On Feb 6, 2016, at 19:18, Chuck Guzis <cclist at
sydex.com> wrote:
If you're not interested in a "authentic" look, a plain old lithium primary
coin cell or two, with a blocking diode in this circuit should work for years.
I might tuck a CR123 in a holder inside the case somewhere, with a blocking diode. I think
I already have some suitable holders left over from when I did the same thing to repair a
bad NVRAM battery in an old HP digital oscilloscope. It was hard to get to the original
cell in that one (an AA sized one with wire leads, as I recall), so I replaced it with a
CR123 mounted remotely inside the back panel so that the next replacement will be easier.
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/