Fasttech protected panasonics….
:~
Yea… I’m afraid they are the ones that sealed it for me.
3 out of 4 failed in one report. 75% failure for him.
People like when something seems to be a great deal. Its natural. And they don’t fail on everyone I’m sure. The protection doesn’t have a chance to fail in normal use, its usually not tested until there is a problem.
Panasonic NCR18650B is safe down to 2.5v so one could do a series of tests on the overdischarge protection at least. Protection is often set to kick in before 2.5v.