Dead NIMH Cells

[Crash]

Havng not used my cells for quite a while (2-3 years!) I have noticed that I am struggling to get them to accept a full charge. Each of my packs appear to have 2 cells with very low voltage and are presumingly dead.

Now here comes the silly question.........can they be revived/saved??

[Chequered Flag Racing]

Originally Posted by Crash

Havng not used my cells for quite a while (2-3 years!) I have noticed that I am struggling to get them to accept a full charge. Each of my packs appear to have 2 cells with very low voltage and are presumingly dead.

Now here comes the silly question.........can they be revived/saved??

can you charge to 2 cells as singles?

it maybe that the other 4 are fully charged

do the other 4 cells get wrm to hot when charging the pack?

if they do you will need to discharge each cell in the pack on a Novak Smart Tray or similar to get all 6 voltages equal

[stoff]

Sometimes they can be revived but you will need a charger that can charge a single cell. Charge at quite a hight amperage to see if you can bring it back to life.

I had some EnerG 4600s that were sat for a while. They were stripped to single cells and individually charged. I think out of 20 cells only 2 were dead.

[Crash]

These are intellect 4200's.
Just checked my charger and it will only go down to 4 cells but I'm going to stop by a local track tonight to see some old mates and I'll have a look what their chargers can do. Have even considered connecting the dead cells directly to a variable power supply and 'force' some energy into them.

[MattW]

With Intelect 4200's I would advise extreme caution - as some batches of these were the most volatile cells that we saw.

[tonymon]

ye i had one blow up the other week, very load bang right next to me! forced me to go lipo too! so yes volatile cells

[Big G]

Originally Posted by MattW

With Intelect 4200's I would advise extreme caution - as some batches of these were the most volatile cells that we saw.

+1 I had a pack melt things in the car

enerG 4600's never had a problem with