How to build a DIY ebike battery from 18650 cells

Learn how to make your own battery with my book DIY Lithium Batteries: amzn.to/2jbxvzS or check out my second book - The Ultimate DIY Ebike Guide: amzn.to/2BGx4Fn
Spot welder: goo.gl/KN3Uaw
18650 cells (Sanyo GA 3500mah): goo.gl/J6ONJV
18650 cells (Samsung 26F 2600mah): goo.gl/VhpP7T
Nickel strip: goo.gl/VIrNQq
BMS: goo.gl/S6gSQx
Silicone wire: goo.gl/xmpbKD
Black 18650 cell spacers: goo.gl/hQxWF6
Large heat shrink tubing: goo.gl/6v1ow9
Foam sheet for protecting battery: goo.gl/5e71tE
If you'd like a written step-by-step guide showing how to build an electric bicycle battery, see my article here: www.ebikeschool.com/how-to-bui...

[@EbikeSchool]

I hope you guys enjoyed this video. If you want to learn even more, I hope you'll consider checking out my Amazon #1 Bestselling book, DIY Lithium Batteries, available in paperback and ebook formats. a.co/iDtWdPX

[@cringmaster5986]

EbikeSchool.com can you just solder on the nickle to the batteries

[@iMiTREAL]

If you hotglue your cells doesnt get cooled really good and instead tear apart if one battery is faulty. Just think about that option.

[@jakestevens3788]

You r the man......thank you so much

[@hilobob15]

Thanks for your informative videos I just bought a SM8124A internal resistance meter. Many used 18650 cells read around 30 some around 100 or more and the levels seem stable. Many read a rapidly changing reading between 25 and 60 can you give us a video explaining proper expected readings.

[@cheepshotz]

EbikeSchool

[@brunobruno9307]

Friendly advice: Don't do it 4-5 times in a row. Check that video with thermal camera and comparison of spot welding and soldering. Even if you spot weld it gets some heat into the battery. It is better to spot weld once and then move to the next tab and do it in circles. This will give the battery chance to cool down a little bit.

[@themastereal8345]

the whole point of a spotwelder is that it stops the cell from even heating up in the first place, id only do what you said if I was soldering cells together

[@ProCoder119x]

​@@themastereal8345but still need to melt nickel And only till 60c heated cell but still I hope it's better to do like giving gap

[@miker8687]

nah, I worked in a factory spot welding on these exact cells for four years straight in college. You just work on one cell and move one, never in four years was there a problem due to what you're describing. Few small issues were when the strap touched or welded in the wrong spot...keep a bucket of sand near by and a fire suppressant.

[@lcrazyjeff]

dude. LOVE THIS! thank you so much. I want to build a custom electric scooter because everything on the market right now just isn't fast enough for what I want

[@GadgetAddict]

Great video. It was fun watching your spot welder!

[@Rick-gs8pp]

Wow! This is an awesome video! One day when I'm feeling really ambitious I might try this!

[@marsbase3729]

my favorite new catch phrase, "let's get shrinking!" 😂 awesome video, thanks for the info

[@oze-bikes4life663]

Another "great, informative and easy to understand Video" Thanks 😊👍🏼👌🏻 Used a few techniques I learnt from you from your Various "How To" Videos to build my own E-Bike (Mid Drive) & Battery Packs (15S /10P out of Sanyo18650GA Cells) for a Enduro E-Bike BBSHD Build

[@0xXxSiFxXx0]

this is like magic, I loved ur work, the tools the tape the souder ..basicly every thing *--*

[@JELB1960]

Really really really great video. Calm, clear voice with no annoying pretend excitement. I might retire in S. America and, while I love my Haibike MTB, Bosch ebike systems aren't serviced there - I believe. Now I'm confident I can convert a bike to electric and service it myself. Thanks!

