I'm looking for a tutorial on how to recover 18650 cells from laptop battery packs. Like what should I do, and what should I not do, how to test them to see their condition.
The way I'm doing it now is break the battery case with a screwdriver and pliers, then take out the batteries and remove the wiring, then put them on a charger to see the voltage. If the charger doesn't show anything I assume the cell is dead, if it shows below 2.5V I throw it away and if it shows above 2.5V I charge it to 4.20V at 500 mA. Then I discharge it at 1000 mA and the charger shows me the amount of current discharged in mA. I assume that's the available capacity. If it has above 1800 mA I keep it and charge it again, otherwise I throw it away.