RMSK, Inc.        
Page 1 of 3 123 LastLast
Results 1 to 30 of 68

Thread: Are your old Eneloops still going strong? - a survey.

  1. #1

    Popcorn Are your old Eneloops still going strong? - a survey.

    Hello everybody,
    just curious to know. The very first Eneloops to see the world were introduced in Nov 2005, which took place in Japan. Shortly after, in spring 2006, they were distributed world-wide and by Nov 2011 have reached their 200,000th sale and this is being celebrated by the November 2011 Japan release of the Eneloop Tones Chocolat. In spring 2012, the Chocolat Eneloops and the white standard Eneloops will hit international release as HR-3UTGB and HR-4UTGB for the 3rd generation Eneloop AA and AAA cells.

    So, the oldest Eneloops anyone could possibly own are exactly 6.0yrs old (and those cells bear the model number HR-3UTG and HR-4UTG)!

    Survey: How old are yours, how intense have you use been using them, and what is your estimated degree of cell quality degradation ("aging")? -- Users with hobby chargers, Powerex C9000, or the cloned/rebranded BC-700 (BC-900, BC-1000, etc.) could tell exactly what the mAh-capacities of their Eneloops are after all these months and years of high-power Cree LED flashlight abuse

    Thanks in advance for some rambling on your Eneloops
    Last edited by shelm; 01-06-2012 at 10:58 AM.

  2. #2
    Silver Moderator
    SilverFox's Avatar
    Join Date
    Jan 2003
    Location
    Bellingham WA
    Posts
    12,329

    Default Re: Are your old Eneloops still going strong? - a survey.

    Hello Shelm,

    Welcome to CPF.

    I am still using a lot of the original 2006 Eneloops and they are still going strong. I believe I still have an unopened pack and I should see if I can find time to run some tests on those cells.

    Tom
    Behind every Great man there's always a woman rolling her eyes...

    Most batteries don't die - they are tortured to near death, then murdered...

  3. #3

    Default Re: Are your old Eneloops still going strong? - a survey.

    My Eneloops are 4 years old. I use them in my Nitecore D10 and a Fenix L01 I believe, as it's my wife's EDC and I never see it anymore.
    I also use them for a lot of stuff around the house. I don't use them in anything where they might get tossed out or in my remote controls.
    They have held up really well. I will be buying 16 of the newer ones next month.
    I recharge them with a Lacross BC-900 which is also 4 years old.

  4. #4
    Flashaholic* uk_caver's Avatar
    Join Date
    Feb 2007
    Location
    Central UK
    Posts
    1,381

    Default Re: Are your old Eneloops still going strong? - a survey.

    I've been using a decent number of Eneloops since shortly after they came out, and I haven't had any cell-related problems (apart from a couple of AAAs that eventually got killed (presumably by unfriendly charging) in a cordless phone handset, which I don't think counts as an Eneloop issue since it has happened with other cells as well.

    My expectation is that most of my cells will be going strong for many more years, which is more than I could say for the various >=2300mAh NiMH cells I have had (and ended up trashing) over time, and that I'm probably more likely to lose Eneloops (or have them 'borrowed') than actually wear them out.

  5. #5
    Flashaholic Glock27's Avatar
    Join Date
    Dec 2008
    Location
    Central Missouri
    Posts
    467

    Default Re: Are your old Eneloops still going strong? - a survey.

    My oldest Eneloops are from February of 08. I bought a Maha C9000 charger at the same time. All my Eneloops and Sanyo 2700's are still going strong!
    Good cells AND good charger = great results.

    G27

  6. #6
    Flashaholic Aquanaut's Avatar
    Join Date
    Aug 2010
    Location
    New York
    Posts
    158

    Default Re: Are your old Eneloops still going strong? - a survey.

    Only slightly off topic, but I bought my Imedion 2100 mAh batteries on 12/17/07 and recently discharged them on a C9000 @ 500 ma. They had capacities of 2019, 2024, 2032, and 2012 mAh.

