Yes, that's right. We found this site - Amperex Technology Limited. But there are no links to the store or to parts (cells). someone tried to write to them, this was answered - "...we do not conduct retail sales of our products..."
But anyway, thanks for the information.
The cells themselves can be composed and the controller should recognize them, but the point is in their sizes. You need to either look for cells by size or make a new package based on these sizes, but then you can increase the capacity of the cell to the desired power. For example similar
6 cells of this assembly will weigh 2.6 kg. with a capacity of 26000 mAh. TB48 weighs 659 g capacity 5700 mAh This option is probably best → with a capacity of 9800 mAh, the weight will be 1020 g. A preliminary calculation (theoretically) shows a flight time of 25-30 minutes.
I was doing some research for the Inspire 2 batteries and found the battery manufacture for DJI. You might be able to find some information on there website. DJI uses a intelligent system or (BMS/ smart battery management system). As you most likely know, DJI feels the user should not do any maintenance on their batteries and when things are not working.... just buy a new one. The TB50 I took apart has the company and part number on each cell. LiPo battery 16.26Wh 3.8v N576223A0779
I found the manufacture website however, I have not pursued any additional information.