Look what I found in the recycle bin

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dchomak
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Just to keep it real, I thought I would post a couple of failures.
Today I found these 3 packs. 2 old discontinued Ryobi 24V packs and a new Echo 58V pack.

Turns out the Ryobi on the right had been through some sort of catastrophe and had melted parts inside. All cells were zero and there is evidence at the terminals of what happened on top of the pack.
The other Ryobi looks like it was used just a couple of times and it is on my charger waiting to be tested.

The 58V Echo is definitely brand new, never used.
ImA4 had already found one of the Echos, he said it looked new and it seems that the cells are in perfect condition, He found a 4A pack that contained 28 2A cells. I found the 2A version and it only had 14 cells. My pack looked brand new, but all cells were at zero. All I could do is strip the pack of its’ cells to get at the only thing left of use to me.
Cell holders!




And after a lot of work stripping everything out, I ended up with this. Enough to hold 56 cells!

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Quote:
And after a lot of work stripping everything out, I ended up with this. Enough to hold 56 cells!

If you need a thing to store batteries in can’t you just drill some holes in a piece of wood?

.

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greenlight wrote:
Quote:
And after a lot of work stripping everything out, I ended up with this. Enough to hold 56 cells!

If you need a thing to store batteries in can’t you just drill some holes in a piece of wood?

Sure you “could”…. but where’s the fun in that. LOL …. SillySmile

Plus, and this would be very unlikely; though not impossible: wood might contain just enough moisture to make the part of the battery contacting it do “funny things”. Wink

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^
Agreed. Breaking down power tool packs is dangerous and fun enough to be addicting. Plus, there are usually nice quality components in them for folks that tinker with SMD electronics.

As dcho said, I was fortunate enough to get one of those packs with 28 like new cells. I can testify that the cell holders are very nice quality. Really holds the cells nicely with just the right amount of pressure. I liked mine so much that I ground off the tabs that stick out to the sides. They have been designated to hold my best high drain cells.

dchomak
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greenlight wrote:
If you need a thing to store batteries in can’t you just drill some holes in a piece of wood?

When I first saw your idea I thought it was a good one. Actually if I was into woodworking I would probably have had done that already.

“When you’re handed a bunch of lemons, make lemonaide”

When I realized all of those cells were dead, that’s what I did. Also there is something poetic about using a cell holder for….
a cell holder. Smile

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Boaz wrote:
IMHO if you’ve not torn down 10 or 15 recycle bin battery packs you’re not really hardcore BLF .

BLF-noob here; will have to remember this. Big Smile

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

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garrybunk wrote:
BTW – the one time I wanted to pull items from the recycle bin I tried to play things “the polite & proper way” by asking the associate if I could take the items. He had to call over a manager and they had to consult “policy”. They couldn’t figure anything out! They had no idea who actually “owns” the batteries or bin, whether or not HD gets money for those batteries when they are picked up, etc. . . It was rather absurd. They finally let me take the batteries saying, “well you can this time, but . . .”.

I used to hit the neighborhood CVSes, Duane Reades, etc., anyplace that sold disposable cameras, and ask for those with flashes. When pressed, I’d say I was teaching a basic-electronics course, and wanted to give the students a circuit (the flash) that was pretty simple, yet interesting, to dissect.

Mostly worked. Some people (usually younger girls who couldn’t care less, as it wasn’t their property) would cheerfully fish out a dozen or two, load ‘em up into shopping bags, and send me on my way. The younger guys would be all like, “Naw, you gotta talk to my manager, I don’t wanna get in trouble”. The managers would be the ones who would give me a hard time, saying the store gets “rebates” or somesuch, which I kinda doubted.

So there was more’n one reason to go when the teenyboppers were there. Big Smile

Nice, though. Flashtube, HV circuit, HV cap, and a lightly-used AA, in each one. Plus various gears, optics, etc., to play with. Don’t think I had to buy an AA cell in years…

And parallelled caps when charged up make a nifty spot-welder! Clear “whiskers” from worn NiCd cells. Etc.

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

dchomak
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I forgot to report back on the condition of the purple celled “hoverboard” pack.
I charged the pack up and drained it into 2 – 3 ohm power resisters in series. After doing this I estimated that pack to have a capacity of “4108 mAh” or about the rated 4Ah. It could be that it is a brand new pack. Maybe thrown in the bin by someone who just didn’t want to risk using a hoverboard after seeing them in the news.
Apart from the wimpy weld joints, the pack seems to be well made. The included Chinese cells seem to perform well, how safe those individual cells are on there own is unknown.

