How To Organize 18650 Cells for your Battery Pack

3D file www.thingiverse...
music: Jersey Devil

[@robw5735]

This video is years old but still relevant, just what I was looking for and this unbelievablely helped to balance my large pack for the ebike when assembling it, Cheers for the info, great stuff.

[@silvy7394]

Ill be darned YT has somehow led me back to these old videos.

[@jehugarcia]

Nice Job matching the cell groups, Wish I would have though of this while building my 600 cell pack

[@RinoaL]

+jehugarcia thanks.

[@pinchertone]

@@RinoaL does internal resistance matter? when building a pack from many different cells... say from 10 different laptop batteries: is it enough to arrange cells as to have similar total capacity? What about adding some fans with a termostatic switch starting them at a warning temperature?

[@gerardjachymiak5822]

@@pinchertone did you find the answer

[@marcopinchetti5872]

@@gerardjachymiak5822 nope... nobody gave a shit before you did (ty BTW)

[@rogermaquino74]

@@RinoaL is it possible to mix cells with capacity ranging from 1500mah to 2600mah?

[@gamingSlasher]

This was surprisingly enjoyable to watch.

[@keokio7]

balancing out those capacities was actually fun to watch, if it was me i'd probably spend all day to match those capacities as close as possible just for fun

[@mikemccormack3997]

:) OCD

[@franktauber9634]

Just go to repackr and enter the ah of each cell and they will give you the packs

[@gerardjachymiak5822]

Repaker didn't exist back then

[@battonfive]

well worth the effort now to reduce maintenance down the line, nice job!

[@NexiTech]

Isn't better if you just add another 18650 to that cell pack where is needed? So that you have similar amps? In your battery pack one battery is for example 1700mah and next one is 2400mah. Isn't true that first battery with smaller capacity is going to overcharge and bigger one is going to be 80%full? Why just don't add more cells in that pack that has smaller capacity like in your first video? What is better?

[@nadirsiddiqui9559]

Super easy way to assemble a battery pack.. Thanks a lot dude..

[@stefanblack3909]

This is the first video I could find that properly explained and demonstrated this - thanks!

[@RinoaL]

well i'm glad i could help! i might be doing this yet again soon. every time i build a new ebike battery i update my methods of making it and of filming it. i'm trying to cram more and more into a shorter video. :D

[@stefanblack3909]

Rinoa Super-Genius brevity is the soul of wit. keep it up.

[@alenwake72]

backround music was oddly perfect

[@terminashunator]

I really enjoyed this video, and I wait in anticipation for your next video. :)

[@blastshieldaddiction]

2nd that.

[@kylesholdice1812]

James Pourroy please help me out I wanna make a massive 84 volt 35 to 40 ah

[@Flashbang_Photo]

Thanks a lot! I am currently gathering cells (have a tester on the way) to make a 6S pack to power a 24v truck inverter (lithium isn't really well suited for 12v inverters designed for lead acid) which will in turn power up a DIY SLS 3D scanner. I hope everything goes well, but this will definetely play a major role into the pack design. I thought that as long as the parallel group capacity was equal, it was fine, but i'll use this method to not end up with mixed 10P and 11P groups, for example (not that i know if that'd be bad though). Cheers!

[@maxspruit8370]

I put all the capacities in excel, sorted them by capacity. Then calculated the average of the top number of cells needed. Finally multiplied by number of parallel cells and rounded down. Then i sorted them to come to the calculated average.

[@markedtky]

Smart. Nice work

[@haurustrum5654]

Please do continue doing these videos, even if you get a great job.

[@RinoaL]

Hauru Strum already have a great job, and i dont plan to stop my videos either. so your wish is already granted.

[@haurustrum5654]

Rinoa Super-Genius excellent

[@IONindustries627]

Still better then a Nagra Battery Pack

[@osimmac]

+John Sheppard wat are the chances that right after i watch that one video that i come here and see that comment.

[@Mamutkailiai]

+Mike Cammiso SAME :D

[@osimmac]

Darius Rimeika so crazy lol

[@IONindustries627]

Actually after the video on the Nagra batteries was done, it took me here. lol

[@tunxismotorcompany2514]

Is there any issue with mixing chemistries? I bought all my laptop batteries from the same source but I ended up with what I think is ICR and INR. The types are JNICR18650, +FP 18650, and INR18650HE.

[@franciscosanchez9406]

Does it matter to the order of batteries capacity? What I mean is we have batteries with different capacity and trying to put it together do we put it from: Low to High, High to Low, or High at each end and Low in middle!

