Samsung Galaxy Tab S9 has recently passed 3C certification, showing that the battery model is EB-BX716ABY, with a rated capacity of 8160mAh and a limited charging voltage of 4.47V. The typical value is estimated to be between 8400 and 8500mAh.
The Galaxy Tab S7 and Galaxy Tab S8 have the following battery information: Rated 7760mAh, typical 8000mAh.
The battery capacities of the Galaxy Tab S9+ and Galaxy Tab S9 Ultra haven’t been revealed yet, but there hasn’t been much evidence that the Galaxy Tab S9 Ultra and Galaxy Tab S8 Ultra are the same.