Hi Radu,
I would say that battery is a CR2430 or a BR2430 looking at the size
compared the ICs around.
I replaced it also in my 8970B but there I had a holder.
I had a few days ago an issue with my E4418B that battery was empty and
it has a similar solder type battery with 3 welded leads but it is a
BR2/3A. I searched on different sites and manufacturers for a 3 pin
compatible holder without luck. In the end I bought a small PCB adapter
to CR2032 on eBay and soldered 3 female pins on the board and 3 male
pins on the small PCB and plugged it in.
You can measure the battery size if you cannot read the numbers. 2032 is
20mm diameter and 3.2mm thickness.
I attached 2 photos. One is for a CR2430 battery with 3 tabs welded and
one is for an adapter PCB to CR2032 that was made by someone for an
8756A SNA as a reference of what you can do.
Link for the 8756A adapter and you can download the PCB layout.
Best regards,
Razvan
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On 27/02/2025 22:09, Radu Bogdan Dicher via groups.io wrote:
Thank you, Steve.
One other unfortunate effect?of the spot-welding of the top tab is that
the battery code is not visible. I can probably destroy the battery once
out, and read the CRxyzt?battery code, but would anyone have good info
offhand on it? I couldn't track this info in any of the manuals.
Or alternatively a link to the correct replacement would be even better,
of course. Some years ago, I'd be confident I could source it from
Keysight, but these days availability of parts seems to not quite be
there anymore.
Thanks a bunch!
Radu.
On Thu, Feb 27, 2025 at 12:53?PM Steve Hendrix via groups.io <
groups.io> <SteveHx@...
<mailto:[email protected]>> wrote:
On 2025-02-27 3:47 PM, Radu Bogdan Dicher via groups.io <
groups.io> wrote:
> If I understand this right, the correct procedure is to desolder
both
> tabs?... Given the top tab is spot welded, it may not be
reusable? So,
> replacing?this with the appropriate coin battery socket and a new
> battery is the way to go?
When you get to the bottom side of the PCB, I'm pretty sure you'll find
three "leads" sticking thru. Two go to the top side of the cell, and
one
to the underside. You'll need to carefully desolder all three to remove
the cell, then clean up the holes. Not sure if you will find a socket
that neatly fits the same footprint; you may have to just solder in the
new battery. Those tabs are a permanent part of the battery. If you
find
a socket that will fit, you can just buy a standard coin cell without
the tabs of course.
Steve Hendrix
