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1 comment of this product found across Reddit:
fj333 /r/batteries
1 point
1970-01-20 09:23:13.333 +0000 UTC

Your database is so great! Thanks for putting that together.

Coincidentally I just ordered this for charging 21700 batteries. I wonder if I could use it for measuring the L91s? Worth a try I guess, but I don't know if it would attempt to "charge" them and cause some sort of electrical risk.