[@RinoaL]

Im not sure that its super important tbh

[@madhakaa]

if in the near future you may put together an 18650 pack meant for a solar system and showing how to hook it up with a charge controller & inverter i would appreciate i have seen very few solar systems running on 18650 packs on youtube and those that are there don't really give detailed explanations

[@RinoaL]

Absolom Madhaka TBH i dont think stationary solar power systems are a good use of 18650s. especially when lead acid batteries are so cheep at junkyards. i think its best to put 18650s into mobile machines for now.

[@jurikristjouw]

Rinoa Super-Genius just figured that one out also...

[@aerotro]

Absolom Madhaka I actually use lithium ion cells in a solar system, they are far superior to lead acid that are very inefficient and have to be constant trickle charged, unlike lithium ion and the losses are much less for the latter. According to Battery University 18650 Cells are ideal for solar power systems as the Intermittent charging is less likely to stress the cells, but with lead acid batteries it takes a lot of constant charging to get the chemical reactions going, and this is not very efficient especially in some area's like here in the UK when we hardly get many days of sunshine SEE batteryuniversity.com/learn/article/charging_lithium_ion_batteries just below SUMMARY Quote "Charging can be intermittent and the battery never needs to reach saturation, as is the case with lead acid. This is a major advantage for renewable energy storage such as a solar panel and wind turbine."

[@madhakaa]

thats great do you have any videos of your set up i have access to these 18650s and in my country good lead acid batteries are quite expensive thats why i want an 18650 setup

[@gtag174]

Good job on the work. Could you please help me with the calculation of the capacity. I heard that if the lower capacity is mixed with a higher capacity in a pack the total capacity of the pack is actually the capacity of the lowest cells in the pack. how true is this ? i also have some cells from a laptop and your video was really helpful when it comes to mixing the batteries with different capacities.

[@brannenthompson9662]

I've been trying to get this question answered for ages thanks so much, I can't beleive I missed your video as Isaw some of your earlier videos ages ago when I first got my E Bike about 8 months ago and am building my first battery, I'm just getting to the end of capacity testing and just needed to know how to arrange my cells in mah.

[@joetaylor010]

Just throwing an idea out there but next time you find yourself rearranging cells it might be useful to use a computer program to arrange the cells so that the chunks of 8 deviate from the mean value*8 by as little as possible. Just seems like manually re-arranging the cells was very time consuming given the simple goal of grouping the chunks equally.

[@RinoaL]

+Joe Taylor its easier to do it manually, entering the data into a computer and stuff would be wasting more time.

[@joeyocom5087]

The lower m Ah cells will draw the energy from the larger cells to equal out charge

[@glennsepelak5113]

I have over 600 harvested and tested cells. charged and shelved for a 18 months or more and rechecked. removed any under 75% now the sorting... any suggestions for packs.? want to do 24 0r 48 volt system on my sailboat.

[@catlightst]

why am I enjoying the math and puzzle of rearranging cells, maybe it's the music.

[@kanecool2000]

Hey great video. Could you tell me how you tested the capacity of each cell, was it just the charge capacity or did you use a discharge method and if so what was your discharge current and the cut off voltage. I've got loads of lipos to test and want to make sure I do it correct. Thanks for any help and keep up the great work.

[@RinoaL]

kanecool2000 i first charged them to atleast 4.17v and then discharged them at 500ma discharge on my Imax B6 until they hit 3.0v. keep in mind it should stop once it hits 3v not lower the discharge to keep it there. my current imax B6 is a ripoff of course, but they didnt do a very good job at ripping off the imax b6. for some reason when the cell hits 3.0v it doesnt end the discharge it just lowers the discharge current to keep the cell at 3.0v. and after a while its pulling 0.0 amps and counting up. so it just then slowly counts up to infinity. so i used the Ni-Cad discharge setting instead. the cell should bounce back up to 3.6v after the discharge test is over.

[@happyzl9005]

Nice job on battery my question is what would each parallel row be in mah to calculate battery.

[@omfgbunder2008]

i literally just built a 13s10p (6s10p + 7s10p) pack for my bike, it's on the chargers now...

[@aliakbari437]

old laptop batteries? how's it, after 4 year's?

[@josefmalmfors351]

where would you recommend buying cheap 18650s?

[@glennsepelak5113]

Nice job

[@crimmy0204]

wont this cause problems in cell pack longevity? the low cells will eventually die out and pull your good cells down with them.

[@CrazyFrank]

Your videos are brilliant!

