Large number of laptop batteries

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Hagg911
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Large number of laptop batteries
So I have a large number of used laptop batteries, about 80 packs. There are three kinds one type has 9 18650s in them and the other two have 6 18650s in them. So needless to say I have way to many. Is there a market for these old 18650s? or even the packs? I am guessing if I were to pull them all it would be around 500 18650s. Will get pics up as soon as I figure out how.
likevvii
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Bless your fingers and your patience.
You can make giant battery packs for E-bikes!

Bort
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likevvii wrote:
Bless your fingers and your patience.
You can make giant battery packs for E-bikes!

very clever idea, 1 battery equals about 1km, i just wish there was a way to stack X number of cells together and a controller that would handle it

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Hagg911
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Well after 6 packs, I think I have more than I can use lol.

lagman
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Where do you live?
I’m sure there are people here who would buy a few.

My English isn’t perfect but I’m trying to improve it. If you see something that doesn’t sound right or is just plain wrong, please feel free to point it out! Smile

unknown00101
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A few members sell pulled laptop cells.

It would take a long time, but if you could verify the capacity and quality of the cells that would be for the best.

What might work even better is if they are all identical packs (same brand/capacity for the 9 packs and 6 packs), verify the type of cell(capacity/viability) in the each type of pack and then sell the other packs as whole units instead of breaking all the cells out.

Hagg911
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Huntington, WV. If you need some let me know. I have more than I can ever use. By several factors.

leaftye
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It's a lot of work for very little money.  Unless you're doing it as a kindness to the forum, sell the unopened packs for whatever you can get on ebay.

The low mode should be lower.

comfychair
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Used laptop packs are most times not worth it. Sorting through them to find the completely dead cells, the ones with 30% capacity remaining, and the 'good' ones with 60%... not worth it. Laptops are incredibly unkind to their batteries. Old but unused laptop packs are a different story.

likevvii
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Toss all batteries that measure under 3v (3.2 to be safe)
If you can, try to check what year are the laptops that run these batteries made in. Anything over 6 years could be tossed.
If you have a charger that can measure capacity (ex:imaxB6 for 20$ on ebay) you can test the capacity of the battery by discharging it after you fully charge them.
I think you should wait until someone wants these batteries, then take them apart. You can give them an option of having solder tabs or not.

By the way, you can use the battery packs as actual battery packs. They come with a built in protection board and thermal resistors. Just solder your plug to the + and -

Hagg911
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!!Image and video hosting by TinyPic! !

Ok Red I have opened 2 packs, 18 total batteries. None have been lower than 4.02v
Dark green, 1 pack, 6 batteries. Range from 3.03-3.43v
Neon green, 1 pack, 6 batteries. 2.4-2.9v

Hope I did that picture right.

dchomak
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That neon green one is an IMR. Are you sure that didn’t come from a drill pack?

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Neon green is samsung 2200mah. Dark green is sony 2400mah. Red is sanyo 2600mah.

Red are the only decent ones with enough potential capacity to justify extracting and testing imo.

BLF

Hagg911
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dchomak wrote:
That neon green one is an IMR. Are you sure that didn’t come from a drill pack?

Laptop. Charging them now to see how they hold a charge.

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Just showing off.

To are cells above 2.7v (my personal cut off). Bottom row is cells above 3.8v.

Blue ones are samsung 15M’s (IMR)! Still have a couple more packs from today. I really like the 15M’s I had about 15-20 already.

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Hagg911
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!Image and video hosting by TinyPic!

These seem to be the most promising. Have 8 packs unopened. These seem to be the best. Opened two packs and they were all above 4v.

!Image and video hosting by TinyPic!

These are the next best all rated above 3v. Have 6 packs.

Image and video hosting by TinyPic

These I have an absolute ton of them about 26 packs. The one I opened they were low all under 3v.

Hagg911
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Would it be worth it to make a few bucks and sell the excess or just go ahead and make that battery to end all batteries.

comfychair
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There's more to it than that. With age they build up internal resistance, you need to do discharge tests on all of them and compare the capacity at low current with capacity at high current (usually 1 amp is good enough). The ones with a large spread between low & high current are junk, regardless of their resting voltage or how well they maintain voltage after charging.

dangerous
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comfychair wrote:

There’s more to it than that. With age they build up internal resistance, you need to do discharge tests on all of them and compare the capacity at low current with capacity at high current (usually 1 amp is good enough). The ones with a large spread between low & high current are junk, regardless of their resting voltage or how well they maintain voltage after charging.

Why do you have to compare high and low current discharge opposed to just testing high current discharge?

BLF

Hagg911
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comfychair wrote:

There’s more to it than that. With age they build up internal resistance, you need to do discharge tests on all of them and compare the capacity at low current with capacity at high current (usually 1 amp is good enough). The ones with a large spread between low & high current are junk, regardless of their resting voltage or how well they maintain voltage after charging.

The thought of testing that many batteries make me giggle…. So what would be the best method to do that?

comfychair
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Please see post #8, I would just end up retyping the same thing over again.

