so i got a pair of the 4sevens 26650 3900mah batteries, the GREEN one, they were working fine 3 weeks ago when i last used them, both were at 4.09 when i measured them and put them away, today i took them out for a quick measurement and one of them went down to 1.69 and the other still at 4.09, the one that is at 1.69 wouldn’t take charge from my nitecore i4 anymore, it would blink one blink on the first LED and then all 3 LEDs light up on the charger. anybody know what’s wrong? batteries were purchased new on Amazon couple months back.
it looks like a defective cell, your fortunate it would not charge because it could become very dangerous if it did
so that would be trash then Mr. Bort?
i’m afraid so, unless it has some sort of warranty