Beginner’s guide to building safe 18650 batteries

День тому

Re-upload: This is a re-release addressing early feedback from the original video, in which I referred to all of the lithium batteries as Lipo, even when 18650s are most commonly Li-ion in chemistry. Pictured in the video and linked in the description was a website about the differences between various lithium batteries, but clearly me constantly using the term Lipo was confusing and misleading. Therefore, I present this minor edited version to correct the problem. My apologies for the original error and I hope this tweaked version can be the informative video I originally set out to make.
Last year I discovered the world of custom 18650 battery building. You take li-ion cells, new or recycled, and build a battery to your exact project specifications. There’s a lot of conflicting information out there and many potential safety hazards. In this video I compile many weeks of research into an introductory guide for building batteries safely.
Please pay close attention to the safety warnings and tips in this video. Always consult a professional, not just onlines videos and forums, before building a custom battery. This video is solely intended to get you up to speed before you check your plans with a professional.
In a future video, I will be building a high voltage, high current custom battery to power a small EV.
0:00 Introduction
0:51 What are 18650s?
Tesla 18650 battery: www.evwest.com/catalog/produc...
2:04 Voltage, current and capacity: series vs parallel
Lithium battery FAQ: www.batterypowertips.com/diff...
4:39 Example battery calculations
Battery calculator: power-calculation.com/battery...
7:28 How to shop for 18650s
How to spot fake VTC cells by Mooch: • Minding Your mAhs Ep02...
Tech Around You in Aus (recommended by my personal experience): www.techaroundyou.com/
Second Life Storage cell database: secondlifestorage.com/index.p...
10:15 Testing and managing 2nd hand 18650s
Opus charger: amzn.to/3EOQ43S
Repackr website: www.repackr.com
11:09 Building battery frame
Modular cell holders on Amazon: amzn.to/31u6rFs
Example cell holder on Thingiverse: www.thingiverse.com/thing:145...
11:44 Nickel joining strips
How to identify pure vs coated Nickel strips: • Voltlog #227 - Identif...
Matador’s nickel strip rating chart: endless-sphere.com/forums/vie...
12:54 Spot welding the cells together
K-Weld spot welder: www.keenlab.de/index.php/prod...
14:41 Solder/spot weld less option: VRUZEND
VRUZEND weldless 18650 kit: vruzend.com/product/vruzend-b...
15:08 Balance leads, terminals and charging
Rosin flux paste: amzn.to/3FYuLhJ
Fish paper: amzn.to/3mTsVXO
Kapton tape: amzn.to/31s8Znx
17:31 Finished 3D printer battery
17:51 BMS - Battery management systems
Daly BMS website: dalyelec.en.made-in-china.com/
18:41 Conclusion
Previous portable MPMD video: • Portable 3D printer gu...
Endless-sphere forums: endless-sphere.com/forums/
Reddit 18650 sub: / 18650masterrace
Buy quality and affordable filament from X3D. Buy 3, get 1 free and a free sample pack with every order: www.x3d.com.au
Get Quality Resins from 3D Printers Online. 5% off storewide for Teaching Tech subscribers [Code: tech5]
3dprintersonline.com.au/
Take a look around and if you like what you see, please subscribe.
Support me on Patreon: / teachingtech

КОМЕНТАРІ: 262

@zuluDhillon 2 роки тому

Sir, you get a thumbs up from me for reuploading with corrections.

@TeachingTech 2 роки тому

I'd rather admit I stuffed up than leave the video like it was.

@oleg146 2 роки тому

@@TeachingTech wow, this is a special kind of dedication to what you doing! I absolutely respect it! 👍👍👍

@T3chWarrior 2 роки тому

@@TeachingTech thanks for the video, maybe soon also look in to lifepo4 cells and pouches. different voltage range from liion and lipo, but significantly more charge discharge cycles