[@appliedlogic1371]

Great video! My kid has a 36v 500w mini dirt bike, I just took the battery apart to see if i could upgrade it and found lots of spare battery slots. Would you be able to help me with the configuration if i sent you some pictures? It has a 3 x 12v 8ah lithium 18650 pack batteries (40 in total). I would ideally like to add an extra 12v and maybe a few extra collective AHs. I have 18 extra used 18650 to add, various voltages from 2.2v to 4.1v. Thanks

[@slinkytreekreeper]

Any cells below 3.2 standing are most probably damaged. I really would do a charge cycle on them first to see if they are foobar or not before building a pack with em.

[@commandant30]

Hello Rinoa, Please if you could help me with my question, I have bunch of laptop cells, mixed ( ICR , INR ) and planing to DIY 3S pack for solar. is it okay to mix ICR and INR Li-ion?? PS: I use Repackr to group the cells in Parallel.

[@gzklgg]

Hi man, quick question... Have you seen the Tesla's model S battery pack from the inside? Really interesting... I think they use soldering flux as a fuse, do you think it's a smart thing to do?

[@MateusLeonardoMendes]

It would be cool if you made a battery that fits all the bottom of your wooden cargo box and "hide" it below a sheet of wood, also it's enough space for a bigass battery!

[@br1ckbr3ak3r]

I'm "that guy" commenting without watching. Does repackr come up at all? Is that what you use in this video?

[@leondendle]

Hello Rinoa Super-Genius, great videos. How are you balance charging your 12 packs, have you got a 12 way balanced charger? Is it possible to wire 2 X balanced wires and charge half the battery at a time with a 6 cell balanced charger?

[@JoseGarcia-px9xj]

so looks like you are having a difference in the same module(parallel) on lower capacity cell with the higher capacity cell of 500mAH this is ok

[@RinoaL]

go read my guide called "The Tinkerer's Guide to the 18650" i go over this a lot better in that. feel free to print out the guide if you like.

[@storxusmc]

Hey, what BMS did you use for your 48v pack? im trying to figure out how to charge my pack, i have a 48v ebike motor on its way and i want to charge/balance the pack correctly, i still have no bought a tester like an imax b6 yet because i was hoping there would be one that could balance all 13 strings once i solder them together..

[@zamfiremilian365]

Hello, thanks for your 3d model, I'm trying to add two six rows to have 60 cells but is a pain to work in deign spark m. (I have no experince). If is not hard to add two more rows and share-it would be great. Thanks

[@pugideh]

Hi how did you know the capacity (mAH) of each batteries, did you charged and discharged them individually?

[@reneea5559]

they are each 11.1V 80Wh

[@reneea5559]

iv been watching and learning but Im wondering what is the problem with using the laptop batteries intaked? i know its different but wouldn't it be easier for charging and can it be done or at least tried .have you tried it?.i have 8 new Dell 9 cell batteries .i need 36v .im not sure how to try it out.i have the right charger -discharger and components to build like you showed but i thought this couldn't hurt to ask first

[@larryjohnson4619]

I would be very uncomfortable mixing different amp hour 18650 batterys in a battery pack...

[@RinoaL]

every cell ever manufactured has different mah, just they may be rated the same. but whats on the label doesnt reflect whats really inside the cell. so its all a question of how much deviation is an issue. and for this, this pack has taken me 4,000 miles without really much issue. had one cell die on me that id found at 0.2v so now i limit to cells that have never gone bellow 1v. but its still my main battery.

[@bparker86]

dude is crazy smart

[@grndragon2443]

For an e-bike would you worry that much about cell resistance?

[@xdagasx4153]

Hi,Is any calculator out there, I have many cells and want to build 12s battery? cool video

[@heardandtested]

it's ok for me to discharge my 1s battery at 1A 0.8v by selecting NICD on my lipo charger to discharge the battery

[@mikecohen9349]

I saw video of you using a gas powered lawnmower was it powered by petrol before if yes how did you switch it

[@RinoaL]

Mike Cohen i have a video about that.

[@maqbool13]

Great work

[@sized4spills]

Awesome and entertaining video as always!!

[@RinoaL]

sized4spills thanks!

[@TheComputerman2004]

what about IR matching? Did you find that necessary?

[@RinoaL]

dont really care about ir tbh

[@happyzl9005]

That worked out thank you.

[@jurikristjouw]

nice work!

[@alexfisher9080]

What are them cases called ? Can't find them anywhere.. thanks

[@DanielDogeanu]

Question: Can you power a whole house with batteries like this? Like Tesla Powerwall?

