funny acting 18650 cells (bummer)

So i got my hands on 2 e-bike batterys and started pulling them apart.

nice looking 50 pcs panasonic gray cells, testet for 2400-2500mha, but at the end of the day only 20 working cells, about 20 ventet cells and during pulling the nickel strips from the cells, some leaked, thise was a lot harder to dismantle then some of the other packs.

Next pack.
Mint green panasonic cells, think there where about 40 of them, and i had another pack with the same cells, so i was hoping to get about 70 of the same cells rated at 2000-2100mha. (then i would have had 2 packs)

But no no, alot of 0v cells, that i could not get back to life, tryed paring a old cell with the new and charge them, but always 0v.
some showed 4.1v but as soon the multimeter was used the voltage dropped fast, 10 sec and the cell was at 2.9v, my TP4056 does not see the battery, popped them in a 8cell ebay charger and got them back at 4.1v, did thecapacity test on them, 54mha some 78mha tryed in another capacity tester - all the same.

any way to get them back on track or is it just a waste of time.

Most 0v cells that doesnt take charge have their CID protection kickied in. Most likely due to heat issues

My commiserations ...I have a feeling ebike packs have usually been effectively worked to death and may not be the best place to harvest...

I'm convinced laptop batteries are prematurely terminated by software, so that the computer companies have an income from us buying new packs ...It's only because of this , that a DIY powerwalls cottage industry exists .

I have the same feeling at this point - i have had perhaps10 ebike packs at this point, but if lucky i can get about 10-15 good cells out of a pack, some of the laptop batterys, mabye 1 or 2 cell are dead, the rest is fine after af recharge.