Bottom Line: This is an overrated and rewrapped cell which I am rating at 21A. Its capacity is significantly over its rating though, 2100mAh, which makes me wonder if a different cell was originally used. At 30A continuous it reached 94°C, much too hot to be its true rating.
It is identical in appearance and performance to the Sony VTC4, but the cell MXJO uses can change at any time.
The 18650 ratings table has been updated to include this cell.
Test results, discharge graph, photos: https://www.e-cigarette-forum.com/forum/threads/mxjo-yellow-30a-1600mah-18650-bench-test-results-just-a-21a-battery-but-2100mah.768535/
All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/