Also of the last 3 packs I reported on here,

The pack on the left, a Ryobi 24V pack, charged up and is working perfrectly. It looks as though it is very lightly used and originally was rated at 2.6Ah. I tested it and estimate that this pack is good for 2.4Ah. My theory on this one is that the person that owned it threw it away because the tool it goes to broke. Ryobi has discontinued their 24V line, so that person had no other options other than ditch it.
I have a working 24V Ryobi weed wacker and can put this pack to good use Smile

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Holy cow, guys. I gotta learn how to scrounge for and correctly take apart these battery packs, because these are gold mines for 18650 cells!

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Regularly coming across big packs these days.  I got excited when I pulled the 56v pack on the right.  Ended up only having 14 Sanyo UR18650RX's at 3.67 - 3.68v.  This is the second big pack I have found that was labeled at a voltage greater than nominal voltage.  In the past, such a pack would be labeled 50v.

Very well built pack.  2Ah cells dated S37 (September 2014).  Haven't tested yet, but the pack looks unused.  No dust, dirt, or scratches to be found, even in the corners and contacts.  Maybe it was a display model being disposed of by the store.  Maybe HD is closing out a product or product line.

EDIT: Content added.

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that brown glue might be the cause of self discharge.
that curse has been known over 40 years.a built in failure point.
peeling a bunch out of a uniden hr2510 right now….

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snakebite wrote:
that brown glue might be the cause of self discharge. that curse has been known over 40 years.a built in failure point. peeling a bunch out of a uniden hr2510 right now....

?  Are you responding to the post above your post?

No brown glue and I don't think there has been any self discharge.  It appears the pack was never used or charged.  Every cell is sitting at a nice storage charge.  I think HD is clearancing a product or product line and this pack probably belonged to a product that was put on display without the pack in it.

dchomak
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Dabnabbit!

ImA4, you beat me by just hours to this pack Tired

But the good news is mine is the 4Ah version. If yours contains 14 cells, mine should contain 28.
But the bad news is I don’t have much hope for the condition of mine, it looks like it has seen some rough service, perhaps even some abuse.

Before I open it up I measure 36V across the output terminals. 36V/14 equals on average 2.57V per cell. If all cells are 2.57V then I would hope this pack is just fully discharged. That wouldn’t necessarily be bad, and the fact the test button blinks red rapidly could mean it IS fully discharged. Well, at least it blinks Silly I’ll know more when I take it apart.

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^

I bet you pulled it from an HD bin, right?

If you have the same cells, I think they are rated for down to 2.5v (IIRC).  Looking forward to hearing what you find.  I wish I hadn't tore mine down now.  It has all the balancing circuitry (tons of wires) self contained.

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ImA4Wheelr wrote:
I bet you pulled it from an HD bin, right?

Yep, probably same as you!
ImA4Wheelr wrote:
I wish I hadn’t tore mine down now. It has all the balancing circuitry (tons of wires) self contained.

I had that same feeling after I tore down that “Anton Baur” Pack in Post 137 of this thread

Bad news and Good news.
The bad news is this pack is toast!


The good news is that seems that only a few of the cells are shot. It’s looking more and more like a new pack that got wet, maybe even while still at Home Depot. I have taken voltage readings on a number of cells and they either read 0.0V or 3.6V. That could be a new pack that got wet. After cleaning up the top of the battery case where it mates with the tool, I don’t see any wear on the slides.

It looks like only the bottom first inch of this battery got wet, as though it was sitting on the floor and water pooled underneath it. To me it seems that if each cell that went bad shorted thru itself, the circuitry of the pack could have been undamaged.
I am inclined to not mess with it, just harvest the good cells and be done with it. I am charging a 4Ah cell-pair with my OPUS right now. It will take the rest of the day to know what the results, capacity wise, are.

EDIT:
I just realized that if the bottom 8 cells are dead, that would leave 28 – 8 or 20 cells good. That would be 10 cell pairs in series. The 36V I measured at the external connectors before I opened it up divided by 10 equals the 3.6V that I measure across each good cell.
More proof this could very well be a new pack that got wet!

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^

Your analysis makes sense.  When I saw your pics and report, I figured someone swapped their used pack for a display pack.  Then the swapped pack was recycled when the product was pulled off the floor.  Your reasoning seems more plausible.  It also explains how new the wrappers look in the bottom cells in your pics.  20 maybe like new 22 continuous amp UR18650RX's.  I'm rooting for you/them.  Mine will remain untested until I need them.  For now, they continue to be kept in a storage state.

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“4079”
That’s the number OPUS reported back to me when I discharged one of the cell-pairs. I could only discharge at a maximum of 1A. That would be 500mA from each cell, not a very high draw at all. But even so, I think it sort of confirms the undamaged cells will be in like new condition.
When and if I ever get around to removing the good ones, I will then be able to check the internal resistance.

