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ehat
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re: Silicon Valley Nation: 30-year battery life? Really?
ehat   12/12/2012 1:23:47 PM
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Radio Shack EC-4028 Calculator bought in ~92-93. Changed batteries in 8/12. Didnt have to but the screen was getting a little light.

daustins
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re: Silicon Valley Nation: 30-year battery life? Really?
daustins   12/12/2012 4:17:34 PM
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In 1981 I got a Casio hand calculator: LCD display, running on one AA battery. I never turned the power switch off. I used it daily for a decade and after 25 years found it, and it was still functioning. Under a quarter century of grime. I recall over 30 years ago when the first chip was released for flashing an LED with a very short duty cycle. It was postulated that the batteries (way before Lithium-ion and when NiCad was the Gold Standard) would last longer with a very slight current drain. It seems they were right.

davewooff
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re: Silicon Valley Nation: 30-year battery life? Really?
davewooff   12/12/2012 4:26:20 PM
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Not sure about longest lasting battery but it always makes me smile when I see a single AA battery quartz clock on a wall struggling to overcome gravity with the big hand stuck at about 20 minutes to the hour still ticking away.

RogerAW
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re: Silicon Valley Nation: 30-year battery life? Really?
RogerAW   12/12/2012 5:09:39 PM
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Today is the 21st anniversary of our 2 Sharp EL-506H calculators which are still running on their original batteries.

IDontUseTheForumSoWhyAmIForc
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re: Silicon Valley Nation: 30-year battery life? Really?
IDontUseTheForumSoWhyAmIForc   12/12/2012 5:40:20 PM
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When a quartz clock can no longer keep the arms moving its time to finally retire the battery. When I have a remote control or other device with an (allegedly) dead battery, I save it for use in the wall clock. I can usually get another couple months of power using the battery in the clock before it finally 'gives up the ghost'

bkeller137
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re: Silicon Valley Nation: 30-year battery life? Really?
bkeller137   12/12/2012 5:57:03 PM
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Across the hall from me, my colleague has an hp-15C calculator that he has had since college 25+ years ago that is still going on the original button batteries. He does only use it a few times a month on average, but still, that is a long time.

Brian Fuller2
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re: Silicon Valley Nation: 30-year battery life? Really?
Brian Fuller2   12/12/2012 6:36:09 PM
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Separate application, but my father bought a Sony transistor radio in the 1960s... one of the earliest. We still have it. It still works like a charm. We listened to some historic events on that thing...

Battar
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re: Silicon Valley Nation: 30-year battery life? Really?
Battar   12/13/2012 7:36:59 AM
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My 1988 Fluke 73 DMM lasted a very long time on its' original battery. A Casio digital watch also lasted nearly 10 years on its' lithium coin cell. Most batteries now would self discharge before then.

matthew43
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re: Silicon Valley Nation: 30-year battery life? Really?
matthew43   12/13/2012 5:06:45 PM
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I have a HP-15C calculator and a HP-12C. I haven't used them much in the last 7 years but when I pulled them out they still work. I didn't buy either one new so I can't tell you how old the batteries are except they are both more than 7 years. Some SOB stole my HP-15C about 12 years ago so I had to buy one on eBay. Why would an EE use any other calculator?

K1200LT Rider
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re: Silicon Valley Nation: 30-year battery life? Really?
K1200LT Rider   12/13/2012 5:21:56 PM
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I'm afraid to leave common, alkaline batteries in anything nowadays for very long without regularly checking them. I have had so many things destroyed when they leak and/or grow the white chemical "fuzz". It's really frustrating. Do modern-day batteries do this more than they used to?

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