Hey guys, let's talk about batteries in 2021. These are still the best and cheapest way to get 18 650 cells. If you're not familiar with these, these are modem battery packs. They are in every single modem in america, they're there just for backup in case the power ever goes out.

This batteries are supposed to power. The modem for you to make emergency calls right. That's on the modems that you have the lines the landlines coming in through a coax cable through your modem. So these batteries sit on top of your tv or next to your tv on your modem for a couple of years, but they rarely ever get used and when the modem gets discarded because it goes uh out of season or the new version comes out or whatever.

Then the whole modem gets sent to the recyclers and the recyclers they take all of these, and they put them in giant bins, sort of like this ones here, and that means that we can buy them and then we can uh harvest the cells. Out of these guys that have sometimes zero cycles on them right, so they're, probably a couple years old, but they have zero cycles or near zero cycles. They come in different versions. This is a two cell version, three cell, another three cell and then four cells in here, and they they all have different uh brands of cells and different models of cells right.

So today we're going to talk about this one right here, which is one that is very popular, that we have and we really really like it, because it's got good cells inside. Let me show you uh how they break apart. So i've shown in many videos before how to take these apart. You just whack them with this, with a hammer and um uh a scraper right, and they just come apart like this.

I already did this this one with that one, and then this glue here makes it a little bit harder to take it off, but then once it loosens up boom, you end up with two of these cells. These all these green ones here usually uh. As far as we can tell all the ones that we've ever opened have the icr 18650-26s, these are 2600 milliamp hours and they're samsung cells, which means they are very good: quality name brand cells right uh, i have opened four one. Two three four i've opened four of these and out of all of these eight cells, only one of them uh is bad.

I checked the voltage on all of these, and these are all three and a half volts, except for this one right here and if you can see, let me show you here: you can see that that battery was some kind, was defective and something leaked and there's A little bit just a tiny bit of corrosion there right so visually. I knew uh that that one was gon na be bad, but the other seven are good and they're good voltage. Now what you can do is you can put these and charge them and cycle them and you can test them right. I would suggest for you guys to do that and then, once you have seven good ones, what you can do is you can build battery uh packs.

You can go the traditional way sort of like this one here and use these holders and then use nickel strips and then do the whole thing or what you can do is also use our system, our system. We have this pcb system that makes it really easy for you to build batteries. All you do, is you get one of these boards and then this is the positive. This is the negative, and then you just mark them in there and load them, and you load them just like you would be loading uh, a remote control uh with batteries they just snap in there into these holders bam, and just like that, you have a 7s Battery this is 24 volts right, and so this uh board can be used.

You can stack more of them on top, and then this is alone you can. You could use this, as is this. Is one 24 volt battery right? But if you wanted to double the capacity of this battery, you just add another board on top and then you can add another board on top and another board on top and they parallel each other. And these have fuses, and these have uh bms's and it's a whole system.

You can build little packs anything from like little battery packs sort of like this one here see these are these ones on the side like that uh, this is a small little battery pack. All the way to giant systems so like this one here is a 20 kilowatt hour, diy powerwall that i'm currently building for this uh building here. So there you go in 2021, modem packs are still the cheapest and the easiest way to get high quality batteries. For very low, economical price right, so, as always uh links are in the description to where you can find a bunch of these ones.

Uh. I want to thank you for watching this video and i'll see you guys on the next one bye. I.

14 thoughts on “Extracting 18650 SAMSUNG cells out of $1.20 Modem Lithium Batteries”
  1. Avataaar/Circle Created with python_avatars Brett Jones says:

    They are not in every single modem they usually are extra if the company even offers them to the customer so why u telling people they are in every single modem

  2. Avataaar/Circle Created with python_avatars marsniper27 says:

    Power goes out to much here for this to be viable with local sources but for places without that issue it's awesome.

  3. Avataaar/Circle Created with python_avatars Joe Salgado says:

    I work for a tv/internet provider and yes those batteries are from the older Arris e-mta modem and I remembered replacing a lot of them modem for newer one. the batteries are for emergency 911 calls when the power goes out. You should contact any cable provider warehouse person and somehow buy directly from them because there are thousands of used and new ones in those warehouse. FYI: those modem fit those small green one but also take the big ones I think the white battery you showed on the video.

  4. Avataaar/Circle Created with python_avatars Richard Feynman says:

    Thanks for this information. I just ordered two 4-cell modems for $20 (with tip) to see what condition they're in. I hope they're not capacitance depleted and are slightly used. I know they won't be the button type and will have soldered tabs on them….but I can fix that.

  5. Avataaar/Circle Created with python_avatars laernulieNlaernulieNlaernulieN says:

    Is there an option to connect the modules in either series or parallel? This would make them a lot more versatile for a range of operations.

  6. Avataaar/Circle Created with python_avatars Ruckus Garage says:

    FWIW my last batch of 15 batteries (30 cells) one of them came with LGDBB31865 – K063C042A1 cells. So they’re not 100% Samsung. Still an amazing deal and I can’t wait to put them to use!

  7. Avataaar/Circle Created with python_avatars Victory First says:

    My hat is off to you fella. You must have loads of time on your hands. I prefer to just watch you do your thing. Peace. VF

  8. Avataaar/Circle Created with python_avatars John Hlaj says:

    I'm surprised a hammer and blade is being used here. It would be a good idea to build a fixture where you can load the battery pack and with a blade on a handle crack it open. Like a pill splitter. Add a second step that pulls/pries the casing apart too.

  9. Avataaar/Circle Created with python_avatars John Ridley says:

    "every single modem in America" – I have NEVER had a cable modem with battery backup. I had to add my own UPS.
    Also – your ISP swaps your modem out when it gets old? Ours barely replaces them if they actually break. Lots of people I know around here running ancient modems.

  10. Avataaar/Circle Created with python_avatars Jupp Schlabutt says:

    While living in Germany i have never seen a Modem with Batteries. We have Power from the Outlet, and if not, we can live the one Hour a Year without the Modem.

  11. Avataaar/Circle Created with python_avatars NoMercyInc says:

    18650 batteries are cheap as fuck and if you cant afford new batteries your an embarrassment, my router/modem does not have a battery pack

  12. Avataaar/Circle Created with python_avatars Nathan Hale says:

    I just ordered 15 of the green ones. I've harvested laptop and old tool batteries many times. I use a dab of rosin and a bit of solder to make a button so they fit in common things like my led headlights. So thanks so much for this tip. I'll be using thr crap outta this one.

  13. Avataaar/Circle Created with python_avatars Aaron John Dela Cruz says:

    i extract mine on laptop battery packs

    sometimes i got
    lgdas31865 2200mah the blue one and the orange 1 lgabc21865 2800 mah
    and some lenovo packs uses panasonic icr 18650 3400 mah

    i use it to build a power banks or a battery pack for my drill

  14. Avataaar/Circle Created with python_avatars Prime Technophilia says:

    But at $1.2 for these packs, your going to make a steal! What a business opportunity to get access to!

    Nice, except here in Australia they didn't even bother with backup systems for the modem (NBN) network they upgraded too. If you had a medical emergency then you just had to deal with mobile phone access which allot of elderly people struggle with even basic usage (and blind/disabled).

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.