    First I did a discharge/charge at 240/500 ma on a Maha C204F and the batteries were luke warm to the touch. Then I did the capacity test on the C9000 the next day.

    I believe that it was Mr. Happy who said that it is good to warm up the batteries during charging to redistribute the electrolyte. I believe in this observation. Charging on the C9000 does not warm up the batteries.
    SciFi survival tip #7: If a giant spider catches you don't panic. It won't eat you for days.
    SciFi survival tip #61: If every animal runs in the same direction, follow them.

  7. #7
    Enlightened
    Join Date
    Jan 2012
    Location
    Southern California
    Posts
    64

    Default Re: Are your old Eneloops still going strong? - a survey.

    Great to know that eneloops have stood the test of time! Great product.

  8. #8
    Enlightened
    Join Date
    Sep 2003
    Location
    Big Apple
    Posts
    36

    Default Re: Are your old Eneloops still going strong? - a survey.

    All but 3 of my original purchase of 40 are still going strong. They still test out at over 1850 mah on the C9000 and still do very well on the CBA. These were all purchased in 2006. Quite impressive product.
    My Lights: Surefire El1, L4, L7(2), Inova T3, Goldston 7W, UK HID, Kumkang HID (original), Maglight 3D

  9. #9
    Flashaholic* Wrend's Avatar
    Join Date
    Oct 2010
    Location
    United States, IL
    Posts
    654

    Default Re: Are your old Eneloops still going strong? - a survey.

    My oldest Eneloops are the first generation ones from about two and a half years ago. They've had a pretty low cycle life so far (probably somewhere around 50 cycles, or so), but have gotten rather toasty on "dumb" chargers, and have been subjected to 5 amp drain rates a few times.

    The last time I tested them a couple of months ago on my C9000, they're 1.1% lower in capacity on average than the average of new Eneloop cells.

  10. #10

    Default Re: Are your old Eneloops still going strong? - a survey.

    I've a bunch of the old HR-3UTG eneloops that I've used multiple times to power Nikon SB-800 flashes, various flashlights and other devices and they just keep on going and going and going. Love these things!
    (I Charge them with a Maha MH-801D)

  11. #11
    Flashaholic
    Join Date
    Feb 2006
    Location
    Central Texas
    Posts
    286

    Default Re: Are your old Eneloops still going strong? - a survey.

    I have four that I purchased in '07 and 4 that I purchased in '08. I don't have the tools to measure capacity, but they are all performing well in my flashlights and digital camera. Still very low self discharge rate. The only problem I've had with them is the wrapper has become slightly soft and tacky and is starting to peel. A bit like a sunburn peel.

    All the Energizer and Powerizer non LSD batts I had in '06 and '07 have failed one way or the other and were sent to the recycle bin a couple of years ago.

  12. #12
    Flashaholic
    Join Date
    Jul 2007
    Location
    Central PA
    Posts
    158

    Default Re: Are your old Eneloops still going strong? - a survey.

    I'm going through a checking and thinning if my AA batts, many of which have been severely neglected, abused, and otherwise not treated right. Last time I ran many of them through the Maha C9000 was 2007. Some have been cooked on the 15 minute Energizer, 1 hour Ray O Vac or left to charge in a 25ma dumb charger for weeks at a time.

    The Eneloops that have an 06 date code seem to be doing the best:

    Battery Capacity %
    Eneloop AA #2 2001 100.05%
    Eneloop AA #3 1900 95.00%
    Eneloop AA #4 2019 100.95%

    I've got about 4 more to cycle through the C9000.

    Have recycled a bunch of Tenergy 2600 Mahs that show either "HIGH" or low (less than 40%) capacity, a couple Duracell 2300s, as well as an Energizer 1800 here and there.

