Extracting 18650 SAMSUNG cells out of $1.20 Modem Lithium Batteries

[@jpmcnown1]

I've never used a cable modem with batteries in it.

[@aaronfletcher6664]

Its for companies like Comcast where you home phone is over internet

[@ncot_tech]

My (UK) fibre modem has battery backup… made from two AA NiMH batteries…The instructions even tell me to replace them after two years. Our cable modems don’t have batteries, we just have to use our mobile phones when the power goes off.

[@dh2032]

that why you house walkabout house came with a sticker (not to be be relied upon in an replacement for a connected land line (e.g. a simple phone the just plug into the wall)

[@bradnoyes7955]

@@aaronfletcher6664 My parents have a modem with phone and it does not have a battery backup, so we put it on a UPS. However, if the power goes out, the service from the cable company also fails a few minutes later, so it ended up being unnecessary. I'm assuming the cable company has some powered switch gear in their distribution boxes placed throughout the neighborhood which has it's own that doesn't last very long. Now my cable modem doesn't have phone (or a battery) but during long blackouts, I've seen cable company trucks parked idling next to their distribution boxes with wires running to them, presumably to keep service active during the outage.

[@noelsnave9395]

I have never heard of them till now

[@philipacovington]

Instead of prying it open, try cutting through the stickers on both sides with an exacto or similar blade. Then you can hold the battery in a vise and just push it open with no problem. I did a video on this. The ones I have opened have contained mostly LG cells and they are the most difficult to get the cells out due to the amount of adhesive they use. The Sony and Molicells were the easiest to get the cells out.

[@PRiMETECHAU]

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).

[@Ressy66]

and Australia has shit mobile coverage for any carrier, I'm 45 mins from CBD of Brisbane and lucky to get ONE BAR even outside... NBN = joke, forget third world network, its stone age

[@alerighi]

If it's VDSL, typically goes out on a power outage anyway. That is because VDSL cabinets needs to be near (maximum 200 meters) to the final customer, and they use power. Powering all them up from a central point that has backup power is expensive, since you need long power lines and thus a lot of drop. They are typically powered from the electricity grid (in my country you usually see a normal electricity meter box beside them). Putting a UPS in each one of them is expensive and it will last a couple of hours anyway. I think that is correct to not have backup power in them. Power outages, at least where I live, are so rare that I don't recall having one in 20 years (if not for scheduled maintenance where they will tell you in advance that in a particular day they will cut power). The point of making emergency calls, true in the past analog phones where powered by the phone line. But only wired phones, if you had a cordless (that you typically did) if the power went out you didn't get any power to the RF transmitter and thus you were unable to phone anyway. That was really never a problem.

[@lmmlStudios]

the original fttp nbn under labor did have batteries. massive shame the current gov destroyed the nbn

[@soarer282]

Australia is the asshole of the planet. (we get all the shit)

[@Ressy66]

@@lmmlStudios but those batteries were only going to power for 2 hours, in an outage after a typical Qld storm, its 3 hours min to restore. the batts in POTS exchanges are designed to last 2 days minimum, plenty time to get a generator in, bigger exchanges much longer

[@evanelledev7237]

In Slovakia when the powers go off, it also goes off on the DSLAM in the exchange... 😦

[@Mrhellacat]

I remember my old modem and my newer one having a spot for a battery if you had phone service with them. I find it kind of funny how they try to charge you 35$ a month for whats pretty much a VOIP.

[@earthlingdad]

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.

[@jaileal8806]

I find modems in the dump all the time and harvest to battery packs. The cells are normally depleted to around 1 V (lots of power outages on island where I live) but by jumping them in parallel with a 4.2V Li ion I can get them to read 3.7 V and the the Li ion battery charger can read them and I can charge them up fully.

[@Beakerzor]

5:00 BAM! the camera turns around to reveal the equivalent of 4(?) Telsa domestic power walls - WOW, mind blown

[@jehugarcia]

seems to be a favorite part of this video for a lot of people according to analytics

[@Beakerzor]

@@jehugarcia I just shows this video to my wife explaining the various things I can make, then at 5:00 she was like OMG What is THAT?! - well played sir, thanks

[@victoryfirst2878]

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

[@rutabuga]

interesting, modem backup batteries aren't a thing in the uk. if you lose power you lose internet

[@jeffmpvd7689]

It's mostly for people who rely on their home telephone service via their internet or cable TV provider. So if the power goes out the can still make phone calls just like when they had POTS.