@ARepublicIfYouCanKeepIt 2 роки тому

Great video Michael. Three suggestions, if I may: 1. Even new, lithium batteries must be fully charged, either individually or in bulk as a parallel array. Once 100% state-of-charge (SoC) is achieved, cells must be assembled into their final arrangement, then top balanced (charged to 100% SoC using a BMS with balancing capability, or a balance charger). Regardless of even measured capacity, bringing all cells to 100% SoC in unison ensures the maximum capacity of the final pack. Otherwise, the cell group at the lowest SoC (regardless of voltage) compromises the entire pack. 2. Regarding charging and discharging, a universal rule of thumb to maximize the longevity of battery packs is to charge and discharge at 0.3C. To explain for your viewers, C stands for capacity. For example, a 2,500mAh cell's 1C rating is 2.5A. Therefore, 0.3C equals 0.75A, or 750mA. Charging and discharging at this rate ensures the safety of the battery pack, as well as it's longevity; easily extending its life by 3x to 5x. While it's acceptable to "push" a pack to the cell rating, it's best to do so infrequently and for only brief durations. So, assuming 2,000mAh nominal capacity for your 6S7P pack, (2A*0.3C)=0.6A*7P=4.2A without ever coming anywhere near your packs rating. Likewise, using these figures, your pack should be charged at 4.2A or less, recharging from 0% to 100% SoC in roughly 5 hours. So, 5 hours charging for 8 hours work. Not a bad bargain. 3. To maximize cell longevity, it's best to stay away from the "knees" of the power curve. There's only a negligible amount of capacity to be gained, either by discharging after the knee in the discharge curve, or by charging after the knee in the charge curve. Unfortunately, most low cost BMS boards will charge right up to the top and cut-off right at the bottom. So, to operate within an alternative band as I suggest, a programmable BMS is required. This is a no-brainer for larger packs. However, it just doesn't make financial sense for relatively small packs. As always, thanks for all the great content that you create and share.

@seejj 2 роки тому

This is perhaps the greatest youtube reply I've ever seen. Honestly. The video answered just about every question I had with building a pack.. except the BMS! This covers that, as well as gives constructive crit all around. I'm literally copy/pasting this. thank you John Coloe, AND TEACHING TECH!

@ARepublicIfYouCanKeepIt 2 роки тому

@@seejj Thanks Chris. It's good to hear that some of the learnings I've acquired through long experience benefits others. I only touched on BMS's in my comment. Honestly, it's a subject for its own video. Perhaps Michael will create and share covering this important topic. In the meantime, if I can ever be of any assistance, please don't hesitate to reach out. My e-mail address is my first.last at Google's e-mail system. It'd be my pleasure.

@ElectricBikeLaboratory 2 роки тому

Fantastic info here !! Well done

@jameslmorehead 2 роки тому

I was going to come down here in the comments to talk about this as well. It is of utmost importance that all batteries in series are charged to a storage voltage before being welded (3.5 or 3.7V choose one and charge everything to that voltage)). If they are not the exact same voltage, when you weld them in parallel, the higher voltage cell(s) will short out into the lower voltage cell(s). You run the risk of creating a thermal runaway. If you look at how most manufacturers assemble 18650 packs, they either cut the strips long where soldering is required, or they add a short strip specifically for soldering. The welded strip takes more time, but is the safest route as the welded joint has a much lower thermal conductivity than a solid strip does. But, a welded connection also does not have the current handling capacity that you get from leaving the strip solid. Which way you go really depends on the power requirements of the soldered connection. Using the previously described charge rate of 1-2C, a welded connection is more that sufficient for a balancing connection. However, the primary output of a pack drawing 10+ amps might be too much for a single welded joint. This is where leaving the tab where the final parallel stage is welded to the pack a bit long would be the better solution. Soldering to a tab like that would give you the lowest resistance to your pack. Personally, I can't wait for the 4080 LiIon cells to become more popular. They are the most exciting technological breakthrough in batteries since LiPo packs became popular. They get the capacity and discharge rate of a LiPo, but with the safety of a LiIon. It's the best of both worlds.

@MrMikeyPayne Рік тому

Wow! Great video...now this great comment. I am hoping he will make a thorough video on charging/discharging if he has not yet. I agree with the commenter that stated: "This is perhaps the greatest youtube reply I've ever seen. Honestly."

@bhikramseth Рік тому

Finally someone who makes sense. Of all the videos out there yours is the best hands down! Thank you.