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I found 3 of these in the recycle bin yesterday. They are NiMH packs, 1 is rated at 9.6V and 1050mAh, the other 2 are rated at 7.2V and 1800 mAh. What caught my eye and the reason I pulled them was “MAHA” I know that name from my MAHA charger. Just had to explore and see what was inside of these.


Turns out the 9.6V pack had what measures out at 8 – 16270’s. Is there such a cell?
The 7.2V packs contain 6 – 16420’s?


I am testing the cells now. If they have decent capacity, they could be useful, size wise, some day.

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just give it a coat of poly finish.
that is after you sand it smooth,stain it,ect.
dont want out battery storage/display rack to be ghetto LOL.

teacher][quote=greenlight][quote wrote:

Plus, and this would be very unlikely; though not impossible: wood might contain just enough moisture to make the part of the battery contacting it do “funny things”. Wink

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short ones are 2/3a
long are 4/5a
i would have tested the packs whole.
those are for yaesu ht’s.

dchomak wrote:
I found 3 of these in the recycle bin yesterday. They are NiMH packs, 1 is rated at 9.6V and 1050mAh, the other 2 are rated at 7.2V and 1800 mAh. What caught my eye and the reason I pulled them was “MAHA” I know that name from my MAHA charger. Just had to explore and see what was inside of these.


Turns out the 9.6V pack had what measures out at 8 – 16270’s. Is there such a cell?
The 7.2V packs contain 6 – 16420’s?


I am testing the cells now. If they have decent capacity, they could be useful, size wise, some day.
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snakebite]just give it a coat of poly finish.
that is after you sand it smooth,stain it,ect.
dont want out battery storage/display rack to be ghetto LOL.
[quote=teacher][quote=greenlight
wrote:
Quote:

Plus, and this would be very unlikely; though not impossible: wood might contain just enough moisture to make the part of the battery contacting it do “funny things”. Wink

Thumbs Up
Your right ‘snakebite’, that would take care of my “unlikely” scenario taking place.
And with your other suggestions, “un-ghetto” it also…………. Big Smile

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I find all kinds of interesting and unusual stuff in the bins.
Here is something that is neither unusual or perhaps interesting. But it was interesting to me.

What we have here is 8 – AA NiMH cells. What was interesting to me was their physical condition, they looked fairly new. Also I recognized the 6 Duracells as the Chinese LSD types.
Why did someone throw them away? THAT’s what was interesting to me, and I was curious to find out why.
Also, what kind of person throws away cells in a nice new “ZipLock” bag Smile
Both kinds of cells were made in China, however I have much higher expectations for the DuraCells.

I have some of those very same cells in my stock, I also have some of the better “DuraLoops” that are made in
Japan. Here are both, the China DuraCells can be recognized by the black top while the Japanese “DuraLoops” have a white top. If you look closely at this picture you can see Made in Japan on the white top and Made in China on the black top. Remember, I found 6 of the Chinese black tops in the bin.

So what I did was number each cell and popped them into may OPUS to see where each cell sat.

Of the first 4 DuraCells it looks like 3 are in a good state of charge, while cell number 3 looks damaged.

At this point I took them out and popped the other 4 in.

Cell number 5 is looking good while the other 3, not so good.

At this point I thought perhaps cradle number 3 of my charger was bad as both sets of cells read NULL in position 3. I tested those cells on other slots and confirmed it was the cell itself, not the charger.

I am in the process of testing each of these cells for capacity. Here are the results of the first batch of 4.
These cells are of the LSD type and are rated at 2000 mAh and test close enough to that number to be called “like new” Smile

I also capacity tested the other 4, and only cell #5 tested at full capacity, around 2000 mAh.
So as of right now, 4 of the 8 cells tested as “like new” while the other 4 have issues.
Right now I am in the process of seeing how much improvement I can effect on the other cells using the OPUS “refresh mode” along with a Zap or 2 on the NULL reading cells.
I will report back on that later.

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the null are likely discharged to 0 or even reversed.parallel them to a good cell for a short time and see if they wake up.

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snakebite wrote:
the null are likely discharged to 0 or even reversed.parallel them to a good cell for a short time and see if they wake up.

I think you are right about the reversed charge.
To those that haven’t realized it, when cells are drained in series, if one cell drains to 0V it can be reversed charged as the higher capacity cell pushes current through it. VERY bad for the weaker cell, usually killing it.

I did Zap the 2 NULL cells and it did bring them back to life, although not a healthy life.
After the Zap I charged all 4 of the cells that were not up to snuff, then drained them measuring their capacity.
First trial, remember cell #‘s 3 and 7 were the NULL cells.

At this point none of these cells are worth keeping, buts let’s try one other thing. The “charge refresh” mode of the OPUS. What that does is cycles the cells thru a number of charge-discharge cycles, to “give them some exercise”
Here is the result of that.