[@iwinrar5207]

What Jeff said

[@PTFuZi]

Yes, I just use an ups for that gear

[@DavidHalko]

In the US, the telco has a requirement to keep the phone on for a period of time in case of a power outage. With voice-data convergence, that regulation trickles down from the voice to the data DSL end point.

[@matthewkriebel7342]

There are modems with 4 or 8 POTS lines on the back that are only used for voice service from the cable company, often in commercial applications. Those have batteries. The data-only ones usually don’t.

[@steveseeger]

Aren't they left for a few years at a high state of charge voltage which is bad for longevity no?

[@LordGryllwotth]

Yes. It is just why laptops suffer.

[@harrytsang1501]

Yes, that is worse than brand new cells or cells stored at 70% charge for a long time. However, the low cycle count and low price actually gives it a compelling case over the cheapest made in China ones you can find.

[@steveseeger]

@@harrytsang1501 I changed them on a server RAID internal board that had an error saying to replace them after about 8 years always on. I don't know the brand, but 18650's. Likely those are just stored at 80% the whole time except once or twice a year power outages

[@steveseeger]

$1.20 is amazing. I'd use those on a project that got lower usage but maybe not a power wall for my house.

[@steveseeger]

@@LordGryllwotth I wonder if these are kept at 80% instead of 100% to keep them longer lasting than 2-3 years you might get otherwise at 100%

[@ronsafranic5177]

Ordered 40 of the $1.20 Modem packs. Here are my results! 40 Packs 80 Cells Ordred 2400 3 2300 7 2200 14 2100 8 2000 14 1900 12 1800 5 1700 5 1600 7 1500 4 Junk 12 Total 91 Jehu Must have sent me some extra packs! I'm not super happy with the results! I have had much better luck in the past with other harvests. They aren't as hard to get apart as Laptop packs but that black glue in them will make you have to put new heat shrink on a bunch of cells.

[@tdomingues89]

realy not a good buy, i would go for the scooters battery at this speed, would be a better deal.

[@tdomingues89]

@@uinerd its because its garbage, and his trying to sell something that has some value lol This is why buying used batterys for salvage is a gamble, now add that with paying a premium for the packs lol

[@JAC13]

No wonder I cannot find these anywhere any more, you have them all...been using modem packs for years to recycle 18650s.

[@YooperFPV]

5:18 3 shelfs up black tubes.... got radioactive material in them? There are white dots all over it.

[@patprop74]

It is great that you are able to get so many from a recycling centre, I have been sourcing them from a goodwill store for years now.

[@peteytwofinger]

me too

[@69jeeper]

Good job Bro! Your always finding sources for used 18650's at a good price. Keep up the good work.

[@MickeyMishra]

I don't know if many people don't know this or not but seriously you're looking at the guy that made doing batteries a do-it-yourself reality for just about everybody out there and he made it so simple and so easy and so safe literally anyone could do it. forget Marvel Super Heroes we have a real one right here in this video.

[@johncoops6897]

Actually, what you are seeing is a simple-seeming guy who is incredibly clever at using social media to promote his company.

[@mortyrickerson6322]

Thank you as always for sharing your knowledge

[@marsniper27]

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

[@jacquesb5248]

i built my first 18650 battery a while ago a could drive a 600va ups for 110min. also got few lower capacity reclaimed cell so going to make more battery units.

[@maebeans]

i'd never heard of this before, what an incredible waste of rare materials, i'm glad they're being recycled into something useful

[@poodlelord]

i was extremely tired when i saw this and thought this was a video about extracting 18k+ lithium batteries

[@AaronInAlaskaBTC]

Ditto

[@henderstech]

Funny, Comcast charges like like 200-300usd for this backup battery for Voip. Most customer who rent a gateway decline the battery and that was fine to do. Be honest after years of seeing customers I cannot think of one time I was asked to include one especially after hearing the price.

[@kaikudoucb7955]

Awesome bro I still got to recover does cells from last video on how to get them out.