@adrianrolfe3821 Рік тому

This is hands down the best tech instructional video I've ever watched. Thanks!!! Comments are extremely informative as well! Cheers!!

@AerialWaviator 2 роки тому

Excellent video. One of the most informative and complete Li-Ion battery DYI building videos I've seen. Has most key points someone just learning need to know. Terms and sources so they know enough to search additional information. One point that might have been mentioned in more detail, when using reclaimed cells; is cells below 60% of new capacity should be avoided. They can't supply as much current and will reduce average cell capacity in the pack. Better to use cells as similar as possible. Best is all cells same (like if new from same manufactured batch), but this has substantial added cost. Before beginning to assemble cells together, a final check should be made that all cells are charged to nominal voltage (3.7V). Cells that are at different voltages will quickly try to self-balance, and this can cause them to emit excessive currents (aka sparks). Particularly joining in parallel (+..+, -..-). Once within ~0.1V of each order connecting together should go smooth. The K-weld is one of the best options. Being DYI kit, price is reasonable for a quality tool. Cheep (low priced) spot welders should be avoided as they do poor job of managing energy used in welds. When spot welding cells, it's better that they at nominal voltage (3.7V, or slightly lower, but above 3.0V) vs fully charged (4.2V). Should something go wrong, cells having much less energy will have lower potential to cause damage. A bucket of water nearby can act as safe zone/net (for just incase). If you first pack build, try a 3-6 cell (at most) pack to test and home your skills. Making a mistake on a smaller pack will have less risk (less energy). Still need to take all cautions mentioned. Just take you time and don't rush anything. :)

@StormBurnX 2 роки тому

Immensely useful video - I have like 5 salvaged electric scooters that all use massive packs of LG 18650 cells. Literally sitting on dozens of them and have no idea what to use them for or how to safely use them - this will be such a great vid to keep in mind.

@beez1598 2 роки тому

Dang those were good salvage finds!!

@StormBurnX 2 роки тому

@@beez1598 I used to do mechanic/charging work as a contractor for Bird and they "retired" (disabled/recalled) a certain problematic model in my division and required that we ship back any that we picked up so they could be destroyed but the cost of shipping a giant scooter was higher than the reimbursement we would receive so me and every other mechanic I know just scrapped them ourselves. The parts aren't usable cross-model and the scooter had it's folding hinge removed (and then riveted+welded into place) so they weren't even useful for refurbishing, plus the brains were removed and replaced with a Bird-made chipbox that was remotely locked out. Between myself and the other mechanics in our decision I have no idea how much electronic scrap we saved from landfills but I've got a few scooters' worth of hub motors, battery packs with built-in BMSes, and a bunch of probably useless aluminium frames, so at least I can use the batteries for something now :)

@terrydaniels9573 2 роки тому

If you have enough, you might look into building your own "power wall" that charges either via solar, or charges via house power during non-peak times, it can then be used during peak time to save money on your electric bill. I'm not an expert on this, but plenty of people on UKposts are.

@StormBurnX 2 роки тому

@@terrydaniels9573 I probably only have around 35-50 of the individually cells - not enough for a proper house power pack, BUT with that said there is a slim chance I'll end up in an RV/camper type living situation within the next 5 years so I would benefit greatly if I used them there :)

@beez1598 2 роки тому

@@StormBurnX that’s really cool, thank you for sharing that! Thank you for taking the time to do this and at least take a few environmental hazards out of the system. I used to work In IT and would do the same with laptop batteries, and e waste . my manager wouldn’t pay to dispose of them proper so he would just throw them in the dumpster. I tried to sell him on having a salvage company come every month for free of course but he maintained it didn’t matter much since “a few hundred batteries a year aren’t going to make or break the environment.” Technically correct I suppose, but still a crappy take on the issue.

@blackwolfecc 2 роки тому

Timing on this is perfect! I’ll be doing something similar to this for a super racer that will be going into my rv. I don’t want it drawing power off my primaries, but I want to be able to charge it either when a generator is plugged in, solar, or the truck. Excellent video! As always :)

@just_russ4633 8 місяців тому

Best video of battery building I have seen. So informative. Thank you.