  13. #13
    Flashaholic
    Join Date
    Oct 2011
    Location
    S.E. Michigan
    Posts
    265

    Default Re: Are your old Eneloops still going strong? - a survey.

    2 months ago i opened a couple packs that were at least 3 yrs old (they were supposed to be the latest). I bought 4 packs and 2 were the latest and 2 were old stock which i started 2 send back but decided 2 avoid the hassle and the old ones still had 75% charge thus confirming these do indeed hold their charge after 3 or more years and are working like new! Great product that delivers as stated.

    Keith

  14. #14
    Flashaholic* Wrend's Avatar
    Join Date
    Oct 2010
    Location
    United States, IL
    Posts
    654

    Default Re: Are your old Eneloops still going strong? - a survey.

    ...the old ones still had 75% charge...
    That's impressive. They leave the factory 75% charged.

  15. #15
    Flashaholic
    Join Date
    Mar 2008
    Location
    Philippines
    Posts
    120

    Default Re: Are your old Eneloops still going strong? - a survey.

    Those readings are odd, my 1st set of 4 eneloops which I got around August of 2006 are showing 1550mah to 1500mah in capacity according to the C9000 and one displays High. Well they have been abused like draining them down in lights on high till no light would be produced, no refresh every couple of months. I know that they were recharged twice to three times a week at some point so that might be a big factor. They have served me well over the years and have maybe close to 250-300 cycles on them so I can't complain. They still hold their charge well too and have been moved to my "reserve force".

  16. #16
    Flashaholic*
    Join Date
    May 2008
    Location
    Kentucky
    Posts
    724

    Default Re: Are your old Eneloops still going strong? - a survey.

    I Had A Set Of 8 from Around 2007. Unfortunately i Had To Throw The Majority Of Them Away Because The Anodes And Cathodes Were Dented In Pretty Badly. I Didnt Have Any Problems With Capacity Or With Them Holding A Charge However.

  17. #17
    Flashaholic*
    Join Date
    Oct 2003
    Location
    Two Rivers, Wisconsin
    Posts
    3,832

    Default Re: Are your old Eneloops still going strong? - a survey.

    My batch of 30 AA & AAA Duraloops from 2008 are embossed with 7004 + letters, so I'll assume they're from 2007. All still indicate about 1900mAh & 800mAh, respectively, at 500mA & 250mA load on a BC-900. I charge them at 1000mA & 500ma and try rotating so they get used. Even those left in little used devices for one year had about 80 - 90% capacity left.

    I've also a batch embossed with 9k21-ur & 9h11-eh, which I'll guess are from '09 and purchased in 2010. All are good.

    It's interesting that out of 50 "surplus" 1200mAh NiMh cells from Singapore, purchased in 2001, half of them still work and have about 800mAh capacity remaining. They still have fair storage life, but suffer reduced voltage (1.15 -1.20v) under 500mA load. I paid only 50 cents each and didn't have a smart charger until 2005. These have been abused.
    I'm absolutely certain that I need another flashlight.

  18. #18
    Flashaholic* jasonck08's Avatar
    Join Date
    Sep 2007
    Location
    Redding, CA
    Posts
    1,516

    Default Re: Are your old Eneloops still going strong? - a survey.

    Yes, my oldest ones are from 2007 or 2008 and they still provide about 1900mAh. However, I had one cell that somehow managed to discharge itself to 0.01v and now its not performing quite as well, even after a few cycles. But no big deal its only one cell.

  19. #19

    Default Re: Are your old Eneloops still going strong? - a survey.

    My oldest ones are from 2007 and are still going strong.

    Off topic, my oldest GP Recyko are also from 2007 and are also going strong.

  20. #20
    Flashaholic* Derek Dean's Avatar
    Join Date
    Nov 2006
    Location
    Monterey, CA
    Posts
    2,204

    Default Re: Are your old Eneloops still going strong? - a survey.

