I just recharged  two 9V Alkaline !!  - Page 1
Forum section: electronics / projects

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 01, 2011, 03:52:54 pm
content: I was ready to order some rechargeable 9V batteries, from the new series with low self discharge time.By looking the extreme pricing on ebay ( price& shipping), I did one action of despair,and loaded on my Ansmann " Energy 8 " charger, two 9V Alkaline who was having less than 4V in them.Those batteries was in one device that it was forgotten on, and the batteries was had one quick discharge and their usability ended.By inserting the batteries on my charger, the unit recognized the batteries as rechargeable.It automatically start one process called as " automatic refreshing ", this lasted for 20 minutes,later on the charger start to normally charge the batteries with 70mA current.In about two hours later the batteries was fully charged.They did not run hot, as NiMH does when they are charging.And now they are charged and still on the charger in the trickle charge.Before few months we had a similar thread, some one claimed that he was able to charge for at list three times,one Alkaline before it turns to really unusable.I am speechless right now, I am a professional I was playing so far the game about using the Alkaline by the book.Are those 9V another animal ? compared with the AAA or AA .. I do not know.

author: Zero999
author_rank: Super Contributor
timestamp: August 01, 2011, 04:12:08 pm
content: I've tried charging ordinary alkaline batteries before. The charge up well but don't seem to hold the charge for very long.. Try taking it out of the charge and seeing how long it lasts for.

author: IanB
author_rank: Super Contributor
timestamp: August 01, 2011, 05:00:45 pm
content: You are charging them way too fast. You would want to charge a 9 V alkaline about 5-10 mA, no more.As far as physics is concerned, if a chemical reaction can go one way, it can go the other way. Therefore all batteries can in theory be recharged.However, regular alkaline batteries are not physically designed for recharging, so attempting to charge them will not work very well. They will not hold much charge after recharging and they will be very likely to leak. You an use this as a "MacGyver" technique when in a pinch, but it will not be satisfactory for normal usage.Otherwise, that was a nice experiment and a good way to learn about batteries.

author: sacherjj
author_rank: Frequent Contributor
timestamp: August 01, 2011, 05:36:41 pm
content: Yep. You can get the voltage back up to where it should be, but I've never seen more than 1/4 capacity for "recharged" alkaline batteries. Also, the predictability of the capacity is not there.

author: ejeffrey
author_rank: Super Contributor
timestamp: August 01, 2011, 06:38:15 pm
content: There are also special rechargable alkaline batteries. They were briefly popular when the amp-hour capacity of NiMH batteries was a lot lower. They were only good for something like 25 charge cycles, but they had the higher operating voltage and lower leakage of alkalines with a reasonable capacity (at least for the first charge!). My understanding is that the 'magic' was about half and half designing the battery to withstand the charge cycle and the microprocessor controlled charge circuit that could do a charge profile that was safe and effective.Modern low-leakage, high capacity NiMH batteries are superior in almost every way. They charge faster, have more charge cycles, and lower internal resistance, while having good capacity and low enough leakage for most applications.

author: Richard W.
author_rank: Regular Contributor
timestamp: August 01, 2011, 06:38:54 pm
content: You can recharge alkaline batteries, but the risk that they will leak is much higer... I wouldn't do this.

