Dead L-ion batteries or not?

[LED_ASAP]

I have a Li-ion battery pack from a notebook computer that no longer accepts any charge. It has been sitting in the quiet corner for maybe a year until I got a sample of this Li-ion Battery Charger IC. So I ripped the case open and found nine CGR18650 cells inside in a 3x3 array. When I separated the cells, I found them appear completely open-circuited to the multimeter (both digital and the old mechanical one). Are they completely dead? Any way to revive them?

 

[Doug S]

[ QUOTE ]
LED mods As Small As Possible said:
I have a Li-ion battery pack from a notebook computer that no longer accepts any charge. It has been sitting in the quiet corner for maybe a year until I got a sample of this Li-ion Battery Charger IC. So I ripped the case open and found nine CGR18650 cells inside in a 3x3 array. When I separated the cells, I found them appear completely open-circuited to the multimeter (both digital and the old mechanical one). Are they completely dead? Any way to revive them?

[/ QUOTE ]

If by open circuited you mean zero volts, they are just paperweights. Also true if they read less than 2 volts.

 

[snakebite]

they are goners.
but if you have the notebook you can get new cells and rebuild it.usually just 1 cell dies.it also kills the others in paralell with it.
the other bundles are usually ok
i put all new cells of same brand and lot in the packs and save the good ones i remove for projects.