[@phillyphus]

Those boxes full of scrap lipo batteries are giving me anxiety. We did refurb on HP laptops and had one catch fire. The company was in hot water with the city afterwards for how they handled them with zero fire suppression around.

[@Shmade0304]

My preferred way in getting cheap cells

[@nathanhale7444]

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.

[@RuckusGarage]

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!

[@scubatrucker6806]

Cool dude. Thanks for sharing

[@MrJamesmix]

In Portugal, if the power fails, the modern fiber phone service doesn't work, the modems don't have a battery

[@mako9673]

They have have very little cycles on them, but wouldn't they have been sitting at 100% for a year or two? That is also not good for lithium batteries.

[@jehugarcia]

Some handle way better than others. Sanyo cells degrade really bad, but LG and Samsung hold up really well

[@jpsalis]

I don't know about Li-Ion, but my experience with LiPos has shown me you want those things at storage whenever possible. Of course LiPos are designed instead for high current output, and aren't usually as stable as Li-Ion, but worth mentioning.

[@johncoops6897]

@@jpsalis - actually using your LiPos will harm then FAR more than storing them at 100% Charge. These kinds of Li-Ion cells are specifically designed to be left at high charge rates for long periods, which is why they are used in Laptops, Modems, etc.

[@TheAussieRepairGuy]

Modems in Australia don't have batteries. The gov't decided to put us on VDSL via FTTN - and reused the crappy copper cable to our houses. Any time there is a storm, the connection drops. I had to design my own USB board to seamlessly change over to 12v battery supply. They also did away with POTS service in favor or IP phones - not a great idea.

[@Ressy66]

Europe has the right idea, fttn, but the node passes X pairs back to exchange so you keep POTS, of course NBN are too cheap to upgrade every home by installing NTD with central filer (you cant really use inline filters at vdsl, its essentially a bridge tap and will reduce performance and induce drops) there is a doc from pre planning by suppliers that had this in it, but NBN opted for the el cheapo garbage we get today.

[@commodorenut]

My 2015 installed FTTP NBN includes a 12V 7Ah SLA as backup. I’ve replaced it twice now, because once it starts to beep (indicating a bad battery) the NBN goes flaky. Tried running without it but it needs the battery attached to stop the incessant beeping. If I can work out the PSU needs of the modem itself I could get rid of the backup box & PSU combo, but there’s no V or A specs noted on any of the components except the battery itself.

[@TheAussieRepairGuy]

@@commodorenut fiber to the premises is not available in rural areas, only fiber to the node. No battery backup provided for those. You got lucky to get fttp.

[@TheAussieRepairGuy]

@@commodorenut to solve the beeping issue, add a bigger 12v battery on longer wires. Many of those charge circuits overcharge those little SLA bstteries. An old car battery will shut it up, a d you can top up the cells. It should also dissapate far more heat, and therefore live much longer.

[@counterstrikelord]

Been looking into making my own battery for my house. Interesting video

[@FranckyAntoine]

I see a pallet of scooters in the back will you be listing them on the site soon. Al's what's the easiest way of making a battery pack for a electric skateboard

[@Kfrankie46]

I was interested in getting one of those scooters too, I asked Jehu in his last livestream and he said that it is just too time consuming to box them up individually to sell for their size of a team and that he would probably sell a pallet of them but individually it just doesn't make sense

[@cmsjr123]

He spoke about how unless it’s bulk he will not be selling them. You can email them but they mentioned there’s no margin/profit in selling them in small orders or even individually.

[@DCW09]

> what's the easiest way of making a battery pack for a electric skateboard Depends on what you want. How large are you? Inner Tube Tires or Polyurethane? What kind of range do you want? What kind of terrain are you riding on (hills, grass, flat, pavement, dirt)? What kind of motors (Hub vs Outrunners)? What KV are the motors? Which ESC (VESC) you're using? The easiest way: Buy one from a reputable builder. If you're dead set on DIY, NESE makes a Friction Fit option for 18650/21700 cells so no concerns of Spot Welding. If you have a Spot welder already "brick packs" are the easiest; If you dont understand what im saying. You need to do more research. There are several forums for Esk8 specifically Esk8News (is the most popular/active) and have several battery builders that share their experience, knowledge and tips.

