during a charge cycle. It'd been not holding a charge very long for awhile (I figured a bad cell was tripping the voltage protection on the board early) and it apparently has screwed its pooch while sitting unused for the past four months because when I went to charge it, it ended up VERY hot 7 hours later when I checked it and noticed the charging light was still going.
Hot enough that it had melted away the black shrink wrap on either side of one of the 18650 cells (presumably the bad one) as well as a piece of the blue wrap on that individual cell but the whole pack was super saturated with heat. I moved it to the tile floor of my entry hall inside a porcelin container, and let it sit there. Two hours later the battery cells were still warm to the touch. I've clipped off the leads to re-use and yanked off the circuit board from the cells and am going to just chuck them all into an Ikea store battery recycling chute later today. Oh all the cells have a round silver sticker with a holographic Q on them, not sure if that was supposed to mean they passed quality control or anything but it sure might help identify them to a bad batch.
Anyone else dissected their packs and found such stickers on their batteries ?
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