Better, but still not good enough, these 4 cells are going back to the bin. But not until I try one last thing.
Right now I have the 2 DuraCells in the OPUS charging at a 2A rate, just to see if THAT helps.
Probably not, but let’s see what it does.
EDIT: it didn’t help, those 4 cells are toast.

So, I ended up with 4 good cells out of 8.
Probably what happened with these 8 cells was that they were in an 8 cell device, or perhaps they were 2 pairs of a 4 cell device and 4 of the cells malfunctioned, perhaps due to operator error or just bad luck. Even though 4 of the cells were good, their owner didn’t or couldn’t tell good from bad.
So they all got tossed.

Having an analyzing charger is a good thing! Smile

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I’m impressed those cells are dead like that, i have some of those duracells and your probably right, reverse charging is about the only thing that would kill them

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Good score. Haven’t checked the bins often enough but found a 10 cell Milwaukee with good HG2s over the holidays.

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Bort wrote:
I’m impressed those cells are dead like that, i have some of those duracells and your probably right, reverse charging is about the only thing that would kill them

When I first found them it looked to me as though the original owner mixed the 2 cheap no name brand cells with the 6 DuraCells. If that was what he did, then I was expecting that ALL 6 Duracells would be good and only the no name cells would be bad. If all 8 cells were used in series, only the cells with the lowest capacity (the first to deplete) would be reversed charged. I was a little surprised, something else happened.
Anyway, those were my first thoughts, my premise, and snakebite beat me to my reveal. Big Smile

I said I was going to throw those 4 back into the bin, but for fun I am not done with the 2 bad Duracells yet!
Those 2 have approximately the same capacity, so this morning I fully charged them up and let them fully discharge thru a double AA light that I have driving a 219C.
When this light is on high it draws 2A and climbs as the cells deplete.
Then I charged them up again at a 500mA rate.
Here are the latest numbers.

willie wrote:
Good score. Haven’t checked the bins often enough but found a 10 cell Milwaukee with good HG2s over the holidays.

Yep, as I have said before,

“There’s Gold in them thar hills bins”

http://www.truewestmagazine.com/whats-the-story-behind-the-phrase-theres...

willie, why not post your find?

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Found a Toshiba laptop pack in Lowe’s yesterday. Cells were just slightly below 2 volt. Sanyo ur18650fj 2200mah But didnt warm up at all charging and slightly warm on discharge. By the time 20mah was put in they were at 3.5 it looks like a pack someone never used. It was rated at 4300mah and all cells tested 2170 or better 4 of 6 over 2200. Will keep a eye on them for awhile. Cv stage wrnt quickly like new cells do. Input was roughly discharge capacity Found another no name brand pack at best buy. Only once cell had 1400mah but I use all the dead cells as a reason to go back to the best buy bin when I’m that way. I actually found last month 2 lg hg2 in the bin. On the case it had bad recycle on the case. One cell had a torn wrapper. Once cell tested 2800 the other 3000. There was 4 vtc5 in there with them. But they are pretty worn. Testing between 1600-1700. I use them while low wattage vaping around the house and my good batteries at work to last all day. Save some wear and tear on my expensive cells. Best find those was two perfectly like new hg2. Looks like they were recycled because of a torn wrapper. The free wraps from imr orders fixed that quickly.

I see some people ask about what to say. When approached. Best buy has never approached me I usually have a battery wrapped up to drop in either alkaline or a bad 18650. I break up my bad ones for multi trips (reasons to dig in) If it isn’t piled up near the top I shone my phone light down in there to get a peak if I see something I just snatch it and walk out and don’t look back. I bring a bag with batteries there. So if they see me standing there a minute it looks like I’m dropping stuff off. I do the same at Lowes or home depot sometimes. But usually just walk in and start digging. If anyone says can I help you etc. I say my brother dropped off a couple of my packs for recycling but he brought the wrong ones he brought my good batteries not the dead ones. Usually not a problem. If I don’t see something I’ll still take a couple identical ones to use as another reason to stand around the bin at best buy or another store.

Edit I will say its very addicting I’ve only been doing this for a few months compared to most of you. About 50/50 good cells to trash cells so far. But for free can’t complain. If I get to use them for 6 months then recycle that’s fine. Only get to go by best buy once a month and home depot. Lowes is in town and the only place around here I know of that does battery recycling. Maybe some other smaller stores do I’ll have to see at some point

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Back on the subject of the 40V Ryobi. Anyone knows a way to convert it as a USB power bank? That would become my dream camping power pack…. I know USBEAST sell some module to convert smaller batteries into a power bank but I have never came across such a device to use a 40V battery pack.

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with a little wiring, perhaps something like this would work?

eBay – 4.5-40V DC to 5V 2A USB Charger DC-DC Step-Down Converter Voltmeter Module

sounds like a great idea for portable USB power whatever way you come up with to make it work.

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