author: sacherjj
author_rank: Frequent Contributor
timestamp: August 01, 2011, 07:10:04 pm
content: The advantage of rechargeable alkaline wasn't in capacity, but very low self discharge. Until low self discharge NiMH (like Sony Eneloop), that rechargeable alkaline was one of the only games in town.Its chemistry was different than normal alkaline, to allow for the recharging. Rayovac brand name for these was Renewal. These worked well in even long term use devices, such as remotes.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 01, 2011, 10:22:37 pm
content: I had deliberately delay my first reply so to have some proofs at hand.I have good news and bad news.The good news first.The two 9V batteries was some no-name called as CEGASA, and I found them dead in one device that a friend of my bring in my work shop for inspection.Those batteries got charged normally and when I got them from the charger I measured the volts.Common DMM 10.42VMy battery tester with load: 9.99V ( both cells)6 hours laterbattery tester with loadCell 1) 9.60VCell 2) 9.52VBad news: I tried to charge a VARTA Alkaline ( Type HIGH ENERGY)I was aware that the battery was had about 7V remaining voltage (by my battery tester),I set it on my charger for 5 hours, it did pass the " automatic refreshing " mode,and started to charge.But after all this hours it got no charge at all !!And I own 10 of those VARTA and still have them in action.I just tested only one VARTA, and it looks that it does not get any charge.Interesting enough if you look at the top contacts, there is holes that you can see some of the internals of it.I would say that they look as ventilation holes to me.And by looking those holes I thought that they are an warranty that those are truly safe to charge them.About leakage, I think that the 9V blocks they hide in them smaller Cells , and some how it is like one container in to another container.I do not feel safe to charge other Alkaline type other than a 9V block.But the point looks to be that some Alkaline had an chemistry that responds about recharging, and some others does not.The removed VARTA from the charger looks to be in worst condition than before measuring almost 5.5VI just set the VARTA on the charger for one last attempt about charging it.If it fails again, then I will be correct that the internal chemistry matters, but you are unable to tell of what brands and models behaves positively about recharging, if you did not try to charge them even once.

author: baljemmett
author_rank: Unknown
timestamp: August 01, 2011, 11:42:54 pm
content: Quote from: Kiriakos-GR on August 01, 2011, 10:22:37 pmTo be honest the only thing I'd take as indicating it was safe to recharge a battery is the fact that it's sold as rechargeable; although there are some alkaline cells that are explicitly sold as rechargeable, the majority aren't. Of those, some may take a charge, and others might just decide to burst open and spew nasty shit all over the place. Personally, I'd rather not risk it in general; maybe that just makes me a wuss thoughQuoteYes, they're made up from smaller cells; a lot of PP3 batteries contain six LR61 cells, which are almost but not quite the same thing as AAAA cells (they're very slightly smaller). Others contain a stack of flat rectangular cells instead, etc.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 02, 2011, 12:00:33 am
content: Well if the VARTA fails to be charged, I will show pictures of the internals of it.Is it known the max current of those LR61 in mAh ?

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 02, 2011, 12:45:38 am
content: This is why I admire this damn battery tester.The VARTA at the second attempt, it did fooled the charger and showed as charged.The DMM it got fooled too.But not the battery tester !!Yes now I know how those AAAA looks like.

author: RCMR
author_rank: Frequent Contributor
timestamp: August 02, 2011, 02:49:53 am
content: Some years ago (when NiCad and NiMH cells were expensive, I did a fair bit of experimentation with recharging alkaline cells.I found that in most cases you can easily get 10-12 good recharge cycles out of them but *only* if you don't allow them to drop below 50% charge before recharging.Once the cells were allowed to fall below 30-40% capacity, the recharging process was less successful and the amount of capacity that was recovered was significantly reduced.Of course these days it's just more cost-effective to buy an LSD NiMH, since 2200mAH AA cells can be had for about $1.30 and 800mA AAA ones are about $0.80.

author: ElektroQuark
author_rank: Unknown
timestamp: August 02, 2011, 06:32:58 am
content: Quote from: Kiriakos-GR on August 01, 2011, 10:22:37 pmwww.cegasa.comCEGASA is a Spanish company with many years and well established in the battery market. The do low-medium-tech standard batteries, but it is not a no-name company.They are about 60Km from where I live.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 02, 2011, 11:04:11 am
content: Speaking about famous brands in Greece.The most remember able from my childhood until now ( simple and Alkaline ) are :UCARBERECVARTAPanasonicToshibaAbout rechargeable the last 10 years:SanyoAnsmannBack to the topic.By inspecting the CEGASA its clear that they use6 X LR61The VARTA uses6 X AM6 (type) MN1604 ( cell code)And so my own first conclusion will be that the LR61 is charging friendly !!I count 19 hours after their charge, the CEGASA looks solid 9.40V on the tester.Well EdoNork, thanks for the info, unfortunately there is no info on the batteries ,of where they was made !!Viva Espana

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 02, 2011, 10:37:20 pm
content: My experiments are still going, I found one Duracell Alkaline 9V block with LR61,it does respond about charging too.The LR61 looks almost identical in shape with the AM6 (type) MN1604.Its one LR61 haves small ventilation gaps at the positive lead.The Duracell is now up to 90% of charge and still goes.

