This 25R6M is a true 20A cell that performs well but not quite as well as the 25R5 variant. The “M” indicates that this cell was made in their Malaysia factory.
I don’t know if all of the 25R6M’s are like this but both of the ones I tested performed the same. They have the same capacity as the 25R5 but run at a lower voltage, i.e., they don’t hit quite as hard. Tyhe 25R6M does run a bit cooler than the 25R5 though.
I am rating the 25R6M at 20A and 2500mAh.
My thanks to IMRBatteries for donating the two cells for testing (www.imrbatteries.com)!
Test results, discharge graph, photos: https://www.e-cigarette-forum.com/forum/threads/samsung-25r-6m-variant-18650-bench-test-results-25r5-is-slightly-better.799799/
All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/
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