@ISurLee Рік тому

I can only understand 50% of your contents, it look like my knowledge haven't reach the level of making my own lipo battery yet. Thanks for saving my day! If i made mistake on this project, i could end up wasting lot of money!

@louis-ericsimard7659 2 роки тому

Finally, clarity in explanations ! Thank you !

@piotrpolska1666 2 роки тому

I really like your channel. You are going so deep into each topic. Great knowledge and skills.

@jsteph6965 5 місяців тому

Thank you for explaining in such detail. Very well done. First time I donate on UKposts. Very impressed

@StubbsRC Рік тому

13:37 seeing be battery wires jump from the current coming through 😳 nice video!

@MisterkeTube 2 роки тому

Just a thought: why not have the wires attached to short Ni strips before getting them close to the batteries (when heat from soldering is not a problem and even drilling some holes in the strips to have the leads go through would be an option) and then just spot-weld those strips to the battery-pack? Avoids getting dangerous actions close to the batteries.

@Yosomy 2 роки тому

I've always wandered the same question, buy nobody does that, EVERYBODY does it like in this video and I really have no idea why..

@22Tech Рік тому

ooo that's a good idea

@nigelholland24 Рік тому

What a absolutely brilliant video learned so much as a just getting into 18650 batteries thank you

@gusty2333 2 роки тому

Thanks for making this guide, I was wondering about this for a while now

@matthewweinberger7023 2 роки тому

Wow that was quick, thoroughly enjoyed and as usual oddly convenient timing

@smellycat249 2 роки тому

Ditto

@leroy111007 2 роки тому

Thank you for creating this amazingly detailed video

@markrobinson9876 Рік тому

Best video so far! As other videos just tell you what they are doing instead of explaining where everything goes....until 14.35. Then the rest was over my head! This was the bit I wanted to learn. Can do the parallel connections, but where does the series go? some gaps and not connected? Serial connections on 1 side, not the other? Where do the charging plugs connect? which wire goes where?

@guerriclc7659 2 роки тому

Thank you for your work ! Have an happy new year 2022 !

@gideonlapidus8996 9 місяців тому

Love your video, basic math, and lots of common sense

@TCHamilton56 5 місяців тому

Thanks Michael - you've saved me / taught me so much - most grateful for your well thought-out video helps. Best of the season to you + thanks again😀

@MrRickvanwinkle 5 місяців тому

Your getting a big thumbs up from me buddy, that was such a great detailed comprehensive video. I learnt loads , cheers buddy

@RestoreTechnique Рік тому

Total battery newbie question; you say 22.2V is suitable for your 24V needs? So the printer will still work when the batteries discharge, and they're only providing ~20V? I want to make a 12V battery, as was wondering if i needed to make mine 3S or 4S 🤔

@replacesoundboard 6 місяців тому

Thanks, you just convinced me that I cannot improvise myself as a technician on the go, even if the idea of making my own batteries sounded really neat. At least now I have a better understanding of how these things work.

@Dowent 2 роки тому

I'd love if you'd also do this in-depth video on various smart chargers and discharges, as well as the different kinds of BMSes, including ones with bypass, programmable, etc.

@originaltrilogy1 2 роки тому

I've been wanting to make a battery to replace the one stolen from my e-bike. It's 18V, so this has been helpful.

@avejst 2 роки тому

Great video as always Good walkthrough of the process Thanks for sharing your experiences with all of us :-)

@oceanz55 2 роки тому

FANTASTIC Video! Thank you so much for this wealth of info!

@jpcme2002 5 місяців тому

best video on this subject!!! thank you very much!!!!

@Enigma-Sapiens 2 роки тому

Great video and awesome information, thanks, Michael!

@sonyyoung1036 Рік тому

Best video I have seen. Educational. Thanks

@Aengus42 6 місяців тому

Just what I needed. Nice one mate!

@kurtXhecticXpl 8 місяців тому

Great video. Thank you.

@Angelo_Aus 2 роки тому

As always love your work 👍

@giovi727 2 роки тому

Thank You for sharing this knowledge!

