[Coco] Survey of Coco realtime clock users
robert.gault at worldnet.att.net
Fri Nov 30 20:03:28 EST 2007
Arthur Flexser wrote:
> Out of curiosity, how'd you go about replacing the battery? It looked like the
> battery was potted in epoxy or something and not at all easy to replace. On the
> other hand, it was rated to last 10 years. How long did yours hold out for? I
> never heard of a case of one finally giving out.
Not sure exactly when I bought it but a expect at least 10 years ago.
Right the battery is potted and I doubt it would be safe to try to
remove the epoxy. I measured the voltage on the exposed DS1216 leads and
found several with about 1vDC. The battery is a lithium and should be
Marty Goodman posted some suggestions on replacing the battery but I'm
not sure he actually did it. While one should remove the battery from
the circuit, I decided placing a new one in parallel would be sufficient.
Radio Shack has all lithium batteries at the same price so I bought the
largest one, about 5 to 6 times larger than the one in the Smartwatch.
Should last 50-60 years :) Solder connected it to DS1216 pin4 +v and
pin8 ground. Pre-tested this with two dry cells in series.
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