Ultrafire 16340, No voltage

[matt304]

2 out of 4 Ultrafire 880mAH batts which I just purchased do not charge or show any voltage.

Is this happening a lot?

I ask because each pair came from different light companies.

 

[Norm]

Are they protected? Tried resetting the protection?
Put them in your charger for a couple of seconds.
Norm

 

[matt304]

Are they protected? Tried resetting the protection?
Put them in your charger for a couple of seconds.
Norn

Correct. They are 880mAH-rated, protected cells.

You were right about resetting them.

This was odd. The Ultra Fire Rapid Charger could not get either of the two cells to charge. Both cells would also give 0.0V readings on a multimeter.

I did what you suggested, but instead used my power supply set at 4.2V @ ~250mA and they immediately reset.

Thanks for the heads up.