[@RinoaL]

+Daniel Dogeanu yes you should be able.

[@DanielDogeanu]

Rinoa Super-Genius Thanks for the answer. I'll give it a try and see how it goes.

[@DanielDogeanu]

James Ledesma WAT?

[@ivanstroganov5458]

how exactly did you meassure these capacity numbers? discharge test, I guess, but at what current draw and down to what voltage?

[@TheRadiastral]

One can reasonably assume the discharge was at 1A, from 4.2V, to 3.0/2.8V. There would be a negligible difference between 3V and 2.8V SOD. I have just recently bought 30 "broken" laptop batteries, disassembled them and tested each cell in an Opus BT-C3100 charger, so 4 cells at a time. The default discharge rate on the charger is 500ma, but I always test at 1A, just like vast majority of people on YT. Capacity is given in mA during a "Discharge Test", which charges to full, then discharges to 0 and charges to full again, at least in this particular charger. Hope that helps.

[@JoseGarcia-px9xj]

do you have around 200 cell what about when you have 3000cells

[@happyzl9005]

Sorry what is a repackr ?

[@ihabahmed1132]

if i have 4 batteries 5v,9v,12v &24v connecting them in series gives 50 volts ? if connect them in parallel what volts do i get.

[@slinkytreekreeper]

For goodness sake, don't parallel up any batteries that are not the exact same or very close to the same voltage. There's only bad that will come from that on any level.Same voltage in parallel but capacity is combined. It's why you parallel up packs to get the capacity you need and then series those packs to raise the voltage. They must be the same voltage though, not various different ones.

[@mikeh6286]

I stumbled across a webpage where you can input all the capacities and the page then creates perfect groups for your battery pack. I lost the URL and now I can't find it anymore. Does anyone know? Thanks!

[@mikeh6286]

Found it. It's called repackr.com

[@RinoaL]

thats a pretty useless website but whatever.

[@markusgustafsson7690]

how do you charge them? do i need to balance them?

[@gatyi28]

Hi there. I’m really newbie on this one but I want to build a 36v 10s5p battery for my e roller. I collect some battery’s from 1400-2100 mah gonna give me about 1600 if I organize like you. My scooter has a 250w Motor a Controller says 17 A . How can I calculate how Much current will pull from one cell ? If 250 w / 36v = 7A what’s that 7A ?

[@RinoaL]

yeah your math seems right, however testing it with a current meter is best. just try to make sure you have 2Ah for every amp you plan to pull, and your battery should take you pretty far.

[@gatyi28]

Rinoa Super-Genius lets say 7A. If 5 battery in parallel an 10s . Would it pull 7A / 10 ? How much would it pull from one row ( parallel ) ? I have no clue :)

[@Mimerneos]

nooooo you missed a 16646 as well!

[@tabineshhtc]

Can we use gulf car battery instead of doing these hard work.

[@familyguyandothergreatanim2371]

Oh hell no

[@Asd7pl]

Where do you buy all these batteries? I want to buy some

[@ShafakTan]

why not add one of your discarded batteries as the 9th cell paralell to the weakest pack in the first place? your overall battery capacity would be slightly higher ??

[@RinoaL]

why would i add a discarded cell? if a cell cant be trusted, then it cant be trusted.

[@ShafakTan]

Rinoa Super-Genius Sure :)) then lets change the question to: why not add another 1800 ish to 2 ah cell to 15 ah pack as 9 th cell? Then they will all level at a higher level amp? Sorry for insistent question. Just quriosity...

[@RinoaL]

because i'd like its shape to be uniform and i need to learn to get used to using whatever capacity this configuration gives. if i added one cell i'd add a 2nd, and a 3rd, until i'd added a whole other road of cells and then on from there. i need to know when to stop and so i stop at when i have the numbers of cells i planned. lol

[@ShafakTan]

Keep on the good stuff.. just found tour channel.. You rock ;)

[@RinoaL]

thanks ^^

[@felonebike9859]

What about matching the resistance?

[@RinoaL]

never cared about that

[@felonebike9859]

@@RinoaL That's the whole health of the cell. if 2 cells have 2000mah of capacity but ones .15 ohms of resistance and anothers .500 ohms it'll discharge the cell much faster on create dead cells.

[@RinoaL]

Only thing that will make a cell unhealthy and thus liable to explode is if it went bellow 1v or had a manufacturing defect.

[@Mimerneos]

nooooo you missed an 1809!!!

