Gregory's Server|
10 comments
@tubetime is it worth trying to manually rebalance or just replace the cells?  @tubetime tried something like this before and was already aware that the controller might brick the pack if it sees one cell being disconnected but even with external voltage divider and voltage it bricked the pack, maybe some intermediate connection, no chance to revive it…  @fesix yeah I've heard that for some packs. I'm not sure it's the case for this one so it turns out that the original cells, Panasonic CGR17670HC, are long since discontinued, and the 17670 form factor is also gone. folks seem to recommend using 16650 cells instead. @tubetime I've tried looking for new ones a while back but they're rare these days. Might be a bad idea but a lot of Acer laptop batteries from 2010-2015 had Sanyo 16650s in them @tubetime @tubetime flashlight and vape stores tend to be the best. Those are pricey cells compared to the 18650 though. @tubetime nearest i could find is 17500 at batteryspace. dont be too weirded out by their 90s website, weve ordered from them at work, theyre okay. https://www.batteryspace.com/panasonic-li-ion-17500-cylindrical-rechargeable-cell-3-7v-830mah-a-size-3-07wh-0-25---un-38-3-passed.aspx |
here we go! it's a set of three paralleled cells. they are way out of balance. (L to R) 3.604V, 2.375V, 3.335V.