slow charging cells

capacity testing samsung q15 cells on an opus bt, recharging on an vc4, some cells take a long time to charge, capacity is good, IR within normal range, but these cells lag behind so much, what woulld happen if i inclueded them in a build, 10s9p, they get there eventually, i could make a whole couple of strings from these slow chargers, the battery will have bms, voltage moniters and two 5s leads for balance charging

how are you checking the IR? if you are using the opus or vc4 to check the IR, it won't be that accurate. I would separate the slow charging cells, when you build a pack you want the cells to be as perfect as you can get them. Any cells that differ from the others will give you balancing problems, or self discharging in a pack.

so is this cell slow to charge because its discharging, it has been set aside, next pack will have balance leads, i knew IR values can be out by testing, and the opus manual warns of it, thanks for the info