|Seeking advice from expert HP collectors|
Message #1 Posted by John Smith on 22 May 2002, 11:45 a.m.
I'm seeking advice from some of the very knowledgeable HP collectors
in this list, as I'm fully confident you will be kind enough to offer
me very good guidelines.
The question is: I've got a number of HP calculators from the
Voyager series (HP-11C, etc), and all of them use three small button
cells. Now, as I can't use them all regularly, most of them have
spent a number of years carefully stored in a drawer, with their
batteries in place.
Now, though it has never happened to me, I'm aware that this is a very
dangerous policy, because of battery leakage potentially ruining the
machines, though I've never ever seen this happen in a Voyager
series model, on the contrary, their batteries seem to last for
decades on end.
Anyway, fearing leakages I decided to take out all the batteries from
them and return them to their storage place, but after thinking
about it for a while, I'm not so sure, i.e: could it also be bad
policy to keep the calculators without batteries indefinitely, for
many years ? Perhaps there's some internal electronics which would
resent not being powered for a very long time ? I've heard something
about 'dry capacitors' or the like, and I wonder if the lack of
'juice' could be as damaging as a potential battery leakage.
Just for example, an analogy from photography: should you keep a
large, complex zoom lens without using it at all for many years,
the internal lubricants necessary for positioning the glass elements (as
well as controlling the f-stop) would get stuck in place, so to say.
On the other hand, putting the batteries in for a while, then taking
them out again periodically would be a real chore, as we're talking
about a dozen calculators, and besides I fear this would result in
creating some usage marks on the battery compartment door on the
long run, or even damage the pressure pad eventually.
So, I would be very obligued if you could give me some advice on this,
and guidelines to keep my Voyagers stored safely for many years to come.
Thanks in advance.