choro said:
[snip]
That is exactly what I do. I check it against my computer's
clock just after I have resynced it with an Internet time server.
As I suspected. But that very small error wouldn't bother me at all.
Well, I figure that if I am going to use a watch, that it should
have the correct time to within about one minute.
Same here, but I can go a lot of weeks before I need to set it.
6-8 weeks for me.
Casio also has a trick for changing the battery. Simply changing
the battery does not work. There is some little trick to doing it.
This is not user-friendly.
Casio! <spit>
My next watch is very unlikely to be a Casio.
Sincerely,
Gene Wirchenko
Yes, there is a microscopic spring. And you've had it if you lose it
unless you are lucky enough to find it like I did. And you also have to
short something. It is all in the instructions available on the
Internet. Changing the battery becomes a major operation. Begin by
taking a couple of Paracetamol tablets and then start with removing one
end of the bracelet. And make sure you have a magnifier so you can spot
that tiny spring! A very powerful magnet comes in handy if you drop that
damned spring.
But the battery in their digital watches seems to last around 10 years.
Why bother replacing the battery?
I'm impressed
They took a simple thing like changing a
watch battery, and turned it into brain surgery.
http://forums.watchuseek.com/f43/how-change-battery-g-shock-19704.html
So apparently, there is a gold plated contact labeled "AC" next to
it, and the gold plated contact has to be raised to the same
potential as the (+) top terminal on the battery. it's some kind
of reset, after you've changed the battery.
You need two kinds of tweezers. Non-conducting tweezers while
handling the battery. You don't want to short (+) and (-)
on the battery, while using tweezers, so that's where the plastic
tweezers come in. The precision metal tweezers can be used for
the "AC reset" procedure (use the sharp points, to do the reset).
Opinions vary on the function of the tiny spring. I'm not sure
I believe them. One person suggested it "coupled quartz vibrations",
which is highly unlikely. A second suggested the spring was
"part of the alarm". A third reason, might be usage as a contact
to touch the back plate of the watch, but for that to make sense,
the back would have to be metal. (I have a multimeter, that uses
a spring like that, for an electrical contact to a shield over
the PCB.) If the back pf the watch was plastic, the
spring would be pointless as an electrical contact.
My watch, instead of a clasp for the battery bay, the metal back
of the watch provides any compressive forces needed to hold things
in contact. That makes it a slight nuisance to rotate the back
and screw it down on the threads its got. But, it's a lot
simpler than the Casio procedure. And my watch doesn't need to be
"reset", as it starts at 12:00 on its very own.
And my battery only lasts 2 years, tops. My watch uses an LR44.
According to this, it's about 60 milliamp-hour, perhaps a third
of the CR2032 on a computer motherboard (220 mAh). Considering the
age of my watch, it's gone through a *lot* of batteries. I've easily
spent more on batteries, than the original price of the watch.
http://www.batteryonline.com.my/index.php?act=viewProd&productId=39
Paul