UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - NiCad Battery

SeanStevens · 17th Jan 2022, 11:49 am

Hi all

This is a cry for help.

I've got battery packs that now refuse to take (or possibly deliver) a decent charge. They are quite old. So I've popped one apart and intend to replace the NiCad cells with new ones.

There is a heat sensitive resistor within - that I believe detects if/when the battery gets hot and turns off the charger.

The component that I need help with is used to bridge two of the cells (they are all in series - this component is in that string). It is totally flat and the markings on it don't seem to appear in internet searches.

QKC9
? L26

I've measure it's resistance - it is close to perfect continuity.

What I'm worried about is that this component may be the issue with the packs not delivering a good charge. The one pack I have disassembled seems to contain cells that have a good charge and capacity - but this does not get to the application reliably.

Any ideas what this component is or how to test it?

SEAN

17th Jan 2022, 11:49 am	#1
SeanStevens Octode Join Date: Sep 2009 Location: Bath, Somerset, UK. Posts: 1,033	NiCad Battery - Internal Component ID Hi all This is a cry for help. I've got battery packs that now refuse to take (or possibly deliver) a decent charge. They are quite old. So I've popped one apart and intend to replace the NiCad cells with new ones. There is a heat sensitive resistor within - that I believe detects if/when the battery gets hot and turns off the charger. The component that I need help with is used to bridge two of the cells (they are all in series - this component is in that string). It is totally flat and the markings on it don't seem to appear in internet searches. QKC9 ? L26 I've measure it's resistance - it is close to perfect continuity. What I'm worried about is that this component may be the issue with the packs not delivering a good charge. The one pack I have disassembled seems to contain cells that have a good charge and capacity - but this does not get to the application reliably. Any ideas what this component is or how to test it? SEAN Attached Thumbnails __________________ There are only 10 types of people, those who understand the binary system, and those who don't.