I just opened an old Dell battery I had, can someone identify what brand/capacity these are?
Although the laptop regarded the battery as dead, 3 of these batteries have less than 300mV, but the rest 6 have 3.96V! I don't have any other means to measure them apart from my DMM. Should I keep/use them or should I throw them also?
Those are LG ICR18650-B1’s.
They have nominal capacity of 2600mAh, and generally are very good batteries.
Keep ones that measured >3V, toss the remaining 3 ones.