[@MrNigel1340]

Thank for an excellent video, this is the best battery build video I have seen yet, was building an electric bike using two bosch 36v three phase motors unfortunately it was fried when my garage went up in flames so will be starting again in a short while, regards Doc Cox

[@rohanvija]

Hi, good content. I used to work for a company who manufactured battery Pack a good way to make sure the solder stays on nikel plate is to scratch it (nickel plate) with a blade, it helps solder stick better.

[@user-oe8xe4og6t]

Congratulations! you have been selected among my few giveaway winners,endeavour to reach out to claim prize....🎁

[@rohanvija]

@@user-oe8xe4og6t hi, thank you. Where do I contact you?

[@igormakritsa265]

Be sure that you have a talent. You explain things in such a way that no questions arise. Everything is quite clear.

[@DavidLorellHoskins]

Great vid. Also, thanks for the DIY kindle book and the low price. I've learned so much.

[@xxwookey]

Nicely done. Lots of useful detail from someone who's clearly done plenty of battery building before. I've been meaning to get a battery welder for a while now. Any particular reason to pick the 787A versus other hardware?

[@thecow123xxx]

Learned more from this video than from 11 years of school

[@ronbrown8611]

where did you go to school

[@thecow123xxx]

Went to a school where I learned that question end with a question mark. You didn't learn that.

[@ronbrown8611]

+Tom Miller I grew up in Antarctica. I didn't learn that in the Icelands.

[@ronbrown8611]

Hi

[@ashtonbeattie8902]

Alex McRae The phrase "would have been" is proper grammar. The phrase "would of been" is not. It is common for people to confuse "would've", which is a contraction for "would have" for "would of", which is grammatically incorrect.

[@mgjr009]

This is an awesome informative video for building a battery pack. Especially for beginners like me. Will be checking out your book sir, such great content!

[@pauloasahi8854]

Thank you so much. This is the BEST and well explained video for a person like me that has only some light knowledge of electricity. I want to build a light kit for my bike to help me commute to my work without getting there with no sweat..... THANK YOU!!! Subscribed

[@hatulflezet]

Hi Mike, Could you do a video about the various BMS's, (smart BMS vs regular etc) and tips about what to consider when searching for one, you know, kind of guidelines for selecting the best one suited to the battery we build? תודה מראש! 😉

[@exgenica]

Just a suggestion to look into using 21700 cells instead of 18650 cells. You get a lot more potential for higher capacity in almost the same physical space...just an increase of 3mm Diameter and 5mm Length for *almost* 50% additional capacity. Put another way, a 21700 cell stores almost as much energy as 1.5 18650 cells of similar construction. Plus, the 18650 cells can have a lower lifetime than the same capacity 21700 cell due to increased stress on the 18650 cell when talking about very high capacity cells. Using 21700 cells may also let you go to fewer batteries in parallel for the same performance. For example, you may be able to use 3p12s instead of a 4p12s configuration. In the 12s configuration that eliminates 12 cells right there for actually a slight increase in mAh capacity. So differences in cost between similar quality 21700 and 18650 cells may become a non-issue in a given application.

[@anonymous175]

Thats rite

[@karlschwab6437]

Wow! Great video; I wondered on how this was done. I am still not ready to do any of mine; I'll send them to you! But, thanks for the great information, I loved it!

[@vsttppqq1]

That was superb demo, beautifully explained n very neat work👏👏

[@ElGatoLoco698]

Ever try moving the spot weld electrodes a little closer together? Looks like they are too far apart causing minor issues.

[@dimik3855]

ElGattoLoco- agreed. It looks like he's got them set as close as this amazing machine can be set at. I would bend them a little closer.

[@electronicshelpcare]

This laptop battery is the best quality, I also made one power bank by using the laptop battery.

[@88ElevenShop]

That's some great content and production value. That kit looks great.

[@SteveBriggs]

Fabulous! really enjoyed the informative demonstration!

