Bottom Line: This “40A” Kdest is just a rewrapped and overrated 15A cell that can boil water at only 30A continuous. It reaches a dangerous temperature at 35A continuous. Its “pulse” rating of 80A is absurd and brings me to the point of apoplexy just thinking about it. The first pulse at that level would drop the cell’s voltage to under 2.5V….a less than useful voltage. Both of these Kdest cells were identical in performance and appearance to the Samsung 30Q.
Kdest has printed “MADE IN KDEST” on the metal can which is interesting considering that this is a rewrapped Samsung cell.
The 18650 ratings table has been updated to include this cell. The two cells were purchased directly from Kdest (http://www.kdest.com) for the purposes of testing.
Test results, discharge graph, photos: https://www.e-cigarette-forum.com/forum/threads/kdest-white-40a-3100mah-18650-bench-test-results-preposterously-overrated-absurd-pulse-rating.778265/
All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/
18650 current ratings and safety grades: https://www.e-cigarette-forum.com/forum/blog-entry/18650-safety-grades-picking-a-safe-battery-to-vape-with.7447
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