    I've got four HR-3UTG AA cells, and four HR-4UTG AAA cells, all from that first batch in either late 2006 or early 2007, along with the Sanyo NC-MDR02NU two bay charger that I've used to charge them. They all still work fine and have been used more or less continuously this entire time, in my Fenix LD2 (which is my bicycle commute light) and in various keyring and pocket lights.

    I have followed the directions I got from Battery University and have fully discharged the cells once or twice a year (to reform them), while topping them off once every two or three weeks the rest of the time (just the ones that are getting used).

    Talk about a product that has FULLY lived up to and surpassed my expectations! Way to go Sanyo!

  21. #21
    Flashaholic illumiGeek's Avatar
    Join Date
    Oct 2003
    Location
    Kapolei, Hawaii
    Posts
    499

    Default Re: Are your old Eneloops still going strong? - a survey.

    Quote Originally Posted by itguy07 View Post
    ...The Eneloops that have an 06 date code seem to be doing the best...
    They have a date code? I guess it's like the horse said, you learn something new every day.

    I have a bunch of older style Eneloops, and I tried testing them once to see if I could sort the older ones from the newer ones, but they all tested within a few percent of each other, in spite of some being almost new, and others several years old. After reading about a date code in the post above, I took a look at my white Eneloops, but still did not find anything? So I went to the great oracle of wisdom (google) and found the codes. Dayum it's hard to see (then again, I'm quite far sighted).

    Anyway, to make a short story long...

    With the help of my trusty Fenix L1T V2 R2 (and some strong reading glasses), so far I have found:

    8 from 2006 (06 07TA)
    8 from 2007 (07 08TL) ** The 07s are really hard to read!
    8 from 2008 (08 08ER)

    So that's 24, from 3 successive years. Probably have more somewhere (I have way too much battery powered crap, lol!). I just popped 4 of the the 2006 cells into my BC900 for testing. We'll see if they still test like new. Many of these have been cycled hundreds of times, and most have been in high drain hotwire mods and diving lights (often sucked dry). They've usually been charged on my LaCrosse BC900 or Maha MH-C9000 & MH-C801D. A few have been run through an Eveready 15 minute battery cooker, but not very often.

    The only Eneloops I have that I know have lost some capacity were the "Duraloops" that were in my LaCrosse BC9009 when it went into melt-down mode. But even though they got too hot to touch, they still work to this day, and last I tested them they had around 1650-1700mA capacity. Three of those are in my PS3 Sixaxis controller (which I use with my PSPgo now), and I don't recall where the 4th one went (probably in a clock).

    I wonder how old the rest of my Duraloops are? I've got quite a few of those as well. And I've also got a bunch of the newer 1500 cycle 'loops.

    Anyway... I'll test my 2006 cells and report back.

    EDIT: First test pass complete!

    LaCrosse BC900 (v35): Charge/Test mode (1000mAh charge, 500mAh discharge)
    Eneloop AA cells from 2006 (06 07TA)

    1=2060
    2=2050
    3=2040
    4=2030
    5=2020
    6=2000
    7=1651 *
    8=1590 *

    Not bad results! Six out of eight 5.5 year old batteries still testing at or above their new factory specifications. The last 2 cells tested below spec so I am running a break in cycle on my C9000 and then I'll re-test. UPDATE: re-sorted by capacity, and break in still running on low cells (really slow process).
    Last edited by illumiGeek; 01-19-2012 at 06:15 AM. Reason: update/edit info
    I'm having amnesia and deja-vu at the same time... I think I've forgotten this before?

  22. #22
    Flashaholic illumiGeek's Avatar
    Join Date
    Oct 2003
    Location
    Kapolei, Hawaii
    Posts
    499

    Default Re: Are your old Eneloops still going strong? - a survey.