[@aaryjan]

To get the best results: as not all cells are created equally & there is likely always small differences in the top village they reach, you should measure a bunch and try to line them up in two rows (in this case) of seven in such a way that both the two rows will show about the same Voltage and then ONLY connect the two rows at the outer polarities (as opposed to, connecting them in pairs of two's all the way). It will minimale the indecency inbetween doubles and on, wherein unequal pairs and so on will drain percents of each other (and be probably only less than 70% efficient in that) from the highest to the lowest of each pair in order to them trying to keep evening out. Connecting two rows of seven apart from each other that way and only doubling up at front and end may save you a few percents of loss after charging.

[@jackdampier9520]

your post is poorly written and therefore difficult to understand.

[@xowaspxowasp5772]

Watching this video has given me the confidence to repair my own e-bike battery when I need to. Thank you 👍👍👍👍😎😎

[@barryphillips7327]

very good video very informative, looks almost like a bought battery pack, that spot welder is impressive too!

[@filip3148]

you should make more videos. this is incredibly helpful to people!

[@EbikeSchool]

Thanks! I've got a few more coming, don't worry!

[@tamirdahari8041]

Please do a video on how to build a 36v 12a thx bro

[@EbikeSchool]

I've got a video upcoming where I increase the voltage of a 24V 20AH battery to 36V 20AH by adding cells, hopefully that will be helpful for you!

[@filip3148]

Keep em coming! :)

[@frozenprakash]

Power = Voltage x Current W = 3.7V x 20A W = 74 Energy = Voltage x Current x time W time = V x I x time W hour = 3.7V x [3000 mAh] W hour = 3.7V x 3 Ah Wh = 11.1 That simple. And for reference, 1000 Wh = 1 kWh [1 Electrical Unit], which is what our kWh energy meter uses in home ________________________________ mAh and Ah which are seriously flawed unit (which doesn't take voltage into account), which is normally used by manufacturers and marketers to misguide people !! Professional and universal unit for energy are, kWh or Wh. I mean, these all of us use kWh meter in home, kWh in Tesla car, and 1000 Wh = 1 kWh. (how else simple do you want ??) Still people use mAh and Ah, wonder how lame can they get !!! And for comparison (different rechargeable battery types): AAA [NiMH] = 1 Wh AA [NiMH] = 2.5 Wh AA [Li ion] = 3 Wh C [NiMH] = 5 Wh D [NiMH] = 10 Wh 18650 [Li ion] = 8 to 13 Wh (high drain to high capacity) 26650 [Li ion] = 14 to 18 Wh ______________________________ Average energy of Tesla battery are around 11 Wh [18650], and to make a Tesla P100D [100 kWh] Model S, = 100 kWh / 11 Wh = 100, 000 Wh / 11 Wh = 9091 batteries or in simple words, 9091 [18650 battery] x 11 Wh = 100,000 Wh = 100 kWh. ______________________________ So i would seriously recommend 18650 enthusiasts to use Wh and kWh [our universal unit] instead of flawed mAh and Ah which are way too childish unit for energy !!

[@jonassperlich7887]

Chandraprakash G f*ck Google, next time I'll ask you haha

[@UrBaNMCPaladinZ]

Thanks for the tip friend. I was searching for this

[@justiceifeme]

thanks for this

[@WHITELIONNYC]

You are the MAN!!! Thanks... 💪🏻🤓🤓🤓🤓🤓🤓🤓🤓🤓👍🏻

[@fseaijaz9960]

Thanks for your teachers research papers

[@richardb.1414]

Amazed about that table top spotwelder, wow

[@tipoyio]

Very nice video! I'm planning to make a electric bike and I found your channel! Really good videos! And you are good on explaining! Keep making!

