Talk:Rechargeable battery

message: You guys need to add a section discussing the merits of freezing or refrigerating rechargeable batteries to rejuvenate them (restore their ability to hold a charge). Trust me this is not a myth. I have quite a few batteries in the freezer right now.--God Ω  War 01:46, 3 August 2006.--Patl (talk) 13:15, 6 May 2017 (UTC)
thread_title:  Freezing 

message: I've heard that leaving a small device (such as a cell phone or PDA) on while recharging can shorten the life of a battery.  Is there any merit to this? D4S 06:00, 14 January 2007 (UTC)
replies: text: It probably depends on the device.  If the voltage and current delivered to the battery aren't affected (because there's ample power from the wall socket) then certainly not.  If there's less juice delivered to the battery, it might make a difference, or it might just charge more slowly.  The best thing to do is to read the owner's manual, but there may be a more general answer we could give. -- Beland (talk) 18:20, 19 March 2010 (UTC)
thread_title:  Recharging while power is on 

message: I have a high-power red laser pointer (containing a standard silicon laser)  that runs for about 2 hours on two single-use CR123A 3V 1000mAh cells (total voltage around 6 volts). I wish to use rechargeable batteries of the same voltage/power but have been told by the seller that rechargeables could damage the laserpointer.  Is it really possible for rechargeables which provide exactly the same voltage and power (3v, 1000mAh per cell) to cause damage?
Sorry if this is not the right place to ask such a question, but I knew the clever people at Wikipedia might have the answer :)
Thanks in advance for any help. —The preceding unsigned comment was added by 81.110.75.70 (talk) 14:20, 18 March 2007 (UTC)
replies: text: Even though rechargeables often produce slightly different output (as noted in the article) and don't last as long, I doubt it would be damaging.  The manufacturer should know best. -- Beland (talk) 18:20, 19 March 2010 (UTC)

text: Yeah, depends. You can use fewer parts if you use specific battery characterisitics, cheaper product but sloppy design. Example is cheap White LED flashlights: 3.7 V lithium battery, 3.2 V LED forward voltage, 10 Ohm battery internal resistance, therefore ~50 mA current and bright but within many LED current limits. If you use 3 Nickel Cadmium cells which have lower internal resistance (~1 Ohm each) you fry the LED with 150 mA. A light with 3 AG10 alkaline button cells (1.55 V each; about 5 ohms total) for 4.5V and a 25 Ohm series resistor (in the flashlight) would still work with 2 lead acid cells (4.4 volts and 2 ohms total). Laser diodes will emit at low currents but only emit coherent light (lase) at high currents, near the point where they fry. (Many non-laser LEDs emit coherent light at high currents.) Rapidly pulsing the current with high peak current but low average current ("strobing") also increasing efficiency and visibility. The circuitry for peak current limit and pulse generation should be fairly battery independent.Shjacks45 (talk) 02:45, 28 December 2010 (UTC)
thread_title:  Can rechargeables damage devices? 

message: A section should be made how the batteries can be connected for recharging. This can eg be done using WiTricity or a regular solid wire connection
KVDP (talk) 14:29, 26 January 2010 (UTC)
replies: text: Yet another believer that Tesla was God. Will the miracles never cease?  — Preceding unsigned comment added by Shjacks45 (talk • contribs) 02:51, 28 December 2010 (UTC)
thread_title: Connecting the battery for recharging

message: I suggest include in the article what is a charge cycle . --Nudecline (talk) 11:46, 24 June 2010 (UTC)
thread_title:  Charge cycle 

message: Another wiki had Lithium-Cobalt(III)Oxide and there was an industrial battery promoted by a Vancouver company using Lithium-ManganeseDisulfide. The NiH2 battery should have a redirect to fuel cell technology as that's what it is.  The Nickel Metal Hydride and Platinum in the Nickel Hydrogen batteries both act as fuel cells, the Raney Nickel ("Metal Hydride") catalyst (like Palladium metal) stores Hydrogen in its molecular lattice. In both cases Nickelic(III)Hydroxide serves as the oxidizer.    There should be a note about battery chemistry: acid aqueous, alkaline aqueous, and non-aqueous. There is a -0.8 volt shift between hydrogen in acidic (where H has zero volt potential) media to hydrogen in Alkaline media, also affecting other metals such as zinc and aluminum. The charging efficiency of aqueous batteries is affected when hydrogen potential is lower than the metal, even considering the lower hydrogen ion concentration in alkaline solution. Shjacks45 (talk) 03:14, 28 December 2010 (UTC)
thread_title:  There were other batteries 