author: Fraser
author_rank: Super Contributor
timestamp: August 02, 2011, 10:41:18 pm
content: Around 10 years ago it was quite common to find chargers specifically designed to recharge partially discharged Alkaline cells. AS has already been stated, it was essential to 'top-up' a cell rather than allow it to become completely discharged.The chargers were quite clever and used a low current so as to avoid the issues of the cell not being of a vented design. I purchased a quality brand of charger at work in order to do my bit for the environment (I did technical training that discharged around a dozen PP3 batteries per week !).My personal experience was very mixed. Some brands of alkaline responded well to being 'topped-up' whilst others actually deteriorated as a result and had a shorter than normal run-time in equipment. It was very much trial and error.Now the serious bit...... I discontinued charging alkaline cells when it became apparent that many cells that had been subjected to the charging treatment started to leak electrolyte. Some might say this was obviously going to happen, but remember, I was using a charger specifically designed to avoid cell seal damage through gassing.The kit I used the batteries in costs around £15000 per unit so a battery leak would be very bad news indeed. Fortunately all cell leakages occurred whilst the cells were sitting on the shelf waiting to be used. Using a cell that will damage your kit without warning is not really economic sense so I discontinued the 'green' charging strategy and just accepted the cell usage rate. Before anyone asks why I didn't use rechargeable cells....the kit they are used in is custom designed and required greater than 1.2V per cell or 8.4V per battery. At £15K the manufacturer expected the user to be able to afford alkaline batteriesThe charger ended up sat in a corner until I gave it away. The new owner experienced the same issues as me and binned it. The availability of such chargers has diminished since rechargeable cells became more affordable, and in decent capacities.I have enough problems with ProCells spontaneously leaking, without increasing the risk via charging, so I personally stick to Ni-Mh where possible or accept the cost of alkalines in equipment.A side note.... it is NEVER a good idea to attempt the recharge of a Lithium button cell....they go bang very easily !.........BUT..... did you know that a primary lithium memory back-up cell is often recharged during it's life within equipment ? Yes its true. A memory back-up battery often uses a silicon diode to protect it from the supply rail to the volatile memory chip(s). When equipment is powered, the diode is reverse biased but a tiny leakage current passed through it and into the lithium cell. This is why equipment that is used very regularly or 24/7 often has a memory back-up battery that far exceeds expected life. I have seen equipment that is 25 years old and the memory battery is still providing a good charge indication. This leakage current is often mentioned in memory back-up cell specs as the acceptable current that may pass into the cell without damage.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 02, 2011, 11:42:10 pm
content: Quote from: Aurora on August 02, 2011, 10:41:18 pmoh yes I have do a seminar about those batteries, due the fact that I repair digital cameras.Those special hard to find memory back-up cells..They do leak too, I got an used small Olympus camera from Germany,the memory back-up cell was dead due leakage, I order a new cell from USA,but the camera is still unable to hold time or calendar.Something go wrong other than the battery , and I am unable to find it.

author: Zero999
author_rank: Super Contributor
timestamp: August 03, 2011, 09:25:20 pm
content: Quote from: Aurora on August 02, 2011, 10:41:18 pmThat's very bad design. Your expensive equipment is only using 50% of the potential battery capacity of the alkaline cells. Any equipment worth its salt should work down to 1V per cell, preferably 0.8V, so a device designed for 9V should work down to at least 6V, ideally 4.8V.NiMH cells also charge up to around 1.4V, a 8.4V NiMH battery will be 9.8V hot off the charge and if your equipment doesn't like that, it's plain shit.

author: Fraser
author_rank: Super Contributor
timestamp: August 03, 2011, 11:34:03 pm
content: Hero999Thanks for your comments but I should state that it is a manufacturers recommendation to not run the equipment on rechargeable batteries. The battery 'charge remaining' monitor gets all screwed up when using rechargeables. "Shit" they may be with regard to power source, but blame the military for that as they set the specOperationally the kit is definitely not "shit"

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 03, 2011, 11:42:42 pm
content: People does any one haves any wild guess about the average mAh that the Alkaline 9V block can deliver ?

