csmith@plains.UUCP (Carl Smith) (02/21/90)
When I told a friend of mine that I was getting an HP-28S he told me to
practice taking the batteries out and putting them back in before I put
any programs into it, so I would be able to do it within the one minute
time, later when it was full of valuable stuff.
The very first time I couldn't get the third battery out, and it took me
about 3 minutes, and I got a memory lost. During the 4 or 5 times I
did this, I found that my HP will hold the memory for almost two minutes
without batteries.
Another curiosity. After having my HP for only a month, I got a low
battery indicator, so I replaced the batteries. Then I tested the old
ones and two measured 1.4 volts, and the third measured 0.3 volts.
obviously it was a defective battery..........
Carl Smith (no fancy signoff :)hsu@eng.umd.edu (Dave "bd" Hsu) (02/21/90)
In article <3504@plains.UUCP> csmith@plains.UUCP (Carl Smith) writes: >The very first time I couldn't get the third battery out, and it took me >about 3 minutes, and I got a memory lost. WAC Mier-J. in his book mentions something about stronger springs in newer 28S'...I bought mine last September and still found that the third Duracell stuck when I changed the batteries last week. For the record, I grab my calculator at the joint, face in a safe direction, and use a slinging motion to eject the third battery. Sends that sucker flying every time. -dave -- Dave Hsu Systems Research Center hsu@eng.umd.edu The Maryversity of Uniland, College Park, MD 20742-3311 "We plan ahead. That way, we don't do anything right now."
yap@me.utoronto.ca (Davin Yap) (02/22/90)
hsu@eng.umd.edu (Dave "bd" Hsu) writes: >In article <3504@plains.UUCP> csmith@plains.UUCP (Carl Smith) writes: >>The very first time I couldn't get the third battery out, and it took me >>about 3 minutes, and I got a memory lost. >For the record, I grab my calculator at the joint, face in a safe >direction, and use a slinging motion to eject the third battery. >Sends that sucker flying every time. I complained to HP about not being able to get the batteries out of mine and they assured me that I wasn't "smacking" it hard enough :-) . It's reassuring to know that they designed these things to be smacked! davin --
frankw@hpcvra.CV.HP.COM (Frank Wales) (02/23/90)
In some article Davin Yap (yap@me.utoronto.ca) writes: >I complained to HP about not being able to get the batteries out of [my HP28] >and they assured me that I wasn't "smacking" it hard enough :-) . >It's reassuring to know that they designed these things to be smacked! Ah, but is it reassuring to know that they're designed such that they *must* be smacked? :-} -- Frank Wales, Guest of HP Corvallis, [frank@zen.co.uk || frankw@hpcvra.hp.com] Zengrange Ltd., Greenfield Rd., LEEDS, England, LS9 8DB. (+44) 532 489048 x217
) ) (02/23/90)
csmith@plains.UUCP (Carl Smith) writes: >The very first time I couldn't get the third battery out, and it took me >about 3 minutes, and I got a memory lost. During the 4 or 5 times I >did this, I found that my HP will hold the memory for almost two minutes >without batteries. This is odd. I once (yes, *only* once!) had a memory lost. Being the cautious sort, I wanted to drain my hp28s completely of all power so that it word come up completely in default state (an extreme cold boot). To do this, I removed the batteries overnight. The next morning, I put them back in. Surprise! Everything was still there! Obviously the batteries had not been out long enough. So I tried 24 hours. Everything was still there. Finally, I left them out for 48 hours. When I replaced the batteries, everything was (finally!) cleared. Maybe it takes a while to charge up the internal backup battery? Also you said you found a defective third battery. Maybe this kept the internal battery from being fully recharged. .oO Chris Oo. -- Christopher Lishka 608-262-4485 "Somebody said to me, `But the Beatles were Wisconsin State Lab. of Hygiene antimaterialistic.' That's a huge myth. John lishka@uwslh.slh.wisc.edu and I literally used to sit down and say `Now, uunet!uwvax!uwslh!lishka let's write a swimming pool'."--Paul McCartney