[@EbikeSchool]

I've gotten tons of questions about where I got these materials. Everything can be found here: 18650 cells: goo.gl/tVjREI Nickel strip: goo.gl/VIrNQq Spot welder: goo.gl/cZS1yC BMS: goo.gl/S6gSQx Silicone wire: goo.gl/xmpbKD Black 18650 cell spacers: goo.gl/hQxWF6 Large heat shrink tubing: goo.gl/6v1ow9 Foam sheet for protecting battery: goo.gl/5e71tE

[@brendanoconnor4802]

Hi will these batteries work, i'm not sure because they are a lot cheaper than the other ones on ebay. www.ebay.com.au/itm/Brand-Tikon-3-7V-Rechargeable-18650-Li-ion-Lithium-Battery-Cell-Fr-Flashlight-OZ-/331328395337?var=&hash=item4d24b61849:m:mrpIJrj1oWd5miqvwQUBOXA

[@richiej6573]

Hi there , Great video I'm planning on building an Ebike and I was wondering if these are a decent battery www.alibaba.com/product-detail/Hot-sale-hight-quanlity-3-7V_60169974596.html?spm=a2700.7724838.0.0.mpG9Mi

[@EbikeSchool]

Pancake - No, I'm sorry but these aren't so good for ebike use. They cheaper chinese cells and are of questionable quality. These work fine for flashlights, but aren't appropriate for high power devices like ebikes.

[@richiej6573]

Thanks for the response but were you referring to the batteries I had listed or pancakes ? or both?

[@EbikeSchool]

Richie, sorry I thought I had tagged that. I was referring to Pancakes. Now I see yours. Those look like either knock offs of Samsung 26F cells (perfectly good but low power cells) or they are genuine but the vendor doesn't have the rights to sell them so they aren't showing the label with cell info. If they are knock offs then they are only as good as the average cheap chinese cell (not very good). If they are genuine, then they are just fine but you'll need to use enough in parallel to cover your current needs since they are low power cells rated for max 5A draw each.

[@andrewmiller6202]

Hey, first off just have to say I've found your video's really informative! Love how they're organized and they've really helped clear up things. Just have a quick question for you: If you're building a 12v battery from the panasonic 18650 cells. Would you recommend using 3 cells for 11.1V? or 4 cells for 14.8V? I know the maximum capacity is 4.2v (which would give you 12.6v for 3) but I'm thinking I should use 4 because that way I wouldn't discharge the batteries as far. (keeping them "healthier") Am I right by going this route?

[@nobleharbor265]

Devices like radios connected to the battery in most vehicles experience a range of voltages. When the battery is charging the alternator maintains the system at about 14.5 volts. With the car off, the battery voltage is 12.6 (when full) At lower voltages, the current passing thru the connecting wires increases. Most devices perform better (cooler) at the higher ranges.

[@bmb49]

wonderful instructional video, thank you

[@goldbunny1973]

DYNAMO TAPE! I remember that. Xmas gift for waking parents at 5.30am click click click!! SO glad you posted this, thanks. Got my bottle battery case,.. arrived with wires cut clean through and no BMS board courtesy of a less than honest Ebayer...but I can now still use it, I hope : )

[@eksine]

I wish you could explain why you have a backwards 1/4" phono plug and a negative wire soldered to the outside of it. I'm not familiar with this connector, but to me it looks like a music plug soldered backwards. Also I've done basic soldering and when you are soldering those wires from the BMS to the nickel strips you will notice it is beading off the strip like water droplets on glass. If you tug at those connections they should come off easy, you're supposed to either use fine sandpaper to rough up the surface or flux. any time I've seen solder look like it's beading off something and it looks like it's having a hard time sticking it means poor adhesion

[@EbikeSchool]

Hi Bruce, what you are seeing is a property of solder known as "wetting", where the solder spreads out when it reaches a certain temperature and adheres to the nickel. It might be hard to see because I sped up the video during the soldering, but rest assured all of those joints were tested and are quite strong. Regarding the RCA plug, it's only a "music plug" if you've got music going through it. Otherwise it's a generic electrical connector. These are gold plated RCA connectors that can handle up to 5A. Other RCA connectors can carry up to 15A. The outside of the barrel on the mono end is negative and the tip of the barrel is positive. This correlates with a standard in the ebike industry for using the center of RCA connectors as positive.

[@eksine]

EbikeSchool.com very interesting, thanks!