[@Strange_Brew]

They stopped using the arris modems They had 4 Samsung icr2800 grade A cells. I got a lot from the recycler. All brand new in sealed packages

[@nosam1234]

Your videos are awesome!!! I just bought a lot of laptop batteries, and some chargers, but I'm not sure how to use these chargers, there is a Nord setting, not sure what I'm doing. Please help

[@pete3897]

"they're in Every Single Modem" !? *reaches for his 56K* ...

[@johncoops6897]

My 56K was in an internal ISA slot, 8-bit for the win! I seem to recall there was a small battery on it, perhaps to save the config data?

[@johncoops6897]

@@Josh-cw8by - I recently built a power wall from LR2032 motherboard BIOS backup cells, but it's not really living up to all the hype.

[@fixins]

I think recycling these cells is awesome. However wouldn't a cheaper and easier fix be getting a plug (molex connector?) for the cells to be used as-is? That way there's no smashing of cases and/or ripping of plastic goo?

[@tahoma6889]

The point is to free the cells for construction of packs at varying voltage and capacity. there is a need that the cells match and are balanced. Each cell needs to be tested carefully. Ham radio is one application that comes to mind. Building a 12 volt pack at 2 amp hours is a common goal. This means something like 8 cells. Look up Building a LiPo pack ham radio.

[@AaronInAlaskaBTC]

Someone didn't finish the video before commenting :-)

[@dennisyoung4631]

Bookmarked for future battery-buys.

[@allrocks8697]

Mind blown🔥🔥

[@UncleSaif]

Dude u are a sho nuff resource. Thanks

[@Goldarrow.89]

its nice that your recycling these and their not going into the landfill

[@wakeupcanadians]

these are not in our modems in Canada

[@onekewlbraddah8460]

I remember Jehu from Jag35 Camera rigs. If you know you know!

[@KrazyMitchAdventures]

Here in Canada, our cable boxes dont have a battery backup.. If the power goes out, then you're without power, unless you have a genset backup.

[@JAC13]

not cable boxes, phone modems, so that you can still have a working modem in case of a power outage

[@dainiusk.7632]

why dont you just create a cable interface for those batteries? I assume it has BMS and fuses already

[@jehugarcia]

Working on it

[@legleg752]

pretty much nothing here in aus has battery backup which is a pity. id live to make my own battery packs but theres just nothing around that you can harvest cells from aside from finding a source of dead laptop batteries, and even those are harder to get hold of because people are switched on to others finding value in dead electronics so its often cheaper and easier just to buy new cells

[@johncoops6897]

I get absolutely tons of free laptops in the council cleanups (curb-side trash collection). I can't disassemble and test them fast enough with one Opus 4-bay, two SkyRC chargers and two bench power supplies. So, look for the whole laptops, rather than just the battery packs. Also a great source of "INR" type cells (usually 10A continuous) is cordless vacuum cleaners. People chuck them away as "faulty" because they empty the dust bin but never clean the filters. I find a few each week and they work fine, but cannot suck anything with 1/2" of crap blocking the filters. Those cells are usually 2000mAh 10A and test about 2100mAh at 1A discharge. Yeah, they are all randomly mismatched, but they are 100% free.

[@legleg752]

@@johncoops6897 obviously the area i live in people are stingy as fuck then i guess XD. also curbside collection only happens every couple of years in my parts of the country. dead electronics of every kind are put up on facebook etc for sale in my town. i have a mobility scooter and was looking for one for parts as its pretty old, some bloke wanted to sell me an old 3 wheeler that must have come out of the 70s and had been sitting in a paddock for who knows how long and he wanted hundreds for it. hard to get anything where i live without paying too much for it. but then i dont live in a capital city either.

[@Lar_ry]

Now where to locate a new supply for them as the secret is now out. I was doing this years ago but kinda stopped with my li-ion battery projects as I was moving. Now I want to make a huge home power bank.

[@ToT0MoD]

i would love to see this mans shop in real life, i think it's a real goldmine for tech-nerds like i consider myself. thanks for the very inspiring video!

[@davidgeiger]

Not your standard modem batteries, most people only ever see these in VOIP modems, so you can still call 911 in an outage.

