Talk:Nickel–metal hydride battery

External links modified
Hello fellow Wikipedians,

I have just added archive links to 4 one external links on Nickel–metal hydride battery. Please take a moment to review my edit. If necessary, add after the link to keep me from modifying it. Alternatively, you can add to keep me off the page altogether. I made the following changes:
 * Added archive https://web.archive.org/20111114174228/http://www.inobat.ch/fileadmin/user_upload/pdf_09/Absatz_Statistik_2008.pdf to http://inobat.ch/fileadmin/user_upload/pdf_09/Absatz_Statistik_2008.pdf
 * Added archive https://web.archive.org/20150221044822/http://www.greenbatteries.com/chart.html to http://www.greenbatteries.com/chart.html
 * Added archive https://web.archive.org/20080111155214/http://sg.biz.yahoo.com:80/070123/1/464td.html to http://sg.biz.yahoo.com/070123/1/464td.html
 * Added archive https://web.archive.org/20120425083048/http://208.173.184.182/oem/rechargeable/Nickel/nickel_metal_tech.asp to http://208.173.184.182/oem/rechargeable/Nickel/nickel_metal_tech.asp

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Cheers. —cyberbot II  Talk to my owner :Online 14:47, 28 August 2015 (UTC)


 * Note. The second reference no longer linked to the intended chart, and the archived version does not either. That cite in article reverted with flag. 86.153.131.220 (talk) 17:05, 3 November 2015 (UTC)

Typographic usage
I checked the last modification made by 86.145.215.191 who undid modifications made by voidxor, and the claims regarding the use of "an" vs. "a" and double spaces after periods:

- As regards the "a" vs. "an" debate, it only took checking a couple of English courses for beginners site. One such instance is https://www.englishclub.com/pronunciation/a-an.htm, which takes the example of "an FBI agent" and states "You just need to think about the sound, not the writing."

- As regards the double space debate, one can simply refer to the Sentence spacing article of the wikipedia, which clearly confirms what voidxor says. This is confirmed by many other, widely available sources. I was not aware of a word processor still using the 2 spaces convention, but I can guarantee that the big boys (MS Office, Open Office etc.) don't do it. Jlbruyelle (talk) 19:08, 26 November 2015 (UTC)


 * Unfortunately your linked site is not discussing English but American a superficially related languange. In English 'an' only ever precedes a word commencing in a vowel (or a silent 'h' such as in 'an hour').  From page 1 of Collins dictionary of English usage, "An is used instead of a before nouns and adjectives that begin with a vowel or a silent h".  It also discusses a and an before abbreviations and notes that the 'a' or 'an' is used depending on the sound unless the abbreviation expands to words where it is used according the first letter of the word.  Thus "an NiM-H battery" is wrong because it expands to "a nickel metal hydride battery" where 'nickel' commences with a consonant.


 * British Standard 5261 which describes "copy-editing: For editors, authors and publishers" specifies two spaces between sentences. A Wikipedia article is not a wikipidia editing policy (and everyone knows that Wikipedia articles are rarely accurate which is why they cannot be used as references for other Wikipedia articles).  In any case, the article is not clear on the point, or even claims that one way or the other is neither right nor wrong. In English, the British Standard is correct by definition.  86.145.215.191 (talk) 14:51, 27 November 2015 (UTC)


 * I am not aware of any difference between various flavours of English in the "a" vs. "an" usage: the same rules apply in both US and UK English, with just discrepancies due to apllying the same rule to a few words starting with an "h" which is spoken in a country and not in the other - not the case here. Please refer to the Cambridge dictionary (that's Cambridge in England, not Harvard) which has a page for both national varieties (http://dictionary.cambridge.org/grammar/british-grammar/a-an-and-the). If I follow your reasoning one could argue that one should say "a FBI agent" since the 'F' expands to "federal", but it would be a mistake since no one pronounces this "a federal bureau of investigation agent". Likewise, I have never heard anyone say "Nickel MH", just the letters ("en-eye-em-aich"), so the correct usage is "an NiMH battery". If you know an alternative common use in your country to say "Nickel MH"(do you really?), then both "an NiMH" and "a NiMH" can be acceptable, but you are nt correct in precluding the use of "an NiMH" on the grounds that you don't like the usual (in my experience) "en-eye-em-aich" pronunciation.


 * One more point to address your first sentence: the |"Wikipedia manual of style" does not require the use of a particular variety of English, so you are not correct in systematically trying to enforce UK English in articles. Wikipedia does require to maintain consistency throughout the article, though, so if you find an article written in US English it would be a bad idea to "correct" it. This article is in UK English as far as I can see, cf. the "aluminium" spelling.