author: Unknown
author_rank: Unknown
timestamp: August 03, 2011, 11:53:06 pm
content: Quote from: Kiriakos-GR on August 03, 2011, 11:42:42 pmYou can refer to the manufacturer of the specific battery in hand. For example:http://data.energizer.com/PDFs/6LR61BA_CEU.pdf

author: nukie
author_rank: Frequent Contributor
timestamp: August 03, 2011, 11:53:52 pm
content: Spot weld three lifepo4 in series and you get serious bang per buck rechargeable. They are available in the market but bear in mind its 10.8v when fresh out of the charger, let it sit for a while so it drop back to nominal voltage. lifepo4 are very tough can wistand abuse. hard part is finding the right size.imho, don't waste your time messing with alkaline, they are nasty when they leak.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 04, 2011, 12:41:02 am
content: Thanks people, I also found another technical document by Googling around about MN1604http://www1.duracell.com/oem/Pdf/Mn1604.pdfAnd I will share my true problemI have one mini calibrator device that has also an output of 100mA .And it looks to be an overkill current for the 9V Block.The good part is that the calibrator can also use rechargeable, and even haves an external plug to stick the charger on it.My small adventure about recharging Alkaline, and by learning the truth about their piss poor design of the 9V block,makes me more confused than before.By the Duracell chart the battery can deliver 50mA for 22 hours before dropping down to5VOn a rough calculation at 100mA its less than 11 hours down to 5V.The calibrator with the on board battery tester rejects the batteries at6.35VAnd so every few hours one 9V block dies.It looks that the 9V blocks has an average of 1000mAhAnd the rechargeable fall sort in to a max of 200 - 250mAh.Nukie gave a nice idea about an alternative rechargeable,I will explore this path too.

author: IanB
author_rank: Super Contributor
timestamp: August 04, 2011, 02:56:22 am
content: Quote from: Kiriakos-GR on August 04, 2011, 12:41:02 amYou can buy dedicated lithium ion solutions. See here for example:http://www.batteryjunction.com/9v-lithium.html

author: nukie
author_rank: Frequent Contributor
timestamp: August 04, 2011, 06:24:08 am
content: What I meant is safe chemistry LiFePO4http://www.batteryspace.com/browseproducts/LiFePO4-Rechargeable-Cell--9V-180mAh-5C-(1.62Wh--0.9A)-Drain-Rate.HTMLBut I am not a big fan of batteryspace powerizer cells.

author: Zero999
author_rank: Super Contributor
timestamp: August 04, 2011, 08:13:45 pm
content: Quote from: Kiriakos-GR on August 04, 2011, 12:41:02 amIt does annoy me when equipment vendors don't take the battery life into consideration.I wouldn't use a 9V battery to power anything which uses much more than 50mA and would design it so it runs down to a low as voltage as possible. I certainly wouldn't use the LM7805 to power a logic circuit. I'd go for a low drop-out regulator such as the LM2936-5.0 which has a dropout voltage of 200mV so the device should work all the way down to 4.7V, as most 5V logic works down to 4.5V.QuoteI've never seen a 1000mAh 9V PP3 battery, rechargable or otherwise.You can ge 300mA 7.2V NiMH batteries which will last longer than 250mAh 8.4V batteries in devices designed to work down to 5V.EDIT:What about a 9.6V NiMH battery?The site linked below sells 230mAh 9.6V batteries.http://www.nevadaradio.co.uk/batteries-and-chargers/maha-mhr9v?utm_source=google&utm_medium=product%2Bsearch&utm_campaign=xml%2BfeedI think you should be careful though. Some chargers may not charge it fully, the voltage could be over 12V hot off the charger and it's probably a good idea to recharge it when the voltage drops below 6.4V (0.8V per cell), even if your device still works.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 04, 2011, 10:11:09 pm
content: Quote from: Hero999 on August 04, 2011, 08:13:45 pmWell that was a rough calculation coming from the Duracell document.The document that Alex had posted it is less hopefulabout the mAh.I did a power drain test, of those two 9V that happily gets charged.I started the testby having them in paralleland the calibrator was stably delivering 100mA output until the voltage dropped to 6.35V.Lower than that voltage the calibrator started to give lower output.Check the numbers and tell me what you think.9V starting voltage 100mA output.Minutes --- Voltage -- output current.3 .......7.506........7.248........7.099........7.0010.......6.9213.......6.6115.......6.35....100mA19.......6.02....80mA24.......5.81....62mA30.......5.65....50mAEnd..

author: Fraser
author_rank: Super Contributor
timestamp: August 04, 2011, 10:40:43 pm
content: An interesting review to read if you are interested in recharging alkaline batteries. The review is Ok but the comments at the bottom are more interesting to me.http://the-gadgeteer.com/2005/09/14/battery_xtender_alkaline_battery_recharger/It would appear that Duracell is not a brand that responds well to being recharged but others can tolerate it. I have had brand new Duracells leak whilst still in their box so can vouch for their seal fragility !