@i_Hally 2 роки тому

So clear and concise 👌🏼

@MrMikeyPayne Рік тому

Awesome video! The only area I feel grey on after that is the overcharge and drain protection. I hope you will do a detailed video on that if you have not yet. I just liked/subscribed.

@auxlabs5228 2 роки тому

Great video, any possibility of releasing you cad files for the battery holder and printer base?

@serverguy007 Рік тому

This is a very helpful video clip, Thank you so much! :)

@ericokoth3218 Рік тому

Thanks for this video. Applying immediately

@dogbog99 Рік тому

Superb video, thank you. More content like this please 🙏

@brians7613 11 місяців тому

😊 thank you your video did make it easier for me to understand

@norm1124 7 місяців тому

Amazing Project ❤❤❤

@priezti 2 роки тому

After having an 18650 go thermal runaway on me, I applaud your courage to work with them, makes me uneasy just watching it, waiting for the isolator ring to fail..

@ericserafim7954 2 роки тому

Tons of information!

@rickyseddon4786 2 роки тому

I love your work this is beautiful

@IVAN_ENT 2 роки тому

Nice edit so fast i was a little distracted watching the original haha I use both lipo and li-ion, currently building my first ebike atm with a custom aluminium box and a 14s5p pack with 21700s giving 52v 1.2kwh for a bbshd motor 😀

@judkins53 3 місяці тому

Fantastic video! Thank you very much!

@olivercouch1651 2 роки тому

Great video, one big thing missing is how to deal with a battery fire - bucket of salt water. Also, do it somewhere that's ok to burn, and with plenty of ventilation. HF acid is nasty!

@friedrice5292 2 роки тому

Hello Michael. Thank you for sharing this awesome video. I learned alot from it. Quick question to ask. I am new to RC Car and I had acquired some 18650 used batteries a while back. I would like to use them (make some myself) on my RC car which currently came with a 2 cells batteries in series (7.4v 1200mAH). Question 1: Can I use the same charger that came with RC car to charge the 2 cells that I am going to make? Question 2: If not, what kind of charger I do need to buy to charge the new made batteries safely? Question 3: What your recommendation to do to use previous used 18650 batteries for the RC car? Thank you in advance. :) Jack

@eidodoos 5 місяців тому

thanks for sharing. need more videos about battery

@NGYT40 Рік тому

Amazing piece of information!!!!

@nevilenobody606 11 місяців тому

Great video thanks! Do you still recommend the Melbourne supplier you mentioned in the video? Their prices seem quite reasonable for bulk purchases of new cells.

@ckupcu Рік тому

Very good video - great job!

@DennisCrawfordJr 6 місяців тому

Thanks. I'm looking to add a rechargeable battery for a led sign. Is that a good option?

@isaganivallesteros5149 8 місяців тому

Is it safe to use my old BMS that runs 10s4p rated at 10Ah on a pack that will be rated at 14.4Ah? Note my old pack used 40pcs LG rated 2.5Ah. I am planning to replace them with 40pcs Panasonic rated 3.6Ah each. Thanks to or your patience and reply.

@SharkyMoto 2 роки тому

another thing to consider is chenistry so for example if you take samsung inr25r (wich they use in hilti powertools) those are actually designed and tested to fail in a safe manner - meaning they short circuit them and they cant blow up, explode, burn or anything, they just remain as they are but are broken afterwards. on the other hand, many cheap noname cells are much more dangerous and actually can explode, so its important to know the chemistry of the cell you are building with too :) also there are very well cells that are optimized for both capacity and drain, like the LG INR HG2 wich has 20A continuous discharge while offering a serious 3000mah capacity. as a long term e cigarette user, i know a lot of 18650 cells and their capabilities :)

@itaco8066 2 роки тому

Great & awesome video!!

@Mobile_Dom 2 роки тому

i would have loved to see you replace the 12v heated bed (which was woeful anyway) with a small circular 24v silicon one from keenovo

@WinstonFanWin 2 роки тому

Hi there, thanks for the great video~! I saved it to my collection. Just 1 question: after we have the wires for balanced charging, where do I connect the terminal(which has the wires for balanced charging) to?