message: There was a lot of poorly (ie none at all) referenced data for the "efficiency" of the various battery chemistries, there are several ways to report the efficiency noted in the following documents:
http://my.ece.ucsb.edu/York/Bobsclass/194/LecNotes/Lect%20-%20Batteries.pdf
http://www.evs24.org/wevajournal/php/download.php?f=vol4/WEVA4-4002.pdf
If a comparison between the batteries is to be made they will need citations with the same form of measurement. When discussing energy storage the Energy Efficiency is clearly the most representative measure, rather than the (larger) Coulomb or Voltage Efficiencies.
The Efficiency column has been removed until a suitable set of references can be obtained for the data.  — Preceding unsigned comment added by 57.70.32.210 (talk) 03:56, 1 July 2013 (UTC)
thread_title:  Efficiency 

message: The rechargeable alkaline battery doesn't belong in the table. It's simply an alkaline battery sold at inflated prices with some bull story. The few user reviews i've read were negative. Not even sure if they are still being sold, the precharged low self-discharge NiMH has probably removed the last niche market they had. And since those have become the standard NiMH battery sold in the shops, maybe that discharge figure of 30% for NiMH should be changed, or they should be listed separately? Ssscienccce  (talk) 01:54, 9 December 2013 (UTC)
thread_title:  Alkaline 

message: All instances of 'current flow' are confusing and fundamentally wrong. Current doesn't flow, current *is* a flow of charge:
:Since a current is a flow of charge, the common expression "flow of current" should be avoided, since literally it means "flow of flow of charge.
:- Modern College Physics: Sears, Wehr, & Zemanski
See also: ELECTRIC CURRENT IS A FLOW OF ENERGY? Wrong.  — Preceding unsigned comment added by 82.73.226.224 (talk) 15:01, 16 December 2013 (UTC)
thread_title:  'Current Flow'... 

message: I was told by Leclanché SA (Switzerland) that they sell their "TiBox" for 10.000,- CHF/US$ for private customers.
Power content of the "TiBox" is around 3200 Wh --> 0.32 Wh/US$
213.180.184.217 (talk) 16:51, 26 November 2014 (UTC)
replies: text: But an 8-pack of rechargeable AA cells at Wal Mart is .68 watthours/$US. What's a "TiBox" ? --Wtshymanski (talk) 17:54, 26 November 2014 (UTC)
thread_title:  Lithium–titanate 

message: the chart/photo captioned "Graph of mass and volume energy densities of several secondary cells" list aluminium cans as a type of battery.  — Preceding unsigned comment added by 66.169.187.131 (talk) 09:04, 11 June 2015 (UTC)
thread_title:  Bad chart 

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thread_title:  External links modified 

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thread_title:  External links modified 

message: "company claimed"
We should be very careful with these, are many companies are quick to make bold claims to inflate their value, and then fail to deliver.
Heck, there are companies claiming free energy out there...  — Preceding unsigned comment added by Musaran (talk • contribs) 12:07, 7 July 2016 (UTC)
thread_title:  Company claims 

message: There are several mistakes:
* Why LiFe are separate, although they are just have different type of cathode?
* LiPol are not real LiPol, it is just a hybrid, if not only polymer separator?
* Why certain types of LiIon are separated and all other are together? There are a lot of different chemistry combinations.
That is why I decided to remove it--Divega (talk) 09:55, 15 September 2016 (UTC)
thread_title:  Mistakes at File:Secondary cell energy density 

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thread_title:  External links modified 

message: Can we mention (and make a seperate page) for the Ferrocene-viologen flow battery designed by Harvard University ? Appearantly, it lasts up to a decade and it's water-based, so at its end-of-life, the recycling would be very easy with this battery-type.
references:
http://www.wired.co.uk/article/flow-battery-energy-grids-harvard-university
https://www.seas.harvard.edu/news/2017/02/long-lasting-flow-battery-could-run-for-more-than-decade-with-minimum-upkeep
KVDP (talk) 14:27, 22 April 2017 (UTC)
thread_title: Lifespan and cycle stability