[@adonisbernal2637]

@@EbikeSchoolwhat is the recommended charger for this battery pack?

[@luciferknight8224]

would be good to show how to make a charger for home designed battery packs

[@DmitriNesteruk]

Why make you own when you can buy a good one? You only need to do it once. Cycle Satiator is good.

[@weaponmaker14]

Always great content! Learning alot from this channel. Thanks

[@ScottyGolf]

E-Bike GOD!!! Thank you for explaining so clearly. 100% Recommended Video

[@jamesmk2003]

Brilliant. Where can I lend this welding machine? In a library?

[@Deemon1]

easy to find on aliexpress or ebay. also you can do it yourself, search on KZbin - battery solder from microwave oven

[@jamesmk2003]

Thanks.

[@EbikeSchool]

This is where I got my spot welder goo.gl/cZS1yC

[@arad4912]

EbikeSchool.com not available anylonger

[@dalysea26]

AR AD I got mine at m.aliexpress.com/item/1688174875.html on sale for $180, but I haven't actually used it yet.

[@angelhd7446]

Can you teach us how to make a 48 volt battery pack?

[@trustinjesus1119]

Ebike School has a video: DIY 52v 10.5ah lithium battery from a kit Before I noticed that one I saw this video (off to the right) from Rinoa super genius: DIY 52v (48v) 16AH Lithium ion 18650 ... It's so funny because I have a 29" bike I'm having a hard time finding ebike supplies for and just last night I noticed 29"/700c as if it's the same thing and then I saw 28"/700c. Gotta love it. Neobattery is the place to get the batteries from $5 in lots of 40 or 100, they're on eBay and probably have their own site.

[@angelhd7446]

TrustInJesus111 I have 18650 batteries that I took apart from old laptop batteries. I am not 100 percent sure how to make a 48 volt 10 amp hour pack. I have soldering stuff, and spot welder just don't understand the series and parallel yet and how to get 48 volts. Lol

[@memorablename5187]

you just add more cells dude

[@soilworkdc]

26:42

[@Wuety06]

Can u do simple division and round up? 48/3.7

[@34Merlin]

I like learning about this setup and look forward to your next videos and projects would like to see a cargo bike or bike car type deal for those in metro areas that don't want to use cars for transportation

[@johnnybravo3732]

oh my!!!....i'm now getting into this stuff....i learn a lot from you....i always wanted to build an 18650 battery bank for different purposes.....i don't have any of those tools.....will have to buy them easy pezie lol....

[@pederb82]

Dude, where did you learn to solder? Not one was up to even Ok!

[@rogercrier]

I will second that comment! They are probably good enough to work, but definitely made using a flawed technique. Sorry to be negative :o)

[@Splinter4077]

Thank god it wasn't just me that noticed that. It's almost painful to watch

[@ALSANMAT]

This vid i think was more on how the cells and bms are connected than technique. If you noticed those cells have marks from previous welds before he put the pack together

[@Splinter4077]

Yeah it was only the wire soldering portion haha

[@ALSANMAT]

Tech Talk soldering heats up the cells significantly. Lithium cells don't like getting hot.

[@wedding_photography]

Please get yourself a good microphone and the lights that don't flicker. Turn off all the auto-settings on your camera, so the brightness doesn't go up and down, the color balance doesn't go from warm to cold (like at 1:00).

[@xdmin67]

Just enjoy the free content, since then humans started bitching around everything?

[@reamannmacbiatiagh2057]

Micah, nice to find someone that can speak calmly, logicaly, without screaming or music fading in and out,,, you can even smile,, very refreshing. Perhaps you would be kind enough to give me a rough idea as to how many 18650's I could get into a box with internal dimentions of 290mm x 145mm x 68mm I am only intrested in absolute max number of cells you "think" I might possibly fit in to that space. Ray

[@lvollmer1948]

Good, detailed and very organized. Thanks.

