Harvesting Free 18650 Li-Ion Cells From Laptop Batteries

[@k4be.]

The strange square component is a controllable fuse. It can blow in three ways: the current through it gets too high, the mosfets underneath (or near) it get too hot, or the third terminal is connected to ground by the control circuitry.

[@candrasniper3404]

Yup, harvesting batteries from laptop battery pack is quite fun. It's like finding a treasure for free. As fun as harvesting the components from the broken electronic. People said it has broken, i said that things is just waiting for being opened.

[@josipzlk8019]

hhahah Thumbs up for that fire extinguisher.Been to praha 4 weeks ago and took some fire extinguishers home...greetings from croatia.

[@e1woqf]

Probably you've got a lot fires to put out since then, I suppose :-) Greetings from Germany

[@CitroenGames]

My sister bought a hover biard after 1 month the moter broke so i tried to repair at the end she said that i could keep it and found 23 li-lion cells and all we in good condicion

[@aaroncatolico7550]

*Where did you get the free laptop batteries from?*

[@TheSpotify95]

That was a relatively easy laptop pack to open! I've had quite a few laptop battery packs which have been a right pig to open. It's also good that none of them are the Panasonic CGR18650D. I always call them "CGR18650 Detonating" because they always try and detonate themselve whenever I take apart a battery pack with these cells! FYI: I had 2 battery packs with these cells and they both tried short circuiting on me, destroying some of the cells.

[@UltraRik]

Hello from Croatia, we drink fire extinguishers!

[@L30NBL4NK]

Was it verey dodgeeeey ??

[@adamsucksatyt]

0:58 And find a LOT of good LEDs in a bad led light bulb Mostly surface-mount LEDs but sometimes even through-hole LEDs And I don't know why the manufacturers put the LEDs in series because if one LED fails then the whole light bulb fails. Example: 12 watt LED light bulb has 12 LEDs 1 watt each. One LED fails and the whole light bulb fails. Even though you still have 11 LEDs okay in the light bulb. So that's why I do it this way Sometimes I take some light bulbs home, dissemble the LED light bulbs, look out for good LEDs with a multimeter on continuity mode, then desolder them from the PCB board and use them in my projects. I love salvaging LEDs! You don't have to buy them online! Btw I know that bad light bulbs may contain hazardous chemicals but I don't care because I dissect the LED light bulbs outside. Batteries: recycle Other stuff: reuse, then recycle

[@ch2o2]

I'm wondering how you determine the cell-capacity so "exactly" ..do you use a constant-current discharger and measuring time until you reach the voltage-minimum (which is how high, btw?)? ..thanks

[@oniruddhoalam2039]

He made a battery analyser which discharges the battery by drawing a constant current. The microcontroller in it adjusts the voltage applied to the gate of a MOSFET and also calculates the value of the capacity by multiplying the current with the time.

[@TheSpotify95]

Constant current discharge from 4.2V to 3.0V for Lithium Ion. Set the current to whatever value you need for your application and size of battery (usually 0.2A - 0.5A for smaller batteries, 1A for larger batteries). DGW uses 0.5A for 18650s but I do a more thorough test at 1A, because any battery that works at 1A will work at 0.5A, but really old batteries may work at 0.5A, but not at 1.0A.

[@stackthatcheese7020]

I like the videooooooooooooooo You taught me a lot of thiiiiiiiiiiiiiiiiiiings about batterieeeeeeeeeeeeeeeees

[@MohamedAmiNeRm]

Hahaha

[@fatih3194]

hey can you show us discharge video with how much current and to how much low voltage you go with it

[@TheSpotify95]

How do you manage to get these laptop cells for free? Nowhere in my area have I come across places that will give away their laptop batteries...

[@cbm80amiga]

But yoy can buy they locally quite cheap. Let's say $5 for bad battery with 8-9 cells it is still good deal.

[@bitelaserkhalif]

Computer repair shops usually had them in stock

[@pasapucha]

Regards from Nepal to the Croatian Fire extinguisher 😄😂🤣

[@IscleGaming]

You can use the included BMS of those batteries, they might seem difficult to use but they usually have 2 pins for each pole, so 2pins are + and 2 pins are - and then the middle ones tend to be I2C connections to give details to the computer... if you hook up a constant current PSU to the inputs and limit it to the right voltage they will charge and balance!

