I was putting my charging hub away and a little back cap came off the bottom to reveal a USB port. What is that for?
If you are talking about the DJI 4 battery charging hub that folds up for storage....yes there is a small micro USB port under a rubber cover. I believe it could be used by DJI to provide a firmware update to the charging hub for whatever reason. I believe that's what I read a long time ago after purchasing it......
Yes, I just looked at the DJI manual that came with the Fly More Kit. It's used for firmware updates when available.
Here are some pictures. The Mavic 2 Fly More Kit came with a user guide to explain the directions for the added accessories like the charging hub , car charger and the battery power bank adapter.
I've never seen a firmware update for the 4 Battery charging hub. I guess DJI just manufactured it with the ability to do so if they needed to. Hope this helps.
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