[@CrazyFrank]

How do you bulk buy your batteries (laptop batteries)?

[@RinoaL]

Crazy Frank i went to Weirdstuff Warehouse and bought 30 or so for 3$ each, and next ima go to a local recycling center and buy about 50 packs for cheeper. but before i moved to silicon valley i bought them off ebay for about 12$ per 12-cell pack.

[@markosikic2972]

which battery you use??

[@CrazyFrank]

Have you ever been pulled over by the police asking about your motor?

[@RinoaL]

Crazy Frank no

[@BadMax02_VR]

OMFG i have to wwait for these fricking capacity testers from china i have like 500 cells waiting for those testers

[@mohamedshafeelmohamedbilal6364]

Any software available to organize?

[@RinoaL]

Easier to do by hand.

[@mohamedshafeelmohamedbilal6364]

@@RinoaL ok Am making huge pack that’s what I ask.

[@enginehead9966]

How far can you get with the setup you have now at full throttle continuosly?

[@RinoaL]

Enginehead99 idk 20 miles? why would you want to go full throttle continuously?

[@BGBTech]

Enginehead99 can't answer for his setup specifically, but: unlike gas engines, the "throttle" doesn't as significantly effect battery life with electric motors, rather it is primarily dependent on the load. when you give a motor full power with little load, it uses little power, but uses considerably more power when moving a load (even at a low duty-cycle, AKA, "throttle"). when the motor reaches a certain speed, its internal reluctance will limit it from going much faster, however its power use will drop to a level just sufficient to maintain that speed (the load on the motor will drop significantly at this point). most of the power use then will be during acceleration, with slow acceleration using less power over more time, and rapid acceleration using more power over less time, and this should roughly even out (with some variation due to efficiency curves in the motors and similar, but these are much more uniform than with gas-powered engines). the main variables that are likely to vary with speed, and thus effect efficiency, are things like mechanical (bearings, road surface, ...) and wind resistance (drag). typically, wind resistance is the bigger factor, as it is positively correlated with movement speed (IOW: it increases load at higher speeds). in this case, travel speed is likely to be a bigger factor than how much power is being fed to the motor, but then again, these things don't usually go fast enough for wind speed to be a huge factor I wouldn't think. so, assuming all this, one would expect a "similar" total distance with only a minor impact due to speed.

[@asanchez4627]

Awesooooome !

[@smokintaco]

Do you know the model of your green cells?

[@RinoaL]

smokintaco Sony US18650GR cells. they also have a date code on them. most of these where made in 2004.

[@thedarthlord7724]

Doesnt the batteries in those pack effect each other?

[@tubularap]

I'd love to learn more about that too. As I understand it, that is where the "balancing" (while charging) is for.

[@thedarthlord7724]

@@tubularap hey I am learning too and I have a question if you know please let me know : I have 12 batteries 6 from Samsung and 6 from LG (they have different capacities) Ihave to make a battery pack with those (maybe in series and parallel ) so can I connect those batteries and charge with a Imax b6 ?

[@tubularap]

@@thedarthlord7724 -- I am sorry, but I can't answer your question. Those are the things I am figuring out myself. But we'll get there eventually. So many good tutorials to find.

[@thedarthlord7724]

@@tubularap if you find one please let me know

[@tubularap]

​@@thedarthlord7724 -- Here are some good links that I found, and will be helpful for you too : The best battery-cell database I have seen so far : secondlifestorage.com/celldatabase.php NERDVille, explains about batteries, shows spot welding, and at end of this video he does an autopsy of a cell : kzbin.info/www/bejne/j6PUpHR9p5lkq7c A guy that 'lives' batteries is HBPowerwall. You'll never get bored. He works with 1000's of cells and knows his stuff : kzbin.infovideos Another totally battery-guy that keeps you engaged is jehugarcia. He goes through boxes and boxes and does great tests : kzbin.infovideos Also a lively battery-guy, plus solar panels and power walls; DavidPoz : kzbin.infovideos For batteries, wiring, motors; EV - Customs : kzbin.info/door/7GJfTy_0MP-UCk5pkCwUywvideos Great channel, especially for batteries; EbikeSchool.com. Excellent explainer of how to arrange batteries in series and parallels : kzbin.info/door/RMrqzsrPIWvY3PINkLKs-Qvideos For a full understanding of all types of electric motors, and get the best teacher (seriously !!!) there is, go to Jeremy Fielding : kzbin.info/door/_SLthyNX_ivd-dmsFgmJVgvideos Anything solar panels, with comparison tests; Will Prowse : kzbin.infovideos A video by volvo09 about the CID-safety fuse in some type of 18650 cells : kzbin.info/www/bejne/Z6iWhalnf8xjptU Build your own pack with a BMS; Wes That Tech Guy : kzbin.info/www/bejne/hHjTaJZ9d76CgsU I wish you many good learning and building sessions.