[@DiodeGoneWild]

I don't like those obscure chips, especially when hooked to an EEPROM memory :). And I only needed individual cells, not a 14.8V pack.

[@berndeckenfels]

That sticker looks like thermo sensitive paper, maybe that’s for warranty to see overheated returns?

[@nexustablet4124]

Wow! My old broken laptop gave up 4 perfectly good Japanese 18650s! Thank you!

[@slamisekk]

No a kde se dají zadarmo sehnat akumulátory ze starých notebooků? Já to nikde nemůžu sehnat. Všude se ptám u známých a nic nemají.

[@97ickis]

Can you please explain how you rate the discharge rate and number of cycles, (I.E. how to determine what life a LiOn may have? Thank you.

[@mrb632]

I wandered if we could take advantage of the remaining controlling board with the same batteries after fixing them to charge them and use any buck converter to appropriate voltage

[@LMB222]

Do it. The interface is a modified I²C, the chip gives you charge, temperature etc. Even if you can't access the chip, you can use it as an intelligent battery charger.

[@bwselectronic]

I just received an Opus BT-C3100 V2.2 from AliExpress that I paid about $30 for including shipping. It's going to let me test 4 batteries at once. It's easy to use and I've already started testing batteries. It's faster if you charge the batteries first in another charger and then test them.

[@franklinbinas6240]

You can use the board for battery protection

[@TheSpotify95]

The laptop's PCB is not usually very good for using as a charge controller/protection PCB. They're only good if you need a 3S or 4S configuration (depending on the battery pack), plus they all have different pinouts, and some won't allow you to charge or discharge them at all unless you hook up the relevant data communication pins (probably some form of I2C interface). It's better to just salvage the cells, test the cells, then buy a cheap protection PCB from eBay (make sure to balance the cells first).

[@SirWolfCZ]

Danyk, at what discharge current do you measure the capacity?

[@hvk3929]

Let me ask a question. What is the thing in DIODEHONEWILD emblem.

[@danielhorne6042]

i dont know why but when i disassemble a pack i get sweaty nervous . it feels like diffusing a bomb lol

[@lenaroseguera1241]

how do you do the cycle for lithium batteries?

[@chelarestelar]

Each cycle is a full charge and then discharge. Doesn't matter the order or if each time you charge/dicharge partially. For example, you have a battery at 100% and discharge to 70%, then charge to 80% and then discharge to 50%. If you add all the discharges and charges, you charged 30% and discharged 50% so not a full cycle.

[@carlnikolov]

Why does the 5 cycle count save the battery?

[@zx8401ztv]

I replaced the battery in my old laptop last week, i should break open the old battery and see if any are alive, but i dont have use for them yet.

[@DiodeGoneWild]

I replaced my entire laptop last month :). I didn't open the battery of the old one yet. It was running on AC all the time and the battery now lasts 1 minute. After 10 years, the battery is totally rotten. You don't even have to use it. Just keeping the battery at 100% all the time is enough to ruin it. Maybe just 1 cell is bad, but more likely all of them are. I will probably open the battery in another video.

[@zx8401ztv]

Yes thats just what my battery did, and i do keep the very old lappy (acer aspire 5315 2006 ) on its supply, i never need it to be mobile, but if i have a power cut its nice to have some time to save a circuit diagram im editing, and close the machine down propperly :-D. lol replacing the laptop is an extream way to gain a battery :)

[@riskinhos]

make a powerbank

[@shark70007000]

I discovered this a while back. So any old laptop that was being junked, I tore the battery packs apart. I have lots of those 18650 batteries now.

[@eddyfontaineyoutu100]

Nice video, Thanks !!!

[@MMaheshThakur]

Hoe do u check battery capacity. I also want to check remaining battery capacity. Plz reply

[@bostjantrancar9605]

Like that fire extinguisher.... 👍

[@semiRockethr]

Well it has the same color as fire extinguishes do.

[@adamsucksatyt]

Best fire extinguisher ever!!! It's beer 🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺🍺

[@1marcelfilms]

If you buy tool batteries on sale you get high discharge batteries.