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 04, 2011, 11:47:59 pm
content: Thanks for the link Aurora.I did try to charge a Duracell but it was unable to deliver true power even fresh charged.Those CEGASA they stand up well , I got them charged for third time.And they happily hit 9.99V fully charged, but as the numbers show,they can not deliver even the nominal specs.Some one said on this link, that you can use them for low current applications,yes probably you can.If I manage to get 100mA from both of them for 15 minutes, they could do 10mA for 15 hours or 5mA for 30 Hours,or even more if your device works down to 5V.My general complain even from NiMH it is that I never get the nominal power in mAh .No name AAA 900mAh delivering 50mA , lasted 4 hours.Branded AAA 1100mAh lasted 6.5 hours before the cells drop below 1V. ( 50mA load too)What is on paper its does not delivered .. and I do not know what to believe any more.But I am willing to kill some alkaline to find out the truth.But currently I do not have one fully charged brand new 9V block, so to drain it and find out the truth.I have the 100mA standard load , and the timer watch, and the proper battery tester , those three does not lie.

author: IanB
author_rank: Super Contributor
timestamp: August 05, 2011, 12:04:55 am
content: According to the Energizer data sheet (http://data.energizer.com/PDFs/522.pdf), a 9 V alkaline battery will deliver about 500 mAh at a 100 mA load and about 600 mAh at a 25 mA load. Those little 9 V batteries are really not suited for high drain applications. They will give the best results if you keep the load below 10 mA.NiMHwillgive the nominal capacity in mAh, but only if they are quality batteries charged properly. There have been loads of crap NiMH out there that fall short. For an example of good NiMH I can reliably measure Eneloop AA cells at 1950 mAh and AAA cells at 800 mAh, both within spec.If you have any AAA cells that claim 1000 mAh, or AA cells that claim 2700 mAh, don't believe this. You will be lucky to get more than 900 mAh or 2500 mAh respectively. Those high capacity batteries are also fragile and will lose their performance after relatively few uses.

author: IanB
author_rank: Super Contributor
timestamp: August 05, 2011, 12:07:47 am
content: Here (http://data.energizer.com/PDFs/la522.pdf) is a 9 V battery that will do a little bit better than alkaline, but not much.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 05, 2011, 02:04:10 am
content: Well according to my eyes, because I am looking the diagrams at 6.5V as cut off voltage.At 100mA all those Alkaline they can do max three hours.And the latest Advanced Lithium 07:10 hh/mmThat's fantastic, please make it rechargeable .But now I have the feeling that Dave will pop in, by saying : That your dream must end here..because I just remembered something that he had said in the past, that those batteries,they do have the double power, but they cost three times more than a single Alkaline.If you plan to travel in the middle of nowhere, worth taking one just for the peace of the mind.Quote from: IanB on August 05, 2011, 12:04:55 amWould you share the testing method ?