@richardnixon5555 Рік тому

They go to whatever BMS you're using. It was briefly mentioned in the video at ukposts.info/have/v-deo/rHuYYaCAqaiQq3k.html and ukposts.info/have/v-deo/rHuYYaCAqaiQq3k.html

@Nevio_024 11 місяців тому

Great video! Can you please share the STL for the Monoprice mini delta battery?

@TeachingTech 11 місяців тому

Here is the link to all my source CAD. you ca right click and export anything you want without an account: cad.onshape.com/documents/9f854275c67d8537da0d456f/w/109f792ba2c59fcde9545aaf/e/dca48bb26248603c97da2165?renderMode=0&uiState=6487b579b622966de0c31157

@Nevio_024 11 місяців тому

@@TeachingTech Thank you so much Michael!

@MooseKnuckleWarrior Рік тому

I wonder if this fella talks to his homies with the same 2 tone up to one tone down to finish each sentence 🤔 I would love to see a video of him telling an epic story to his bros while keeping the same tone as these videos 😆 That would be pretty great. Informative video anyhow. I done learnt me some good book learnin

@reubenrichardson4669 2 роки тому

Bloody great video

@VinnieVega76 Рік тому

What was the brand of the 18650 balance charger? Also, should I use the drain cycle before a full charge?

@paulhack893 2 роки тому

Ah yeah. Hes got the kweld. The us reseller is a friend of mine. Real good dude

@Mitch3D 2 роки тому

I built a backpack 3D printer with a small delta printer, I used a battery alarm so it would warn me of overdischarges but I didn't use a BMS. The best solution would be a BMS that could activate power recovery on the controller board before the voltage drops so you don't ruin your print and batteries on discharging.

@oofunstuff 10 місяців тому

That charger you mentioned is no longer available on Amazon. Can you recommend another?

@dodits1665 Рік тому

Can I build a pack with some are different in amperage? Reason being I have some salvaged 18650.

@lafields86 3 місяці тому

@teaching tech, any possibility you'll release or share your .stl files for the 3d printed additions so one may build off of what you started?

@wolfrig2000 2 роки тому

Fun fact, the first time I picked up an 18650 I wanted to know what voltage it was, set my meter to 12V DC and touched the leads to both ends and immediately it got extremely hot and burned my fingers. That's when I went on Google to find out why and now I know much more about these batteries.

@Kalvinjj 2 роки тому

Sounds like forgetting the leads in current mode, that's pretty much a dead short on the meter.

@user-fs7tb8xr9v 3 місяці тому

thanks, what abut LiitoKala Lii-M4 18650 Charger ? is it good?

@blessedekem-dadzie9622 Рік тому

Can I use any type of lithium battery to build a battery pack. I mean battery with different amps

@izsakitt3711 2 роки тому

Great. Note, capacity (watt hour, Whr) increases for serially connected cells just the same as for paralleled cells. Doubling the voltage, doubles the capacity of a series connected pair relative to a single cell.

@1queijocas 4 місяці тому

that would be energy (Wh), capacity is different (Ah)

@marcosramirez385 2 роки тому

Are you going to do an update to the Delta Mini? I’m planning to convert my delta mini to 24v, replace the hotend, replace the bed with a thicker plate, install a 24v bed heater, get rid of the bed leveling switches to replace with a probe, maybe magnetic klicky and enclose it to have a portable abs printer.

@MrBaskins2010 2 роки тому

my bed leveling switch broke on one corner. you know what size would be the proper replacement?

@KieranShort 2 роки тому

You show pics of both Li Ion and LiPO4? What's the difference and requirements for charging and bms?

@markoantesic4362 2 роки тому

At 3:31 its a bit misleading to say that no capacity is added. Each cell is cca 9 Wh. Look at it this way, adding another battery in series will make the mAh stay the same, but will boost the voltage form 3.6 to 7.2 V and P=I*V. Describing battery pack in Ah needs to die. Like all the ebike resellers say, we has a massive 10Ah battery pack (...at 12V) not like those other guys who have a tiny 5Ah pack (...at 24V) XD

@T3chWarrior 2 роки тому

agreed, KWh along with the sustained and burst currents is what needs to be used

@drabberfrog Рік тому

Yeah, the capacity is determined by the number of cells you have, not if those cells are in series of parallel.