Hagg911
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comfychair wrote:

Used laptop packs are most times not worth it. Sorting through them to find the completely dead cells, the ones with 30% capacity remaining, and the ‘good’ ones with 60%… not worth it. Laptops are incredibly unkind to their batteries. Old but unused laptop packs are a different story.

So not really worth it Smile

comfychair
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It's an awful lot of work to end up with 2 out of every 10 usable only in a low-drain application. And a lot of scrap to haul off to the recycling center. Used laptop packs don't get replaced for no reason.

New, never-charged, never-used packs that have been in storage, just overstock stuff that was taking up space in a warehouse somewhere, for a laptop model that's now obsolete, that somebody bought in bulk at auction and is unloading for cheap on ebay can be excellent value. Used up clapped out laptop packs are almost always not.

Hagg911
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These were from a laptop upgrade for a large group. Some of the batteries are new some are old. But I am the kind of person that hates to see things go to waste. Thus as a hobby endless hours to throw at a project. I know you are trying to save me from a lot of useless work but if I wanted that I don’t think I should be on a flashlight modding forum.

Order 5 chargers that can run charge and discharge tests and just run them while I work? Maybe 10 chargers lol. Other than that I might just pull what I could use in the next couple years and toss the rest. Those are the options. If I toss them I would love to see them go out to people that would like them to tinker with also. So any help you could give would be great, other than “Run away as fast as you can and save your sanity!”

I understand your standpoint but at work I deal with bones and bugs so playing with electronics is just a sort of an escape so the work while tedious would be a welcome relief.

Turby3Pots
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Well hey man I live in Richmond Virginia and have a Honda civic

Just saying Smile

Hagg911
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Let me see how these tests pan out. But I will certainly have more than I can use. So shoot me a pm and we can work something out.

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Roger

leaftye
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Hagg911 wrote:
These were from a laptop upgrade for a large group. Some of the batteries are new some are old. But I am the kind of person that hates to see things go to waste. Thus as a hobby endless hours to throw at a project. I know you are trying to save me from a lot of useless work but if I wanted that I don't think I should be on a flashlight modding forum. Order 5 chargers that can run charge and discharge tests and just run them while I work? Maybe 10 chargers lol. Other than that I might just pull what I could use in the next couple years and toss the rest. Those are the options. If I toss them I would love to see them go out to people that would like them to tinker with also. So any help you could give would be great, other than "Run away as fast as you can and save your sanity!" I understand your standpoint but at work I deal with bones and bugs so playing with electronics is just a sort of an escape so the work while tedious would be a welcome relief.

If you do low and high current tests on all of them, with a hobby charger that tests internal resistance, you'll get 1 or 2 batteries per day per charger.  That's a lot of money and/or time.  If you're not doing it for either one, then go for it.  10 good chargers and power supplies will cost you around $1000.  Even if all 500 batteries are usable, you'd have a hard time selling them for $2 each, but some will be bad, and shipping/supplies isn't free.  I'm testing a batch of cells right now, and even though the batteries are free, it's not worth it for the money, and has made me respect the contributions to our hobby that HKJ has made so much more.

Yes, it's a hobby, but I think you'll be much happier if you put the time towards modding flashlights instead of the monotony of testing hundreds of batteries, 24/7, every day for months to years.

The low mode should be lower.

snakebite
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the neon green are bak.
aftermarket and maybe low use?
the rest?
each pack may have a different amount of wear.
there are utils to read the “wear”
that is untill you strip the packs!
and assuming you can borrow a laptop that takes the pack.
if those were mine i would check each pair of cells with an esr meter after they pass the safe voltage test.
i can usually tell if they are worth charging and testing further.
generally the newer the datecode the better condition they will be in with few exceptions.
are they worth anything?
not on ebay as unknown used packs.
but if you have the time and lots of friends into lights they can be good tradebait after you weed out the duds.
i use a 12 cell gang holder i built and a triton to do the charging.
so 24 cells at a time as i leave them paired.charge and set aside a few days.if they drop a lot thats a sign they are tired.
like starting at 4.17(typical for my setup)and a week later 4.0 or less.recycle those.the ones that stay up are usually quite usefull.
nw you seperate the pairs and discharge a few at 1a.this gives a good idea for their condition.note at this point what you have are always better than ANY “whateverfires”.
i have lots of flashlight and vape mod friends who have been running recycled cells i have processed this way.they save money and it feeds my hobby a bit.
esp when said friends have modded srk!i go further with those and mark cells that were from the same pack.not perfectly matched but better than random used calls.
so now you know what to do.or pass them on to others that want to do this.esp if this is over your head and you just need some good ones to use.i have done that for folks too.everybody wins.
just think that if this catches on in a big way whateverfire brands will get worse as the quality of scrap cells drops due to us weeding out the good ones!

downlinx
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Hagg911,
when you are pulling batteries, get the pictures and battery info over to here to this thread, i am trying to build a community Laptop Pull overview thread.
community laptop Pull overview thead

BLF Community Battery Pull Thread http://budgetlightforum.com/node/32720

Hagg911
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Ok I get it lots of work and little to no return. Let me try it this way does anyone have a step by step process they use for laptop pulls.

Snakebite could I get a picture of your charging setup? What are you using to do the discharge rates?

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