author: IanB
author_rank: Super Contributor
timestamp: August 05, 2011, 02:51:07 am
content: Quote from: Kiriakos-GR on August 05, 2011, 02:04:10 amCertainly. Method #1 (the easiest) is this:http://www.mahaenergy.com/store/viewItem.asp?idProduct=423It is the Maha MH-C9000 WizardOne Charger-Analyzer. If you have any serious use for, or interest in, NiMH cells, then this is the baby you need to own. Sadly it only has slots for AA or AAA sizes, but if you are ingenious you can make adapters for C or D size cells. You might think it is a bit expensive, but by the time you have wasted your money on three $25 crap chargers you might as well have bought this one in the first place.Method #2 uses a logging multimeter, like this:http://www.candlepowerforums.com/vb/showthread.php?262602-Analyzing-batteries-on-a-budgetUsing method #2 I obtained very consistent results with the C9000 measurement. (But it's worth noting I made some effort to measure the resistance as accurately as I could. I didn't just use the resistance range on a DMM and trust it.)The Eneloop I tested there only gave 1830 mAh, but it was old. New Eneloops do much better. This is because NiMH cells degrade with time, and by the time they are five years old they will not perform as well as when they are new, even if they have only been sitting on a shelf.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 06, 2011, 02:55:06 am
content: Well I was expecting something more exotic than those two solutions.About the first I am not a believer of the true success of this item.About the second case, I think that I have read somewhere the Ohms law.I would be surprised if you had plan a circuitry that stabilizes the output of one AA 1.2V NiMH at 1V,and by the Ohms law ( one good enough resistor ) , we would had a stable load in mA ,all the way from 1.32V fully charged NiMH until to drop down to 1V.An old TV repair man would say : Oh that's easy add one Zener to drop the voltage down.Well personally because I hang out in a place full of Electronic Engineers , I would expect that they will had a bit more imagination,than the TV repair man.Thanks for the links.

author: IanB
author_rank: Super Contributor
timestamp: August 06, 2011, 03:49:05 am
content: Oh, sure, I could have concocted a constant current circuit with an automatic cut-off at 1 V, with a microcontroller for automatic logging of the current, but that would not be good engineering.One of my old lecturers at university used to say that an engineer is someone who can make for a penny what any fool could make for a pound. Exotic is not always the sign of good engineering, especially if by good design you can get the same result by simpler and cheaper means.You might have heard of Ohms law, but you would be amazed how many people do not understand how to use itBy the way, I have tested my Maha C9000 rather a lot, and in my opinion it is a properly engineered product that works as you can expect it to work. It is as close to being a laboratory measurement tool as you could hope to get for consumer money. The next step up would cost you 10x as much, $1000's even.

author: Ecki_Meerschweinchen
author_rank: Newbie
timestamp: April 07, 2024, 06:18:18 am
content: I read this forum yesterday and tried out a bit since. From my experience, blue Aerocell batteries (9V and 1,5V) are indeed pretty rechargeable. Though the 9V drops by about 2V after like 20 hours.The chemistry type is not written onto the battery and I didn't find out anything in the internet so far, but it seems not to be alkaline, because Aerocell's alkaline are typically read. The 9 Vblock says "6LR61", the 1,5V simply says "LR6". As you've written before, LR61 types seem pretty rechargeable. These 1,5Vs are better though.Note that I use simple chargers where you can either plug in 2 or 4 batteries at once or 1 or 2 9V blocks. These seem to be a simple construction, so the battery doesn’t need to "fool" the charger into thinking it's a rechargable one. They just charge them. Btw the 9V blocks are charged with around 40mA and it didn't cause any leakage problems or something. The AAs are charged with 200mA and the AAAs with 100mA. I didn't have any Aerocell AAAs though.

author: Ecki_Meerschweinchen
author_rank: Newbie
timestamp: April 07, 2024, 08:09:48 am
content: I just looked and found a package of AAA Aerocells at home. They are type LR03 and are sold by Lidl. The chemistry is still unknown.The LR6 I just took out of the charger have around 1.9V, while the ones I charged yesterday seem to be relatively stable at around 1.48V.

author: Psi
author_rank: Super Contributor
timestamp: April 07, 2024, 08:40:15 am
content: Quote from: Richard W. on August 01, 2011, 06:38:54 pm+1 to this. If you recharge them don't leave them in a quality instrument.It's only only worthwhile doing once, maybe twice and in low current devices.Much better plan to just buy a rechargeable.

author: tooki
author_rank: Super Contributor
timestamp: April 07, 2024, 11:29:19 am
content: Quote from: Ecki_Meerschweinchen on April 07, 2024, 08:09:48 amThey say “alkaline” right on the package, on the back.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: April 07, 2024, 10:01:37 pm
content: Quote from: IanB on August 01, 2011, 05:00:45 pmHave you ever tried to un-fry an egg and put it back in it's shell?Scrape of old paint, put it back in a can for re-use later?

author: Harrow
author_rank: Regular Contributor
timestamp: April 08, 2024, 12:04:57 am
content: I often recharge the AAA alkaline batteries in my remote controls. At the very least, it works until you remember to buy replacements.