[@robertmartinez9786]

Does internal resistance matter?

[@RinoaL]

ive never tested it. if a cell gets too hot while charging or discharging, i count it as bad

[@antonnpn9063]

You.are.awesome

[@JoseGarcia-px9xj]

I have 4300 cells, do you have any recommendation

[@joebourque3690]

send them to me

[@idubz]

no, to me

[@Moonblade042194]

You had an 1809 when you pulled the 1823

[@RinoaL]

+Joe Toney ah well its just a few mah.

[@llamudos9809]

Hi Rinoa Love your vids! WD!!!! Quick question> Have you made any vids regarding Internal resistance checking of your cells>? A device called sm 8124a is getting good reviews. If you get chance check it out! I see a lot about Voltage and capacity but from what i can see discharge speed and charge speed is hardly mentioned. I just wondered if you ever work out IR when making packs?

[@RinoaL]

no ive never tried testing resistance, havent needed it yet tbh

[@useless844]

why not try rc car lipos

[@markkeilys]

spokane underground crawlers 18650 cells are cheaper per Wh

[@markkeilys]

actually i just lied rc car li-po batterys are cheaper per Wh (at least the way im buying them) ***** i know its actually what im planning on using.. i actually set up a spreadsheet based on what i want/need..

[@S30Uploads]

spokane underground crawlers open up a lipo and expose it to air for best results

[@HW1099Tube]

spokane underground crawlers Instead of venting like a 18650, LiPos will go up in flames, and he would have a giant bomb in the back of his bike

[@RinoaL]

HW1099 18650s are LiPos, LiPo and lithium ion are the same chemistry just they tend to be used to denote differant form factors. this stems from "lithium polymar" being a media buzzword in the 1990s much like "graphine" or "quantum" is today. so it was only a matter of time until a company branded their Lithium ion cells as "lithium Polymar" to profit off that media hype.

[@markkeilys]

"i'm going to put fuses in the battery pack" quit giving me ideas my bill of materials is already too high.. but that would be a good safety measure... ill see how much diodes cost first..

[@RinoaL]

***** diodes are a bad idea because they are resistive.

[@markkeilys]

i know but if its worth it its worth it. yet to find any i can use with the cells i was going to use, but found some fuses that will work damned good for

[@markkeilys]

Rinoa Super-Genius i am an idiot... would need a complex setup to charge (them all at once) cost to high abandon thread.

[@joshuachettiar86]

please send me sme of those bateries

[@RinoaL]

no, get your own.

[@thespiritof76..]

Omg🤯 do something already

[@RinoaL]

this is a youtube video, moron, you can skip forward.

[@g.m.6494]

lol you just wasted yours and everyone else time... you should match both voltage value and capacity value as close as possible...a 14,000 and 17000mah will cycle longer than trying to match 2 x 16,000mah batteries...very bad advice and best way to create premature failure

[@socha6]

Yeah. Nice job. But i think this isn't a good solution to organise battery pack. I also have e-bike and I also build a DIY battery from old laptop batteries. I must say: your videos inspired me to make DIY battery (especially video when you tested your new battery and you estimated it for +100 miles). Ok, I built battery with is 12p7s (29,4V), and I group them in the following way: 1. 21956 mAh 78,106 Wh 2. 21954 mAh 78,905 Wh 3. 21982 mAh 78,832 Wh 4. 21954 mAh 78,66 Wh 5. 21959 mAh 78,587 Wh 6. 21950 mAh 78,654 Wh 7. 21958 mAh 78,444 Wh unfortunately the first segment (with have the lowest energy in Wh) after full discharge whole battery, has a voltage of 2V (the other segments has about 3 - 3,3V). It seems to me that by combining batteries with the highest and the lowest capacity.

[@nathangarrett452]

Ok, so I know your leaving today its August 1st were I am. Be a cat a piss on their property when you leave lol don't get caught.

[@RinoaL]

Nathan Garrett i'm going to slowly move over august tbh. no sense in rushing it when i dont have to.

[@nathangarrett452]

Oh OK when do you think you will completely move out

[@RinoaL]

Nathan Garrett no idea