[@james10739]

Ya I do low voltage stuff and have rarely seen them installed but I have my own equipment but I mean for a couple bucks having it stay on for a little bit if power goes out is worth it I have a UPS so I have it covered when the power does down I don't even miss a beat playing warzone

[@jmi5969]

Alright, please tell a stupid foreigner what goes on there... Can't you just make a regular (cell)phone call? The cellular bases have their own battery packs, they stay on even if the whole town is down (although then the number of calls may exceed the network capacity).

[@davidgeiger]

@@jmi5969 in America land lines are still a major factor, not everyone needs or has a cell phone. Also contrary to urban dwellers beliefs there is a rural America and not all areas have good cell coverage.

[@superchiaki]

@@davidgeiger but how you use the phone if there is no power for the phone?

[@johncoops6897]

@@superchiaki - a normal (non-cordless) telephone doesn't need mains power. It is powered by the phone lines alone.

Aren't these batteries kept fully charged for years? That is not very good for longevity...

[@RealCheesyBread]

Lithium ion batteries actually do really well if they are fully charged for years. The thing that kills them is if they get drained below a certain point, or if they get overcharged by a faulty controller. If they are charged or discharged at too high of a current then that can also damage them. Those batteries are not going to meet their original capacity specs, but if they are tested for their actual capacity and voltage, then they can be properly grouped together and can managed by a proper controller. They will last a long time.

[@AznGothic]

@@RealCheesyBread That's actually false. Lithium Ion batteries do really well if they are 80% charged for years. Not 100%.

[@jakeeames725]

When are you going to stock up on the DIY kits like the “2.2 kwh power pack project” and the “ammo can” on your website?

[@AaronJohnProduction]

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

[@johncoops6897]

You shouldn't use laptop cells for high current applications like power tools. The cells are not designed for the high discharge current, and may give terrible tool performance and/or the cells will get damaged or even catch fire from overheating.

[@goatslayerwp]

I have never once had a modem that had batteries.

[@dwindeyer]

It's only going to be in areas with no dedicated PSTN line, and a requirement by state law to have power on the telephone service so you can use a passive handset during a black out.

[@domalash]

I would try setting up a dremel like a table saw or use an actual table saw to cut all four side. Hopefully the depth of cut needed is same on all four sides but you could do all one side then setup for the next side.

[@peteytwofinger]

ha ha .

[@JAC13]

just slice the sticker in half and then take vise grip pliers on the end with the connector and pull apart, easiest and fastest way to do it.

[@Nettle314]

How long will those BMSes on those PCB boards last?

[@jehugarcia]

Unknown

[@KeigoMoriyama]

the problem is sill shipping not aailable for japan. And the link you give brings to batteryhookup that doesn’t have these

[@TrueHelpTV]

how do you approach locating these types of recyclers?

[@BoHolbo]

I’m only a couple of minutes into watching this, so apologies if my question is answered before the end of the video. The modems that these batteries comes from, (let’s just concentrate on the green packs, since they seem to be the favorite) is it known how the BMS in those modems manage the cells? In particular, at what voltage are the cells kept? (I’m hoping that they’re not charged to a voltage higher than 4.1V/cell.) (Assuming they’re not LiHv cells, which can’t imagine they would choose for a simple cable modem.)

[@shroomiestshroom3655]

according to the info of the packaging they get charged to 4.2v each, its an 8.4v 2600mah pack, but i assume it's probably not tested at that, will just be copy and paste from the samsung docs, but they can be charged at 4.2v each according to samsung specifications, but it is right at the top of what these batteries can accept, i would expect a lot less cycles from them, they are only 1/10th the price from buying the batteries new from a proper supplier so i think you will still make a huge saving going this route, even if you loose 1/3rd the total cycles.

[@BigSmartArmed]

Don't waste your time on used cells, this is not a good deal.

[@BoHolbo]

@@BigSmartArmed Do have any evidence to back up your inane claim with?

[@BigSmartArmed]

@@BoHolbo What claim? That seller only uses FedEx for shipping, it's a fact, not a claim. Shipping costs come to half of the order cost, while other commenters here stated that shipping was as high as $50 per order. It's the final cost that matters, not advertised price.

[@BoHolbo]

@@BigSmartArmed I’ll accept your answer, except for one thing. The points that you brought up, doesn’t address anything talked about in the comment thread that I started. It would have made a lot more sense if you had posted it in the main thread instead.