[@BenBeyond2003]

I have harvested roughly 300 in total

[@PolakeXD]

did you keep the circuit boards or just sold/trow them away? I actually always keep them only because you always can re-use them by making small modifications

[@kendarr]

@@PolakeXD witch modifications? I don't have a external charger for them and I am planning on harvest some

[@funhok8809]

Just give them a little shock with 12v and when they goes above 2.5v then charge them properly

[@alialpha8982]

Nice even after 3 years old video 😂😁 greating from Morroco 😊

[@hackeritalics]

Diode:"There is some temperature sensor here.... *DIGS FRANTICALLY WITH A SCREW DRIVER INTO THE 8 CELL LITHIUM PACK*" Me:"Holy fuck... *Big Grin as I raise in my seat reactivity, getting ready to jump back from the explosion*"

[@Tremor244]

6:40 when the quiet kid pulls a gun out of his bag

[@antoniotod9614]

karlovačko pivo xD... greetings from Croatia:)

[@advaithmadhavan8260]

Hi, this is a very dangerous procedure that nobody should follow. When a lithium ion battery reaches a voltage of below 2.5 Volts, it develops small conductive particles called dendrites, which are generally formed by the peeling off of the copper electrodes present inside the lithium ion battery. When you try to charge the overdischarged lithium ion battery (i.e. the battery with a voltage below 2.5 Volts, it causes the copper dendrite pieces to melt and get plated back on the non conductive parts of the lithium ion battery, which will cause an internal short circuit. This procedure is very dangerous and the battery can explode or catch fire during the charging process. Even the use of the 0v function on most of the expensive lithium ion battery chargers, is also very dangerous. I was using the 0v function on my Xtar VC2 charger to revive my overdischarged 18650 batteries and the batteries ended up smoking and almost catching fire.

[@pavelbires]

Your comment is right. But, i have salvaged about 3 laptop batteries, one had 6 batteries, (18650) and one of them had very high self-discharge current. They were discharged to about 0.8v each. They all survived (except that one) and I charged them with $1 charger (he did teardown of it). No heat, but i need to make capacity tester (just 500mA CC load) and to test them. I guess you got very unlicky, or i got lucky...

[@oniruddhoalam2039]

You are ready right.

[@TheSpotify95]

Most batteries are probably fine even if they reach a low voltage. I have had some cells with a relatively low voltage come up with a decent capacity when fully charged and tested. In fact, some of the lower voltage cells gave a higher capacity than the ones at a decent storage voltage - probably because the PCB shut off the pack and stopped the battery from charging. I've never had an 18650 battery catch fire, or even show any signs of internal damage such as what you explain. However, some 18650s can be bad in that they have a very high internal impedance, and/or get hot whilst charging. These batteries should not be used, and should be recycled.

[@burtgummer9057]

The cheap power banks probably have recycled cells in them already..

[@akhiltechie9044]

Best video

[@spotifygaming95]

They're old because it says Compaq on the battery. Compaq has since been morphed into HP.

[@KRKATANAKID]

spotify95 The Compaq name was still used until around 6-7ish years ago

[@sigataros]

I don't know about you all but i really wanna eat those batteries

[@HDXFH]

Canadian made cells

[@quanbaocao9569]

like this !😀😀

[@guiterman6263]

Free where u getting all those free laptop batteries all I can get I have to pay for dude

[@dejanzdravkovic9010]

You gott a balls must admitt!

[@Powerack]

Not that engrish comment again! Nauč se sakra mluvit!

[@shayhsopwagqehghggtfyggty2635]

2.8 V = 2 17.5 V = 9 EE tdlbi 7.4V njt - 5V mokt Fhyd 38° ghr 40° × xran 2° zse cfwjc 1.04KM T + - dtus wyxy oofwye FUAEVBOLP 2-50-3A Wgrs 1H 16.70Se 26KM

[@1959Berre]

I can not sing, so I guess I would never be able to do this.

[@markaroundbarbados]

Looks like a fake Compaq battery pack. Was very easy to open and the packaging looks cheap and badly printed.

[@destroyityourself9696]

Tyooo tyoo tyoooooo

[@DavidMG99]

🤔🤔

[@sivakrishnat5471]

this is very crude engineering. Didn't expect laptops using sloppy battery tech.

[@jvidalw]

my god, the accent!!!!

[@magnetorsfour1612]

omg stop saying " TJŮ " its fakin " TŮ " i believe no one told you so far 6:39 ..... Tyou Tyou Tyou....

[@soumyaranjanmaharana2538]

Plzz donate me some laptop battery