[@JarppaGuru]

macgyver would use duck tape

[@massimogioia4422]

wrong! Just bread and water. Perhaps some milk as well

[@MrGollum1996]

JarppaGuru an egg, 2 batteries, a wire and some ice cubes. But the problem: it would explode

[@fivespeed3026]

JarppaGuru You forgot about the paperclip.

[@OldCharlieRum1903]

JarppaGur

[@NonnofYobiznes]

I was going to ask a question, but apparently you aren't answering them. You only want people to go to your website to ask. Isn't it easier for us to ask here? Anyway, since you're not answering, nvm. Btw, what strikes me is that your using an expensive thing like a spot welder, but you're not using spacers to keep the batteries better ventilated.

[@sometuber6856]

Hmm, good point. People don't waste your time, he doesn't care about your questions. Moving on.

[@ronbrown8611]

he answers some questions what's your question? you might be able to find an online forum to answer your question

[@Kioskflippingfilms]

Great video and thanks for the links in the description! It wold be really helpful to see your layout for a 36v battery, to see how you add voltage!

[@EbikeSchool]

Thanks Simon! To see how I build a 36V battery, check out this page: www.ebikeschool.com/how-to-build-a-diy-electric-bicycle-lithium-battery-from-18650-cells/

[@Kioskflippingfilms]

+EbikeSchool.com Got it, thanks so much for the help!

[@zakariaabderrahmanesadelao3048]

most detailed tutorial on battery builds out there. well done.

[@deltarov5734]

Thanks for this video and posting the links. Very helpful.

[@RobY-1]

This is the video I've been looking for. I'm looking to build my own e scooter. I'm thinking 60v 30a+. Expensive to buy so want to build my own battery for e scooter. Great video.

[@calyfornykid]

Awesome video he really explains how to do it yourself, thanks.

[@PeaceBeUponYou1]

Great video :) Thanks for sharing your work. What kind of Bms and cells do I need to build a 26V/12ah?

[@b.u.shankarboopathy6593]

Excellent work. Thank you so much.

[@talk2stop]

Thanks. A good place to start what I want to do. Many thanks

[@FredoCorleone]

I personally prefer to use length for parallels (to maximize capacity) because my triangle bag can't store more than 3-4 battery in one dimension. I also prefer to make long modular batteries such as 12V 20aH so it's easier to replace things

[@harryhimpson5663]

thank you so much for this video you have properly explained series and parallel and how to read wear each wire to the bms goes i will attempt to build a secondary battery for my escooter as the main battery is not very strong mine will roughly be double the size so 48-60V

[@wimm1392]

Thanks so much for sharing, you got me to built my Power wall. Thanks

[@MuraliMadupu]

Exlent demo how to conect bataris and very rugged way the job done thank you for you exlent demo in you tube. thank you once again,

[@LCSRacing]

Awesome videos thank you. Do you feel this spot welder would handle building larger packs, (euc) 1500 ish.. what sort of packs would require .2 strips?

[@Leahdizon888]

Fans of your channel. Awesome work.

[@atmm89]

do you have to put 2 strips for the second bridging(serie connection)

[@ivansalas8940]

Best video ever made :) Saludos desde Peru

[@PirateNSeaScourge]

Great info, thank you for that. A quick question, can I safely replace my 48v(4x12v12ah) sla setup with an equivalent lithium pack without changing it's controller?

[@arturovivas4491]

Hello, I'd like to start by thanking you for your videos. I want to build a vertical battery with 18650 cells for a 500W/48V or 350W/36V scooter motor. do you know what kent of cells distribution and how many cells I need to use?

[@acmthere3674]

Great explanation, very good video. Many thanks

[@fransschutte3859]

hi Mike, i saw a guy using a battery as a spot welder, which is just two pieces of 2.5mm sq cable straight of the terminals and used as probes for the welder. it was nicely made, but no timeing. he just pushes up against the probes and then takes it off. the reason i talk about this is becuase i have just seen your video about thermal heat. thanks i already have the ebike book, but would love the battery pack book. thanks

[@AimForTheBushes908]

Can't believe I watch this whole thing! Awesome video

[@taylorbaratka6883]

Great video! I think I'll be making my own battery packs in the future instead of buying them pre-built

[@charleshatten]

Very educational....I have a cruiser and I enjoy it but for quite a while I've been wanting to make it an e-bike....there is a bycycle shop in town and I am curious as to what their thoughts and input would be. I watch these folks go by on motorized or e-bikes bought by kit or the whole thing.

