21700Bottom Line: This is an overrated 20700 cell (20mm diameter x 70mm length) that performs well but not quite as well as the Sanyo NCR20700A. Its appearance is similar to the Panasonic/Tesla cell, with its 5-leg top contact, but I cannot confirm that this is indeed the Panasonic cell. There are differences in the top crimp seal and tooling marks.
This iJoy uses a paper top ring insulator that should not be exposed to juice or otherwise it could swell and soften, possibly increasing the risk of the insulator being damaged when put into or removed from a device or charger.
I am rating this iJoy at 30A and 3000mAh.
My thanks to Evolution Vaping for donating the two cells for testing (https://www.evolutionvaping.co.uk/ijoy-20700-40amp-battery.html)!
Test results, discharge graph, photos: https://www.e-cigarette-forum.com/forum/threads/ijoy-40a-3000mah-20700-bench-test-results-overrated-but-a-good-30a-battery.798323/
All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/
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