Bottom Line: In my previous tests I rated this ICR Tesiyi cell as decent, but very overrated at 25A/2300mAh. They’ve changed cells but it is still overrated. It’s now a 25A/2500mAh ICR cell but the wrap has not been changed in any way to indicate that the cell was changed. They have also switched from a double-layer wrap to a single one. In addition, Tesiyi has still not updated the wraps to indicate continuous/pulse ratings as they said they would months ago. If Efest can start doing this, with accurate ratings, then I would fully expect the other companies to be able to do so too.
All this aside, this is a good 25A ICR cell with good capacity and the classic flatter discharge curve that provides a more consistent vaping experience when using a mechanical/unregulated mod. It delivers more capacity down to 3.2V than the Samsung 25R and hits harder than the VTC4 at higher current levels.
Test results, discharge graph, photos: https://www.e-cigarette-forum.com/forum/threads/tesiyi-40a-2600mah-18650-bench-retest-results-changed-cells-a-very-good-25a-2500mah.747105/
All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/
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