    Okay, final verdict. Several attempts to resurrect those weak cells failed. Ran refresh cycles on both the Maha C9000 and LaCrosse BC900, and also tried a break in cycle on the C9000. Final test pass on the BC900 showed their capacity at 1702 & 1572. So it appears that 2 out of 8 of my 5.5+ year old Eneloops are showing their age. However, 6 still test over 2000mAh capacity, which is within the specifications for new cells (1900 minimum, 2000 typical).
    I'm having amnesia and deja-vu at the same time... I think I've forgotten this before?

  23. #23

    Default Re: Are your old Eneloops still going strong? - a survey.

    Quote Originally Posted by illumiGeek View Post
    BC900 showed their capacity at 1702 & 1572
    So what does this mean in practice, what's the advice here?

    ( should we dispose the two cells?, or would it be waste to do so? )

  24. #24
    Silver Moderator
    SilverFox's Avatar
    Join Date
    Jan 2003
    Location
    Bellingham WA
    Posts
    12,329

    Default Re: Are your old Eneloops still going strong? - a survey.

    Hello Shelm,

    I generally retire cells when they fall below 80% of their initial value.

    Eneloop cells start off at around 1900 mAh. 80% of that is 1520 mAh.

    Tom
    Behind every Great man there's always a woman rolling her eyes...

    Most batteries don't die - they are tortured to near death, then murdered...

  25. #25

    Default Re: Are your old Eneloops still going strong? - a survey.

    Good rule of thumb, thanks!
    If we take normal care of our Eneloops (e.g. topping off the unused cells on the 1st of every month, i.e. 12x per year; and a break-in with these unused cells 1x per year), they should not be aging until years later, am i right?

    That's the whole purpose of buying Eneloops (=top quality cells)

  26. #26
    Flashaholic
    Join Date
    Oct 2006
    Location
    Somewhere west of where you are
    Posts
    169

    Default Re: Are your old Eneloops still going strong? - a survey.

    Quote Originally Posted by uk_caver View Post
    a couple of AAAs that eventually got killed, presumably by unfriendly charging in a cordless phone handset, which I don't think counts as an Eneloop issue since it has happened with other cells as well.
    Interesting - my only bad Eneloop cell was in a homemade pack for a cordless phone. My big Eneloop torture test is a set of Duraloops in a two-way radio battery that is used 5 days a week since last February and charged at 0.5C every night - so far, no loss in runtime.
    It ain't easy being me, but someone's gotta do it.

  27. #27
    Flashaholic illumiGeek's Avatar
    Join Date
    Oct 2003
    Location
    Kapolei, Hawaii
    Posts
    499

    Default Re: Are your old Eneloops still going strong? - a survey.

    Quote Originally Posted by shelm View Post
    So what does this mean in practice, what's the advice here?

    ( should we dispose the two cells?, or would it be waste to do so? )
    I hang on to cells that still have usable capacity. Those 2 will probably go into things that don't need much current (clock, mouse, keyboard, etc.).

    Quote Originally Posted by shelm View Post
    Good rule of thumb, thanks!
    If we take normal care of our Eneloops (e.g. topping off the unused cells on the 1st of every month, i.e. 12x per year; and a break-in with these unused cells 1x per year), they should not be aging until years later, am i right?

    That's the whole purpose of buying Eneloops (=top quality cells)
    Why bother "topping off" LSD cells? The "whole purpose of buying Eneloops" is that they don't need to be topped off.
    I'm having amnesia and deja-vu at the same time... I think I've forgotten this before?

  28. #28
    Flashaholic
    Join Date
    Apr 2006
    Location
    England, UK
    Posts
    191

    Default Re: Are your old Eneloops still going strong? - a survey.

    Quote Originally Posted by illumiGeek View Post
    I hang on to cells that still have usable capacity. Those 2 will probably go into things that don't need much current (clock, mouse, keyboard, etc.).


    Why bother "topping off" LSD cells? The "whole purpose of buying Eneloops" is that they don't need to be topped off.
    Because they aren't zero self discharge cells?

    Personally, I top up my 'standby stash' after between 3-6 months depending on the brand of LSD cells.
    Last edited by Trancersteve; 01-23-2012 at 05:43 PM.