[@mop864]

I've enjoyed all your videos and have been learning a lot Thanks!! I wanted your opinion on what kit would be best for me im 235 lb 6'4" and already commute 17 miles by car then 8 miles by bike most days without electricity but would love to make the whole trip by bike I originally was think 52v 20ah bafang hd on my current aluminum novara buzz + 9 speed with hydraulic discs but am worried about the chain/gears/rear frame strength because of the thin tubes in back. I have some steep hills in my commute thats why I originally thought mid drive but I remember you've had both drives before so would love you opinion or thoughts mid drive or hub maybe new stronger bike

[@MegaOhan]

Hi there Thanks for your time for showing and explaining this important things of e-bicycle battery My question is what should I use to make the battery to last long distance driving..? Thanks for your time

[@EbikeSchool]

If you mean long range then you just need more cells in parallel .This battery only has 2 cells in parallel because it is for short range. If you mean long lifetime, then try to charge the battery up to only 95% or so and not drain it all the way to empty. That can double the lifetime of the battery.

[@bronzbronz9048]

EbikeSchool.com hi if we add more sell ,doesn't bring up the voltage?

[@teslabikeman3733]

I have a new 48V 1000W rear hub on my dual suspension which has been waiting for the battery. I have around 300+ new cells @2600mah each of which I plan to build 4x29V battery packs. Connecting 2 packs in series to get my voltage (58.8V extra boost) & then the other 2. & then connect those in parallel to get 52Ah for my range. Each pack consists of 10P/7S. I'll add balance leads & cell loggers to the packs so i can physically see whats happening as i don't trust bms. The bike will also have foldable solar panels with charge controllers as i'll be doing a lot of outside stuff. & i'll be uploading videos along the way. thanks again for your tutorials! :)

[@tacticalkev.9124]

I wish I had your skills with batteries. I'm new to all this. I recently purchased my 1st electric scooter. The batteries aren't total junk. But there's definitely some power leakage from them. I usually need to top off the charge in the morning after charging it the night before.

[@donovanh24]

really clear video, the best I've seen. thanks

[@samrubinoff]

thanks for this video! I don't have a welder...instead welding nickel strips can I solder them on?

[@Joewalshe38]

Good clear video. I already have your book. Thanks

[@ValentinoVitez]

Thank you for the video man. You're awesome by the way

[@melvinbelcher7606]

I have enjoyed your battery build videos . I hope I am lucky enough to get your battery book,if not I will have one soon , because I will build many batteries in the future. I am excited to get started.

[@javieruriel]

Quick question, I have your 2 books my friend but I would like to know if you have one or make one where we can see how to make a powerwall? Thanks in advance

[@juanabellaniturria3056]

muy buen video muy bien explicado EXCELENTE LIKE LIKE...

[@charleslane2735]

I'm so glad someone is actually taking the time to figure the wiring on these ebike,because being that most ebikes are made in China,a lot of them don't have wiring diagrams

[@wonderwulf]

Watching you heatshrink the pack is strangely satisfying.

[@kingerydev]

With all that insulation & shrink wrap, is there ever a problem with heat management of the cells? Will the cells heat up with fast discharge of fast charge? And how many charge cycles might you get. Excellent video! Thanks for posting.

[@CDLynas]

I had a question about the configuration of the battery cells. It seems to me that some bikes have big chunky frames that could accommodate a number of batteries if arranged 2x2 and attached along their length, not sure how hard this would be but it would conceal the battery pack. Is it possible to attach them end to end and how would you go about doing that?