 * Re. the spacing: I admit to not owning BS5261 - BTW do you refer to the current 2005 version? The previous one is 40 years old, and can no longer be used as a reference since it has been superseded and may contain substantial differences. Regardless, voidxor is perfectly correct in saying that double spaces are deprecated for internet use (you can easily check this yourself with an HTML editor and your browser), and moreover Wikipedia silently enforces the single space rule by collapsing all the multiple spaces. For example this is a single space, this is a double space , and this is a series of ten spaces . Incidentally, you may not have noticed but your comment on dual spaces comes out without the double spaces you had taken care to use. In conclusion, it is quite useless to "correct" spaces, except by removing all the extra spaces that just waste bandwidth and are not seen. I must add as a side note that I have just quickly checked all the journals and books that I have handy, US and UK alike, including scientific papers (experience taught me that Elsevier is really fussy when it comes to typography) and I confirm that none of them uses double spaces. So much for the BS standard, if no one uses it.


 * I therefore restore the previous version by voidxor. Please do not try to add double spaces again, it would not work anyway. You are free to restore the "a NiMH battery" bit should "a nickel MH battery" be the most common pronunciation in the UK. Jlbruyelle (talk) 22:36, 28 November 2015 (UTC)


 * Done. I note there were six other instances of "a NiMH ..." throughout the article so 'an' was not consistent anyway.  I was not trying to 'enforce' UK English as you claim.  I had already noted that the English variant was British English.  86.145.215.191 (talk) 14:01, 29 November 2015 (UTC)

C? -- below 0.1 C (C/10), ????
..."below 0.1 C (C/10)", "trickle charge at C/300"

Could someone please expand the definition of C? Perhaps give an example such as a AA NiMH at fast and also trickle charge?...with amperages?...and danger zones/limits? Is a 15 hour charge considered a trickle charge? Examples do so much to move questionable understanding into certainty.

Thanks! --2602:306:CFCE:1EE0:119B:90AC:21F7:9541 (talk) 03:24, 1 October 2017 (UTC)Doug Bashford


 * See Battery charger and Battery (electricity); C-rate is not a NiMH-specific concept. It may be (I am not the voice of experience) that the level of detail you seek is greater than the encyclopedic format mandates. --Mathieu ottawa (talk) 16:29, 17 October 2017 (UTC)


 * Thanks, Good links! But actually I was looking for less detail than that, just a few words or sentences to solidify the explanation given. As the definition is, and the importance of C, I think the article may violate Wiki's guidelines against jargon etc.  I may be oversensitive to overlinking, particularly lazy linking, but Battery charger may be apropos here. --2602:306:CFCE:1EE0:6591:4FC6:3374:5763 (talk) 18:18, 18 October 2017 (UTC)Doug Bashford


 * Mathieu is 100% correct, the NiMH article is not the place to repeat general definitions that are valid for any type of battery and, as such, already covered in the proper articles. On a related note, I had to revert your recent mods: please do not modify a wikipedia article without proper knowledge and understanding of the information you are giving, to the risk of misleading the readers.Jlbruyelle (talk) 15:09, 18 October 2017 (UTC)

Spelling? nickel-metal hydride battery or nickel metal hydride battery
This article uses two spellings of nickel-metal hydride battery. One spelling with a hyphen and one spelling without a hyphen between nickel and metal. It would be nice if the spelling is consistent throughout the article, and if a "most" preferred spelling is used.

04:40, 24 December 2020 (UTC)

Self-discharge rate
From the infobox: 36.4–97.8% at 45 °C Low self-discharge: 0.08–2.9%
 * SDR    = 13.9–70.6% at room temperature

I was taught in physics class that a rate is the change in physical quantity over an instantaneous interval of time.

It's impossible in physics to have a rate without a time, but apparently not so impossible here on Wikipedia. &mdash; MaxEnt 21:04, 22 December 2021 (UTC)

Information on cleaning leaks and risks would be helpful
Searching for specifics on cleaning devices after an nimh battery has leaked is not easily found on the web, with some sites having conflicting information (using baking soda vs vinegar to neutralise the discharge). From my understanding, vinegar (or similar product) can be used, which is what I used in the end, although one source simply recommends water.

There is also conflicting information on the health risks of leaked electrolyte, again some sites indicating serious risks with others more chilled. (I suspect the reality is skin contact is innocuous provided you wash it off fairly quickly, whereas other exposure such as in the eyes etc. can require urgent medical attention). A balanced response would be beneficial. 41.13.250.217 (talk) 17:44, 3 January 2022 (UTC)