[@prodrumernate]

Awesome video and love the fact it gives more detail on the how to and everything.a question I do have is how can I come about getting the batteries and cells like this?a place where i can go buy them in bulk bins for my off grid property and other projects?thank you

[@DrakeOola]

He put links in the description. You can also check local computer repair shops to see if they have any old batteries you can salvage

[@aidan0244]

Where can I get that battery holder thing?

[@tahoma6889]

Never charge indoors. Always maintain batteries properly per specs. Set up something contained outside for charging. Using an old file cabinet (steel), washing machine, freezer, or similar. Two people I know have had fire while charging hobby battery packs.

[@cameltoast]

Charge outdoors???

[@kirtxpress]

I have solar with a NET meter. would it be worth it to build a power wall for my home?

[@tht1guyfromtht1place70]

Where do i get the board

[@Josstrigaming]

Cool video! I had a question, do you need to balance the battery voltage when making these battery packs?

[@nickknel]

the fcc no longer requres the ISP to give these out making them thankfully less common. they were not super useful anyways as if the powers down in your area and you are on a hybrid fiber/coax the lines are dark anyways meaning they give you maybe 4 hours. cell phones made these not useful

[@tahoma6889]

And Ham Radio makes them all second option :)

[@francovanmarrewijk]

All those pallets of boxes are bateries??

[@jehugarcia]

Yes

[@joesalgadSF415]

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.

[@jehugarcia]

There’s enough of these for the next few years.

[@JAC13]

yep, I work for a cable company and I was able to get about 1000 pf these packs because no else knew what they were worth

[@rjbass338]

whoa I saw a few pallets of scooters, when those getting listed?

[@adamgh0]

It's like the underpants gnomes from South Park. Phase 1: Collect modem batteries to build battery packs. Phase 2: ? Phase 3: Profit

[@jozefbania]

Good you can recyle not shred it all like amazon with their 'hold the price destroy the surplus' method.

[@michaelpotter6542]

could you just leave them in the pack and wire them up with out removing them?

[@jehugarcia]

Maybe

[@kjm-ch7jc]

Do you really use a hammer to open the packs ? also what happens to all the plastic cases and circuit boards ?

[@jehugarcia]

Recicle them

[@JAC13]

just slice the sticker in half and then take vise grip pliers on the end with the connector and pull apart, easiest and fastest way to do it.

[@maxpower9340]

I cant find a source of cells in UK unless I purchase them new

[@jehugarcia]

USA is awesome

[@clixium]

There is company in Italy that resell used 18650 cells, price per cell is 1 euro or less depending of capacity 🙂

[@lineagerevolutioncaranay]

the shipping is not available in my location

[@jacek-jan]

Contact some people in local electronics recycling company. They should have thons of cells. This from old laptop that reached cycles limit are usually like 80% good.

[@sreekumarUSA]

And free, that too.

[@phillipsmiley5930]

@@sreekumarUSA I pay a £1 a laptop pack, on average 4 out of the 6 cells are reusable

[@johnny555]

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.

[@IrishSpyHD60]

Kind of like a scaled up CPU delidding tool would be nice

[@jamesfernick3741]

my initial thought was "i would use a bench mounted vice like a nutcracker, much less likely to impact the cells within"

[@RubberSalt]

Lotta steps that a blade and hammer covers. Skills and sense are a requirement for this method I suppose.

[@JAC13]

just slice the sticker in half and then take vise grip pliers on the end with the connector and pull apart, easiest and fastest way to do it.

[@Searinex]

Dam, I was going to buy some but they don't ship out side the USA.

[@datboisxe]

what recycler is this, I'm looking for one local to me but I can't seem to find one.

[@playerroblox15]

I can't make the purchase from your site, it gives me as a problem (The shipping rates for the selected location could not be gathered). I live in Italy

[@KoaBosk]

Serious question here how many of these batteries would I need to make my own electric vehicle that would be equivalent to a Tesla or at least ~400 miles?

[@KoaBosk]

I did some more digging and found that the Tesla Roadster has roughly 6800 batteries, I'm not sure if that was the original Tesla Roadster or the new one. So we would be looking at about $4,000 give or take for just the batteries

[@wolfeatsheep163]

Thank you for the info

[@tihspidtherekciltilc5469]

If I'm not using my cordless tools for months or longer should I discharge the batteries by using the tool until one bar is lit? I'm guessing I'm not supposed to keep them charged until use?

