(02-24-2016 06:09 PM)wojtek Wrote:  But just count, on average 1800 mAh for a single nimh accu...

(02-24-2016 06:09 PM)wojtek Wrote:  ...would give 1mA for some 500 hours till the voltage drops to some 1V from 1.2V. With 100uA the accu would last for 5000 hours or 200 days.

(02-25-2016 02:26 PM)Artur - Brasil Wrote:  N cells here are difficult to find

(02-25-2016 03:24 PM)Artur - Brasil Wrote:  Actually not expensive, but, I really will try this funny project.
I consider all yours ideas and suggestions, really, but this will be my first contact with such converters and a good experience with them.

(02-25-2016 05:24 PM)Artur - Brasil Wrote:  Hi,
I have the 41 which has already the balls connected to main board.
About the connector that come from wall power supply, it's quite simple! Do you have one usual HP power supply?
....
I'll post some pictures when I get home.

(02-25-2016 02:05 PM)wojtek Wrote:  Sorry, I should have been more specific here. I was talking about low discharge accus, like eneloops, which typically have about 1800 mah

(02-25-2016 02:05 PM)wojtek Wrote:  Regular nimh accus perhaps can have even 2500mah, according to their makers, but, if you leave for a month or two a fully charged low discharge (with 1800 mah capacity) and a regular accu (with 2500mah), their charge will become the same (because of much bigger discharge feature of regular accu). Later with time every low discharge will win over the regular nimh accu. After three or more months regular nimh will become completely empty but low discharge will still keep more than 80% of its initial charge.

(02-25-2016 02:05 PM)wojtek Wrote:  As for the calculations in the second part of your post, I was talking about 41c in the off state only. I do not know how much juice 41c takes while running, certainly it depends on what 41c is doing.
(...)
I have no data on power consumption of 41c during typical average usage (but would like to know it if anybody knows where to find it.

(02-25-2016 08:51 PM)Dieter Wrote:  Panasonic (or formerly Sanyo) rate their standard AA Eneloops at 2000 mAh typical capacity (1900 mAh minimum).

(02-27-2016 12:09 AM)wojtek Wrote:  I enclose a picture of mine HP41c powered by a converter 12-5.5V and single nimh AA accu.

(02-27-2016 01:37 AM)rprosperi Wrote:  Many of these posts refer to "accu" - is this another name for battery? Is it a slang term, or maybe a translation?

(02-27-2016 01:37 AM)rprosperi Wrote:  Many of these posts refer to "accu" - is this another name for battery? Is it a slang term, or maybe a translation?

(02-27-2016 06:48 AM)Dieter Wrote:  In some languages "accu" is a false friend, for instance in German. Here the term "battery" ("Batterie") usually refers to a disposable, e.g. Alkaline battery, while rechargeable batteries are called "Akkumulator", or shorter and more common, "Akku". I assume this also applies to some other languages where it may be confusing that in English both disposable and rechargeable cells are simply called "battery".

Dieter

(02-27-2016 08:11 AM)wojtek Wrote:  

(02-27-2016 01:37 AM)rprosperi Wrote:  Many of these posts refer to "accu" - is this another name for battery? Is it a slang term, or maybe a translation?

No :-0, no slang, no translation, it was only because of my laziness, typing many times "accumulator" in a single post was tooo much for me. I hoped it should be understandable. OTOH (on the other hand :-) mine Am Heritage Dict says: "accumulator" - chiefly Brit. an automobile storage battery, and Longman dictionary says: "accumulator" - esp. BrE, a type of battery ...

(02-27-2016 08:18 AM)wojtek Wrote:  

(02-27-2016 06:48 AM)Dieter Wrote:  ... rechargeable batteries are called "Akkumulator", or shorter and more common, "Akku". I assume this also applies to some other languages where it may be confusing that in English both disposable and rechargeable cells are simply called "battery".

Thank you, I can remember that I met this word (accu) probably in Karl Marx "Winnetou". I had not undestood then what was its meaning, but certainly it could mean "false friend".

• A 'false friend' in linguistics is called a term in a foreign language looking similar like a term in your native language but meaning something different. Some English examples for German readers: sensitive, handy, become, etc.
• 'Winnetou' was written by Karl May, a Saxonian fake traveller.
• Karl Marx was a different guy. Based on your name, I'd guess you wouldn't have got along with that confusion some 30 years ago.
• If Karl May ever wrote something looking like 'accu' he must have meant anything in a (for him) foreign language - since the German term for a rechargeable battery is 'Akkumulator' as mentioned by Dieter above. I admit having read a lot of his books when I was a kid though don't remember that piece of text.
  

(02-27-2016 09:06 AM)walter b Wrote:   Now that's going to become a real chaos.

• A 'false friend' in linguistics is called a term in a foreign language looking similar like a term in your native language but meaning something different. Some English examples for German readers: sensitive, handy, become, etc.
• 'Winnetou' was written by Karl May, a Saxonian fake traveller.
• Karl Marx was a different guy. Based on your name, I'd guess you wouldn't have got along with that confusion some 30 years ago.
• If Karl May ever wrote something looking like 'accu' he must have meant anything in a (for him) foreign language - since the German term for a rechargeable battery is 'Akkumulator' as mentioned by Dieter above. I admit having read a lot of his books when I was a kid though don't remember that piece of text.
  

Enjoy!

d:-D