[@gaborboros9840]

Hi,You weld the batteries, but is it OK to solder the nickel strips?

[@respectemelders]

I've watched videos where someone was using a soldering iron to make the positive to negative connections. Can soldering be a proper solution as well?

[@ericgonzalez3665]

Hi, Your videos are strong and best! Plz want to know if i want to support 36v 350w hub motor with 36v 14A+- controller by 3.7v 2500mAh@3C (Hvvea 18650-25F) do I still apply 4 P & 10S, what BMS should I need? 20A?

[@atahghighi]

Thanks for the video, Question , where can I buy large number of batteries for less price?

[@thermodynamicist]

Awesome video. Super informative.

[@gwapome9113]

I like your channel. I have a lot to learn. And I start learning 😊

[@qpidindigo2221]

Great video. Excellent in representation. Clear and concise. I'm wondering how I can use the same to power a small portable kiosk? With outlets for lighting ect? Would probably have to enlarge the batteries and add a few more? And how about additional solar for recharging? MMM? Now that you've got my attention! LOL! Thanks a bunch! Love Q-PID

[@erdal_bora]

Here is some info that can give you some ideas. You can use a solar charge controller with a lithium battery pack to create solar based power. I use 3 18700 cells in series connected to a small charge controller for lighting a room for 5-7 hours after sunset with a 7 watt DC bulb. A 60 watt panel works 12 months a year, with some shortages on dark winter days. In winter solar power production goes down to 10 percent of summer. For a kiosk, you must look up the power requirements of the monitor and the computer device that is connected to it, or the tablet or whatever. A power saving monitor for a kiosk can be under 10 watts. Look up one that is DC power input compatible. It will save you converting your DC power source to 110 or 220V. A stick PC can be around 10 watts. That makes around 15-20 watts for a low spec, low power kiosk computer. Add a few small DC bulbs for lighting and it comes to around 30-40 watts after sunset. Multiply 15-20 watts with daytime usage hour and multiply 30-40 watts with night time usage hours and this is your power requirement for a day. Your solar power production must cover this power requirement and your battery must be able to store enough power to run the kiosk during night time usage hours. Each cell has a watt hour rating. Once you calculate your power needs, divide this by a cell's watt hour rating to calculate the number of cells you will need in your system. Select your kiosk computer components with an eye on their power usage. Choose power saving components and this can help you build smaller batteries for your system, keeping everything simpler and far cheaper. Alternatively, you can use gel batteries which have around 450 cycle with 80 percent discharge. Use more gel batteries so that you can discharge them less and increase their lifespan.

[@erdal_bora]

btw you asked this 7 years ago, I just noticed that :) Hopefully, someone else can use the info :)

[@solomontebogo1918]

You are so good at explaining , I have an ebike and the battery is not charging . what should i check before messing up the whole thing

[@aathityavikash1369]

Will increasing the Ah by replacing the battery but keeping the voltage same , cause damage to my e bike's controller and motor ?

[@dannycasey8261]

You are a very good teacher. Are you a left hander? I am and I've noticed that left-handers enjoy teaching,,, helping someone learn what was taught to us. Very satisfying. I subbed! And the spot welder was cool! I never seen that type. Didn't know it existed. I worked in a machine shop as a Sheet Metal Fabricator and we had a spot welder from the 40s. It was 6 ft tall and had a clumsy foot switch and that old green color just like the lathes. I'm 60 now and enjoy seeing new tools too. Amazing!

[@user-oe8xe4og6t]

Congratulations! you have been selected among my few giveaway winners,endeavour to reach out to claim prize....🎁

[@IngCristian]

hello friend greetings from Colombia, I want to ask where the PCM module that will connect the battery pac get

[@tasoskoutlas9475]

Great video.You must make a video about the motors. I would like to make a bike to go at 50km/h... most for the hills...but it is so many the motors in the market and I don't know exactly what is important when I compare two motors. First I choose the motor and upon this, I build my battery or the reverse?