How to get 18650 batteries cheap
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- Опубліковано 20 вер 2024
- Opening old notebook batteries and salvaging 18650 cells
I've got Samsung, Sony, Panasonic, and some unbranded cells.
Bought 5 broken laptop batteries for 17 USD and this is what i got.
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last year, 2021, someone gave me a Dell laptop from the late 1990s. i removed the batteries, 8 red ones i think, and they were all still holding a 3.5v charge even though they hadnt been charged for over 10 years. they are all working and holding a charge better than new ones i bought in 2020. Old laptops are a great resource for 18650s
Panasonic make 3600mAh cells and soon they are releasing 4000mAh cells (which they have already made prototypes of). So a lot of these old used batteries you got are really only 1/3rd as good as the new Panasonic's that will be released. But at 0.6 dollars a cell you still are winning, as the new Panasonic's will very likely be around 8 dollars each. Or in bulk maybe 5 dollars each. So it's still worth doing what you are doing here.
Great idea. He could actually repair the broken laptop batteries and sell them back on eBay.
epSos.de he'd have to have a soldering iron.
Jim Davis wow what a huge problem
Duh
I just looked on craigslist here in vegas and there is nothing on there that would be worth it at the moment but I am going to keep my eye out for something - Thanks for the video - I was thinking about using these for my electric skateboard video
-Kage
Vegas here too!
Can we make a battery with multiple amp 18650 cells
You can charge the dead batteries for long time (24 hr) to become live
Some times it works, but mostly they will not hold a charge after they were dead. Hontestly it's a waste of time.
There are chargers in the market that activate 0 volt zombie cells
Old TP4056 module can initiate charging. After that i put them in smart charger (OPUS BT-C3100) but usualy they cant hold charge.
That works as long as cells arent damaged......a dead cell stays dead, no matter what. A cell that isnt working mustnt be necessarally dead, but once dead, i will stay dead.
Isn't it really dangerous to discharge them beyond 2v?
No no
I opened today a faulty Powerbank from eloop (50000mAh) which had 8 Cells inside and 3 of them were death with 0V and 1 with below 2V, the other 4 are all above 3V. The one with 1.xxV I was able to charge but the 3 with 0V! So, I opened one of that 0V Cells to find out, that inside was just fine Sand, and so in those other 2 0V Cells. All those cells were totally unmarked: NO Name, NO mAh etc., all in red plastic shrink foil. Comp[ared the looking of the upper (+) connect, showed that the upper connect were about 0.5mm below of the 'good' 5 Cells on those 3 0V Cells.
That all said, dealing with those 2.Hand. LI-ION Batteries requires a lot of tension for to sort out the good from the bad. Still the user could save quite a bit of money using such Cells for to power some devices. And from my own experiences, the best one allway I found in old, just original Laptop Power Backs.
Can i use those cells for create a e-bike battery?
Real safe doing with a knife.
Here In California downtown there's lots of cell phone wholesale places so I just buy a bunch of portable chargers this way there all brand new.
HypasMusic how much do you pay?
I like that pocket knife.
Really want to see them after charge to see what kind of life they have left!!
he listed each batteries useable capacity at the end...
Does bms support it
Was there a good bms in the packs? Could they have been salvaged?
To much work for checking BMS. Its easier to buy them on ebay for 2$
What did you use to test the cells capacity?
Opus charger
ebay.to/2JXQw9z
how to get the capacity of each cel
Really nice, haven't seen this video before. :) Otherwise I would have put it as reference in my last video. (I made a charger too and so on.) :)
Wear gloves belive me these can be sharp
Hello, I was wondering if you could give me your suggestion.
I have 6 packs of 24-18650 cells in parallel. And I want to build a power bank that can power 12 volt Accessories I also have a 12v 1000 watt pure sine wave inverter. How can I connect all 6 packs together to achieve the 12 volts. Thanks so much for your input. I'm hoping to get 100ahs for battery. Thanks
You be better building yourself 4s only change it to 16 v because 12v device's will not power on at higher than 16v it will make you lost 20% capacity but you will get more rechange cycles at 80% discharge about 1000s or higher
Do you value your time? Put the cost in. The trees will be very shorted in the life. Just buy a wholesale lot with your mates and get good quality trees
I had about 100 of those red unbranded they overheat when charging 60% of the time
Those are sanyo batteries - they always overheat after some time - try to charge them with 100-200mA to 3.8 -4.0 V and leave them for 2-3 days. After that try to charge them to 4.2V. Often 50% of cells works just fine after this. But i avoid sanyo because of that. Samsung for example - 90% of cells in laptop batteries are ok. LG is similar percent.
and i thought we would see some ultra fires drop out! i have an old ibook batt i want to go into. anyone ever open 1? would like to know if its worth it
and you might want to slow down with that hawkbill there slim! but very good presentation
I would think old batteries would have been throw out for not being able to hold a charge.
Do you have a video on how to measure the capacity? How did you do that?
ua-cam.com/video/mduBqDeNOto/v-deo.html
I also use Opus bt-c3100
como obtuvo la capacidad de cada celda---???
how can u tell wich side is +/- if they are not branded like mine?
Take look at 2:54 min of video. Positive is top of the battery with groove. If you take closer look when i test their voltage you will see that I always put red wire on positive and black on negative.
This doesn't work because they don't use these kind of batteries in inexpensive electronics anymore..... :'^( need new sources
At walmart
gloves
Everyone of these sites tell you nothing WTF
V
That does not look safe at all.
I just twist em takes me 10 seconds