[@johncoops6897]

Not necessary. The whole "Storage Voltage" thing is a lot of "Urban Myth" anyway, propagated by the RC fools (they are like AudioFools, but with RC). One BIG danger with power tool batteries is that the BMS is usually only powered from one cell, and continuously draws current. So if you bring them down to a low state of charge then store them, you face a HUGE risk of that one cell going under-voltage. If that happens, the BMS may lock it down and make the whole pack unusable. This is very common with Ryobi, but other packs also do it too. Bottom line... store them fully charged, never store them at a low charge.

[@tihspidtherekciltilc5469]

@@johncoops6897 I really appreciate you taking the time to answer my questions in a way I can understand.

[@GodmanchesterGoblin]

Safest long term storage for Lithium cells is typically at around 35% to 40% of charge. That is how they are shipped from manufacturers since they then have the longest shelf life. You should avoid a deep discharge, since any further self-discharge can take the cell down to a voltage where it will degrade. Conversely, high voltage just puts stress on the cell which will encourage self-discharge anyway, but cells will not self-discharge equally. At 35 to 40%, most cells will stay very close to that voltage for months or even years.

[@johncoops6897]

@@GodmanchesterGoblin - that is technically correct, however this is the real world and not a text book or online forum. The issue with power tools is that usually there is a BMS that's drawing voltage continually from ONE cell, so no matter what the consumer does, the cells are being "actively de-balanced" over time. Worse, the packs and chargers provide no way to (automatically) control the charging voltage, and the "power level" LEDs have crude circuits that may or may not reflect anything logical. So you'd need to use external measuring and charging devices to bring the pack into a "35 to 40%" charge... and what exact voltage should the consumer choose anyway? Furthermore, power tool BMS and chargers almost universally don't have any balancing whatsoever, and only a few have top balancing (float/soak charge disconnect of individual cells). The only thing they almost all use is a cell voltage detection that fully disables the whole pack if any one cell goes under-voltage, and this commonly renders the pack un-chargeable. So with one cell being continually discharged, any imbalance will get magnified by the inherent charging systems that they use. It doesn't matter how nicely you look after the voltage of the whole pack if one cell is low. Anyone who harvests cells from tool packs (like me) knows that it's almost always only one dead cell (or pair) that's killed the whole pack. So, power tools are nothing even slightly like Radio Control packs or individual cells. Generally, the best thing is to store them with a high state of charge, and never EVER store them when they are low or fully flat. For long term storage, top them off every few months to prevent deep discharge of that ONE cell that powers the BMS. Overall, you are probably better off simply using the tools periodically rather than storing them for long periods - the packs don't usually die from over-use... it's storage that kills them. Personally, what I do is open the packs and manually top balance each cell (or pair) by individually charging them. This rebalancing once or twice each year makes a huge improvement to overall health of the pack.

[@GodmanchesterGoblin]

@@johncoops6897 True, and I know all that - I have spent years working in the consumer electronics and industrial electronics industries, and you are right - one low cell in a series chain causes problems where there is no proper cell balancing available. I wanted to move away from the "urban myth" cited above, since correct storage condition is nothing to do with urban myths, and I have no idea why RC cells are being mentioned here. I would agree with your final paragraph - in the case of power tools, in most use cases it's better to use them and keep then reasonably topped up. If they sit languishing in a shed for six months of the year that's generally going to lead to an early demise.

[@plasmaman9592]

You sure have been given the wrong information. I have had several different cable modems with the landline connected to it with battery holes but Comcast does not even sell the batteries for them and does not offer them in any way shape or form. They told me if I want one I have to figure out where to get it on my own. Also I got rid of their equipment and bought my own equipment which is a different brand and it did not come with a battery either.

[@jehugarcia]

Yes, there’s millions of these available because they don’t come out modems in homes. Just because you’ve never had one doesn’t mean a lot of people have.

[@sujanthemagarrhein3061]

If you using the batteries only, can i get the boards you not using. Thnx

[@mcg6762]

Why bother with 18650 anymore when LiFePO4 is so cheap? You can build a 12V 280Ah 3.6kWh battery for maybe 800 USD including BMS.

