Quickies part 2

[nomadpete]

4 minutes ago, facthunter said:

I'd go for the 24 hour clock anyhow

Of course you would - it's not ambiguous - with the battery out it'll be correct only once a day.

[facthunter]

That aspect of the argument is already dealt with.  An aside but related. The Competence of a pilot is inversely proportional to the size of his watch.. Nev

Edited 6 hours ago by facthunter

[onetrack]

HINT - If you want battery-operated clocks to perform properly, don't use alkaline batteries in them. Use only "heavy duty" carbon zinc batteries. This is nearly always written on the clock battery installation instructions.

 

Carbon Zinc AA batteries are 1.2V. Alkaline and Ni-Cd, and Ni-MH AA batteries are 1.5V.

 

I purchase all my batteries from the Reject Shop, their prices are much lower overall.

 

[spacesailor]

Ni-cd are 1.2 volt. You seem a little mixed-up in your batteries  .

spacesailor

[onetrack]

Spacey, I did note, now you mention, that the Ni-Cd AA batteries I have are 1.2V. But the Ni-MH rechargeable batteries and Alkaline AA batteries I have, are 1.5V.

 

Now I start looking, I find some Carbon Zinc batteries are 1.5V - but the Carbon Zinc batteries I buy are 1.2V.

 

Let me summarise by saying, "check the battery voltage to see if it meets clock specs before installing". My personal experience is that any alkaline batteries I have installed in battery operated clocks have caused them to be inaccurate. But the 1.2V carbon zinc batteries I use provide good accuracy and battery lifespan.

 

Edited 3 hours ago by onetrack

[nomadpete]

22 minutes ago, onetrack said:

but the Carbon Zinc batteries I buy are 1.2V.

That's usually because tey are nearly flat.

 

Carbon zinc cells are nominally 1.5v but gradually drop  - they do not have a good discharge curve. At 1.2v they still have a little life left.

 

Other chemistry types have better initial voltage stability followed by a fast drop in voltage at end of life.

[onetrack]

The heat must be frying my brain. I was convinced my Carbon Zinc batteries were 1.2V and all the others were 1.5V. Now, after thorough examination (gee, those figures are hard to read on batteries), I find I've produced all the voltage figures, arse-about.

 

The Carbon Zinc and Alkaline batteries are 1.5V and all the rechargeable batteries are 1.2V. My apologies for stating all the above totally incorrect voltages.

 

https://uk.gpbatteries.com/blogs/news/a-guide-to-common-rechargeable-battery-words#:~:text=Here's something to remember%3A While,1.2 volts in later charges.

[facthunter]

On of the handiest things in my kit as a small battery tester BT 168. Best carbon zinc, Duracell Ultra. Longest lasting.  Nev

[old man emu]

Dunno about Zulu time, but I've experienced Fiji time.

[pmccarthy]

Zulu time was experienced by Jack Hawkins and Michael Caine.

[facthunter]

It's still in Use for AVIATORS. Nev