up the video transmission, I understand why you are recommending to stay on firmware 1.8.
Good. It really is the best FW version.
As I explained, my Inspire 1 has been out of action for a long while as well. I just checked the firmware versions I currently have, and those are the following:
Aircraft: 1.7.00.90+
Remote Controller: 1.5.80
App: 3.1.42
Battery: unknown (no idea, doesn't show up seperately in the list)
The app must have updated automatically. I'm not sure if it's worth downgrading the app version back to some other version?
My knee-jerk answer is "yes." But a large portion of my drone work is done in remote locations away from WiFi and even cell service. So I can't risk an app that is going to demand I login to the DJI mothership before granting permission to fly. If that happens out on set, that would ROYALLY screw me in ways I can't even begin to convey in words. It would literally be my last time on any film set. I'd be blacklisted.
Here's an example of what the latest app will do to you. Make sure there are no children or women around when you play this video.
Edited by moderator - video removed because of language
Fortunately, this happened on a local job that wasn't time sensitive.
My point is that if you don't care about your drone being locked down randomly by total surprise for no apparent reason with no warning whatsoever, then by all means, use the latest version of DJI Go or Go 4. But if you're like me, and do NOT wish to be taken off guard by a locked down drone pending some kind of ridiculous test, then by all means, I recommend you roll back your app to v3.1.1. That is the latest version that requires no login. Ever.
It's not clear to me from the explanations above whether or not the app also (negatively) influences performance.
If you consider "grounded until you can get to a WiFi connection" an "impedance of performance," then, yes, the latest app DOES impede performance.
With regard to the
Aircraft firmware: I'm not even on 1.8 yet, as you can see

the question here is then:
1.) Should I upgrade to 1.8 at least and if so - where can I find that firmware? (DJI website only lists most recent one)
Read the description section of the video I have posted twice (won't post it again, as the moderator seems to frown on me posting the same video multiple times in the same thread). Detailed instructions have been painstakingly authored by me.
2.) I understand the batteries, gimbal and camera are upgraded together with the aircraft through the same process.
Exactly. And to clarify, you should run the FW update with each battery.
I just bought two new TB48s and I have no idea what "firmware" they are on (probably factory settings).
Though the Go app doesn't reveal the battery version specifically, I have noticed that the bird's FW gets reported as an older version if the battery is not updated. The only way to test this is to go into the About page with every single battery, and make sure all the FW data is consistent.
Even in case you would recommend to stay on 1.7 (current version), should I then worry about the battery firmware? Or would it be better (even if only for the battery reason) to upgrade to 1.8, upgrading the battery firmware along with that?
It's my understanding through my experience (no help from DJI) that battery FW does NOT update by simply plugging the battery into the inspire. The battery must be purposely updated via the Inspire FW update process (as outlined in this video):
Edited by moderator - just a repetition of what's been posted in post #22 above
@Donnie Frank can you please refrain from posting identical videos within the same thread.
Thank You
That said, I would upgrade to v1.8.1.00 because of the following release notes:
Remote Controller: the update process here goes through the app. In your video, you say to press and hold the little graduation cap icon, but I'm not sure I have that icon (potentially because my App is already at 3.1.42). As a result, I'm unsure on:
Well...I can only suggest you double check, because as far as I know, the icon has always been there. If not, you can always update your remote to the latest version, and then roll back using the method in my video. Remember, my video tells you how to roll back your RC from v1.7. GETTING to v1.7 should be a piece of cake. You are probably prompted to upgrade the remote at boot time. I know that every time I connect my Inspire the Go app, I am reminded to update my FW and my remote FW AND the app (I believe).
1.) Whether it's necessary to update the RC from 1.5.8 to 1.6 (I tried to find a list of changes with the "new" firmware but was unsuccessful);
I honestly don't know for sure, but my gut tells me that the bird will lose communication with the RC. Because DJI recommends upgrading the bird first anyway, it costs you nothing to upgrade the bird first and test for connection. If you have no connection, upgrade the remote to 1.7 and then roll it back to 1.6. And just so you know, RC v1.7 will NOT communicate with your Inspire FW v1.8.1.00.
2.) How to do it in practice, without initiating the update through the DJI GO App and then being stuck with an installation of the newest firmware...
Updating the RC should be done through the app. Updating the bird should be done via your MicroSD card. Between the two videos I made, I have given you all the tools you need to facilitate this. The missing piece of your puzzle is simply not reading the Description section of the videos.
A lot of questions, I know - thanks in advance for your input, I really appreciate the fact you're taking time to help people out.
You bet. Go back and revisit the videos and the Description sections. Your answers are there.
EDIT: P.S. I've seen some comments from people in youtube comment sections etc., stating they are unable to fly their Inspire 1 until they have completed a firmware upgrade...you also stated something about "connecting to the DJI mothership" in one of these posts. Is this a real danger? I.e., should I be on the lookout for some kind of prompt or actions I should avoid in order to ensure I can keep using the current (or 1.8) firmware without getting some prompt which prevents me from using the Inspire 1 until I have upgraded to the most recent firmware? Thanks.
You will be prompted by DJI Go App to update your FW
every time you launch the app. This is actually a blessing, because this action lets you know that your bird is fully and properly connected. If you do NOT get the FW update prompt, restart the app and/or unplug and replug the Lightning cable until you DO get prompted to update the FW. Yesterday, I had to restart the app 3 times to get it to connect properly. Once connected, it was rock-solid all day. Me and my partner did FIVE locations yesterday (Wednesday the 19th)(dual operator) and flew a total of 12 batteries. Everything was solid as a rock.