@OneDollarNoHoller Рік тому

Excellent!

@truetech4158 2 роки тому

Well said. Yes, if the goal is to not get her to run hot, then nickle should be placed on the knees of the connective points.

@stevenrobertson7069 3 дні тому

Good video brother ⚡️👍

@prawny12009 4 місяці тому

When building a battery from salvaged cells is it necessary to match resistance and capacity to ensure all cells charge in a similar time? I've seen some cells take way longer to reach full charge than others using the same charge even though they started at a similar voltage. Edit: watched more of the video and saw you use vastly different capacity cells Is this not asking for trouble? If a cell set drops voltage quickly because it is very low capacity will it not trigger the safety shut off sooner than necessary? Or is that what the calculator you used does? Matching the cells to ensure each parallel set has a similar total capacity. It just doesn't seem sensible to me to have cells that vary as much as the ones I saw you using, some looked to have 1/3 the capacity of others.

@hafizmtariq 10 місяців тому

Hi. I have a laptop whose battery is lost and new one is not available. Is there a way that it can be run directly on power bank as an alternative of battery?

@bruceatkinson5357 10 місяців тому

Removed 3 18650 26A, 3.6v, 1300mA li batteries from dust buster. Do they have to be replaced with same battery, or are higher mA ok?

@leroyhileman183 Рік тому

I WANT TO SUPPLY A 12VDC TO AC INVERTER. THE INVERTER WILL SUPPLY 120 VAC. WITH 330 WH. 2.75 AH. CAN YOU TELL ME AM I CORRECT, THINKING I NEED 32 CELLS

@Marcin-fx6hz 6 місяців тому

13:40 that electrodynamic force!

@Godsavethecrumpets 2 роки тому

Why when spot welding are some batteries connected using 2 sheets of nickel?

@brianbassett4379 5 місяців тому

I want to know where I can have high-quality custom battery builds performed.

@PottedPork 6 місяців тому

What was the point of switching the printer to 24V? Couldn't you have stayed at nominal 12V and run 3S (14.7V), or did the custom pack just work out better as a 6S?

@ivanchan6371 11 місяців тому

If it stated 10A continuos discharges mean 10ah issit?

@matebarna7045 Рік тому

Hello. Can you help me If I want to make 70Ah, 12V battery from 18650 battery what I need for it? I like to use for the electric boat engine which is 12V. Thx.

@christopherlynch4347 2 роки тому

Good video

@GiddeonG 2 роки тому

13:36 There's enough power going through the battery leads to move from the magnetic field generated. Fun :)

@embededfabrication4482 Рік тому

I can get a Kobalt 80V 2.5 AH garden tool battery for $150. The 22 cells to make one at 6 bucks each is 140 bucks, if space isn't a consideration isn't this a good option?, I can use 3 in parallel for my application.

@promithasan4881 Місяць тому

What if we connect them in parallel and use a voltage booster to get our desire voltage , in this way we can get more Ah in less money.

@giuseppevillella9445 2 роки тому

Bravo ottimo lavoro complimenti 🤝🔔👍😁🔋

@iteerrex8166 2 роки тому

I’d never make a battery powered printer, but a very nice video for making a costume battery 👍

@emaayan 2 роки тому

Any bms source recommendations?

@koleuslybra 8 місяців тому

Hi all! How to preserve a 18650 for a long time without using it? 80% charge once every 6 months, and store it in dry and room temperature, or fully charge it and leave it for a 1year, or 2? Thank you!

@lucaz219 7 місяців тому

do not store lithium-ion batteries at full charge because the batteries degrate much faster at a full state of charge

@koleuslybra 7 місяців тому

@@lucaz219 thank you so much!

@AIexanderHartdegen 6 місяців тому

@@koleuslybra charge it like 3,2V. Manufacturers do 3,5. Never charge it over 4,2. If you want to use it like military way, charge it until 3,9V for use.