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thread_title:  External links modified 

message: Wikipedia is not a collection of randomly associated facts. A list of randomly selected headlines is not suitable content for an encyclopedia article. Electric cars have their own articles and detailed discussion of that application belongs in those articles, not in this overview. We should explain what "charging time" means, not just recite random news bites. We should explain what the objectives of research in rechargeable batteries is, not just note down Professor Wesley Crusher's latest 3-d nanotechnology research paper. --Wtshymanski (talk) 01:52, 6 September 2017 (UTC)
thread_title: Newspaper clippings

message: Under ”Charging and discharging” the image “Secondary Cell Diagram.svg” contains in the right part the words Charge, Negative and Anode. One of the words is wrong. When charging a secondary cell the negative electrode is the cathode. To call the negative electrode an anode (only) is a misuse by some lithium-ion cell researchers and manufacturers. Professor George Zheng Chen at University of Nottingham has suggested using the word negatrode for the negative electrode to avoid confusion . Or maybe negode could be a suitable word, just two syllables like anode. The words anode and cathode were introduced by Michael Faraday in 1834 and in his paper these two words are clearly related to the current direction, not the electrode polarity. Adding some arrows to the image, indicating the current direction and the ion movement direction, would be helpful in understanding the electrochemical process during charging (or discharging). --Stenallan (talk) 22:58, 10 February 2018 (UTC)
thread_title:  Image needs a correction 

message: I've resolved my own issue. To summarise (my deleted, original comment and the results of my findings), I tried to update a section with references to Battery University, but it turns out the site is on the spam blacklist because of unreliable/anecdotal information being passed as fact (source). Hopefully this will save any future editors running into this issue some time. --Achiox (talk) 19:05, 3 November 2018 (UTC)
thread_title:  Citing "batteryuniversity.com"? 

message: This section is mixing up battery chemistries. It talks about sulphation in lead-acid batteries left in a discharged state, and then goes on to state that batteries should be kept at a charge of 30-70%.
In reality, lead-acid batteries suffer from sulphation when left at any state of charge other than 100%. The 30-70% state of charge is a figure given for lithium-ion batteries, and then solely from a long discredited source. In general, nickel-cadmium, nickel-iron, nickel-metal-hydride can be kept in any state of charge from 0 to 100% without damage. These chemistries can be stored indefinitely at zero charge. However, the lithum-ion chemistry should never be allowed to discharge below 3.0 volts per cell (2.4 volts for some older Sony chemistries) as irreversible damage will occur. They can be stored at any voltage above the minimum given, but attention should be given to the cells self discharging below that voltage especially if there is a monitoring circuit providing a current draw. 86.146.209.211 (talk) 13:01, 30 January 2019 (UTC)
thread_title:  {{anchor|disputed}}Damage during storage in fully discharged state 

message: ACCU and Accu (battery) both redirect here. The former page describes it as "a battery that can be restored to full charge by the application of electrical energy", and I notice a lot of eBay listings for batteries have the word "accu" in the title. I assume it's short for "accumulator", but is it slang, and where does it come from? China? -Ashley Pomeroy (talk) 14:32, 15 September 2019 (UTC)
replies: text: Five minutes on the Web suggests this might be another gift that Wikipedia has given the language - I found a site where some translators are arguing about this and citing Wikipedia as their example of usage. It's not English as I understand it - there seem to be German batteries with a trademark of "Akku". Here's where someone from East Cheem pipes up and disparages my parochialism by saying he just bought a new accu for his lorry on the way to a football match.--Wtshymanski (talk) 00:11, 16 September 2019 (UTC)
replies: text: "Akku" translates from German to English as either 'battery' or 'accumulator' (dictionaries variously giving either or both). German sourced rechargeable batteries have, in the past, been sold under the pseudo translated term of 'accu' which could be regarded as an abbreviation for 'accumulator'. 'Accumulator' is an archaic [British] English term for a lead-acid rechargeable battery with particular referral to the single cell lead acid battery used to power the filaments in very old valve (vacuum tube) radios.  — Preceding unsigned comment added by 81.157.153.165 (talk) 12:41, 16 September 2019 (UTC)
thread_title:  "Accu" 

message: A discussion is taking place to address the redirect :Date of discharge. The discussion will occur at Wikipedia:Redirects for discussion/Log/2021 March 23#Date of discharge until a consensus is reached, and readers of this page are welcome to contribute to the discussion.  Hog Farm  Talk 05:50, 23 March 2021 (UTC)
thread_title:  "Date of discharge" listed at [[Wikipedia:Redirects for discussion|Redirects for discussion]]