[@edbrackin]

LOL, When the video started my thought was, who at the end of 2021 is going to all this effort for 18650 cells.

[@DocM221]

I bought 40 cells as well! I got lg cells though. Not complaining just saying

[@4sp3ro]

where is the thermistor in your system?

[@greggv8]

Why not build a power wall using the battery packs as-is? Use 4 cell and 3 cell batteries together to get the 7 cells. They already have built in monitor and charge control circuitry so a wall unit would need a way to read the data from them. It could identify bad batteries so they could be swapped out. Don't know how much $ all the connectors would cost.

[@kasuraga]

honestly, based on the cells in them, they're only rated at 5 amps. that's not very good. They're good for some uses, but they really can't push more than 20w per cell. They're cheap for a reason.

[@tahoma6889]

@@kasuraga Cells are combined to addresses application. Example... Say 8 cells, wired as two batches of 4 cells. 4 cell batch wired parallel. Those two batches are then put in series, doubling the voltage.

[@kasuraga]

@@tahoma6889 5 amps is still not a lot of current. but for the price, it's to be expected. I primarily use 18650's for regulated vape mods that push over 100 watts. They're useful for powerful flash lights too. Sure you can run them in series parallel banks to get more voltage and current, but that also increases the packaging size.

[@docmcstuffins3424]

Can we get a native 48v circuit board system, feel it would help with the amperage limits to 24v has

[@jehugarcia]

What amperage limits? You can get any power level out of a 24v battery pack if you build it correctly

[@docmcstuffins3424]

@@jehugarcia I thought I saw your original video for the cell holders that they had heat issues over a certain amperage, I could be mistaken it was a while ago.

[@МихаилСеренко-б4з]

Здравствуйте. Вы продаете эти батареи на Ebay?

[@101perspective]

I must be too cheap because I've never owned a modem that had a battery backup in it. I didn't even know such a thing existed.

[@james10739]

It might depend where you live most the ones from your ISP have a spot for them but they generally don't populate them but if you buy your own Netgear or Motorola they generally don't

[@BushidoBrownSama]

It's the voip modems that have them

[@patprop74]

Generally, they are not from modems for say, rather from Cable Companies box that supplies you with a phone line.

[@mawizard6341]

Most modems don't have a battery. Only modems that support analog phone lines which is basically the supper crappy modem the cable company gives you after they swindle you into getting a land line that you'll never use and unplug because the only calls you get are that your call warranty is about to expire.

[@whydotufaqoff]

We dont have batteries in our modems in the uk...😳

[@johncoops6897]

That's because your land-line telephones come in a separate copper line. In many countries, the copper is used for a modified ADSL (Fiber to the Node) and the phone is then connected off the modem (rather than an ADSL splitter). In America it's usually Cable (RF) modems with the phone plugging into there, and there is no longer any copper phone line like you have - hence no way to use the phone if the modem is un-powered.

[@whydotufaqoff]

@@johncoops6897 Fair enough...thanks for taking the time to explain...Cheers 🍻

[@sttm1283]

where to get the pcb?

[@parfyparf7807]

You're sold out of most of the kit. Any idea when you will have them back in stock?

[@noelsnave9395]

Thats sick af. But be careful with the battery wall. It only take 1 explosive battery to burn your house down.

[@joran4612]

Do u know who ur talkin to?, Also its pretty hard to blow up a lithium cel if u have a proper bms

[@noelsnave9395]

@@joran4612 well after checking his channel i think he knows what he is doing lol.

[@MirkoM2425]

Was expecting 18k batteries extracted. My disappointment is immeasurable

[@gruefy]

Your disabppointment is measurable: 17.992 batteries although it is kind a funny unit of measurement ;)

[@robopam]

I'm looking for a portable power supply like Jackery or Bluetti but the prices seem so high.

[@LukeLiveforphysics]

If you ever do EIS in a cell that has sat at a high SOC% for a few years (cycles or no cycles), you would never recommend people use old LIBs again.

[@ItAintMeBabe99]

I guess I’m probably the only one that doesn’t know what EIS and SOC and LIB are !

[@francovanmarrewijk]

@@ItAintMeBabe99 I'm guessing lib is lithium ion battery but the others go figure haha