  29. #29
    Flashaholic* Wrend's Avatar
    Join Date
    Oct 2010
    Location
    United States, IL
    Posts
    654

    Default Re: Are your old Eneloops still going strong? - a survey.

    I don't bother topping of my Eneloop cells once they're off the charger. They self discharge so slowly that it isn't worth the effort for an insignificant amount of longer run time, and perhaps even more importantly, I match all my cells and only use them in series cell sets that get charged and used at the same time in the same devices together, so they remain equally charged as each other and wear evenly.

    The self discharge rate of Eneloops decelerates over time, so they lose a higher percentage of capacity initially. So the difference in charged capacity from 0 to 3 months is going to be greater than from 3 to 6 months, and from 0 to 1 year than 1 to 2 years.

    The main reason to top off cells (on an independent port charger) would be if you don't know how fully charged they are compared to each other. This would probably add less wear on the cells than using ones together that don't have the same amount of charged capacity.

    To keep your cells in top performance (again, not really an issue for me) a slow discharge followed by a full charge would probably be even better, though it may add some wear to the cells.
    Last edited by Wrend; 01-23-2012 at 07:28 PM.

  30. #30
    Flashaholic illumiGeek's Avatar
    Join Date
    Oct 2003
    Location
    Kapolei, Hawaii
    Posts
    499

    Default Re: Are your old Eneloops still going strong? - a survey.

    Quote Originally Posted by Trancersteve View Post
    Because they aren't zero self discharge cells?
    No, but their discharge rate is so slow that topping off frequently makes no sense. You gain what, an extra 100mA? Unless you have reserve Eneloops that are never being used -- in which case I'd suggest you rotate your cells -- or at most, top off once a year (anything more frequent than that is just a waste of time and energy, and probably causes pointless wear on the cells).

    I rotate cells. When I pop spent cells onto a charger, I take some out of my charged reserve to replace them. As cells come fresh off the charger I put them into the reserve case upside down from the others, so that I can tell which need to get used next. Once the whole case is flipped I turn them all over and repeat. I also always pull from right to left which helps to keep things pretty even.

    The 2 cells I have that are weak were in my Bluetooth mouse, which is charged on a cradle that has a series "dumb" charger. I didn't rotate those since the mouse had its own charger, but in retrospect, maybe I should have? Then again, they did last over 5 years, even with the abuse.

    Quote Originally Posted by Wrend View Post
    I don't bother topping of my Eneloop cells once they're off the charger. They self discharge so slowly that it isn't worth the effort for an insignificant amount of longer run time
    Agreed!

    Quote Originally Posted by Wrend View Post
    ...and perhaps even more importantly, I match all my cells and only use them in series cell sets that get charged and used at the same time in the same devices together, so they remain equally charged as each other and wear evenly.
    I don't even bother with that. Look at my test figures above. Not counting the 2 cells from the mouse (which weren't in rotation) the difference is only 3% from the best to the worst. That's probably close enough to be considered margin of error. It's certainly close enough that I don't worry about balancing. When I tested all 24 of my Classic (Retro?) Eneloops a couple of years ago the difference was less than 100mA (<5%).

    Quote Originally Posted by Wrend View Post
    The main reason to top off cells (on an independent port charger) would be if you don't know how fully charged they are compared to each other. This would probably add less wear on the cells than using ones together that don't have the same amount of charged capacity.
    I do that before filling my two 8 cell HID dive lights, but that's because I usually don't have 16 cells in my charged reserve and have to pull cells from other devices.

    Currently I have 11 'loops in my charged reserve, and 47 in use in various devices. That's a total of 58 Eneloops. 24 "Classic" + 8 "Duraloop" + 26 "1500" types (and that's just the AA size).

    Is that a lot?
    I'm having amnesia and deja-vu at the same time... I think I've forgotten this before?

Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •