My DIY 18650 Battery Charger

[@alphameric3786]

I admire your hard work, your patience, intelligence, and your dedication in sharing your skills. I am a lazy dog that does not have the patience and time and would rather buy a finished product. cheers and more power Master Sorin!!

[@SuperDataSafe]

When you consider the range of tools used here, the result is pretty good. Nice with a DIY video without the use of CNC, 3D printers and other expensive machines. Good job, and good explanation.

[@frankenjid5156]

I accidentally bumped into this video and had to watch the entire thing. You have seriously impressive skills, nice work and nice video. Thanks!

[@ktestable]

I appreciate the humor you add in you videos

[@jagardina]

Very cool project. I probably would have tried to make it possible to take it apart and change stuff, all the glue is somewhat permanent. But when I first saw it I did not think it was wood.

[@farhadrahman1658]

Dear Sorin, your videos are always helpful to learn something new. Very good job and you are really awesome.

[@lrshekhar3145]

Simply GREAT What a fine quality discription ! Each and every point is cleared. Thanks dear Again simply GREAT

[@sssteve5430]

I like the way you work clean and best of all is your explanation step by step AAA.

[@jyotirani8232]

really good project

[@tomburnik8259]

Very nice, especially when using that hi-precision high-end soldering iron :P Great job!

[@HBPowerwall]

Well done bud! Great tool that can help the community

[@ealumalaiealumali3716]

Jjhh

[@davidkinuthia1052]

Man have been looking for a good charger for my lithium batteries and you nailed it sir thanks

[@jamest.5001]

When I first saw it . I thought it was 3d print! Nice job. Mine takes up about 1 sq meter! And only charges 12 cells ! And discharges 3 cells. Nice! Have you thought about using some thermal sensors in a silicone gel or something to get the charger/dischager to shut off if the cells get hot? I was getting up mid night for batt change. And put a cell in back ward twice. I started using more light when changing cells. Trying to charge and test 100's & 100's of fast as I can takes a long time. So I got up mid night for cell change for two months plus. I have 98 to go. Then time to get more! I only need about 10,000 cells with 2.5-3.0 ah each. (2600-3000 mah each.) In a 29.4v 7s bank. It's gonna take time!!!! I'm only like 1/100th through that at best. I guess about 5k cells would work. But what's wrong with excess!!! Nice video!!

[@DrZipZwan]

Great video as Always!! I think that everybody will agree that the best part was about the "spaghetti sandwich". (7:18) dont get me wrong all the DIY project is great !!! Sorin, keep creating us amazing projects!

[@radiotec76]

I just love this 18650 charger project even more than your last one. When I first saw the thumbnail to this video I though it was a textured 3D print. Nice work! Again, you've got balls of steel to solder smd circuit boards with a 100 watt soldering gun. Oh, and now subscribed and rang the bell.

[@horstalinludwig2648]

Un proiect excelent! Felicitări Sorine. Circuitele de încărcare le.am testat si eu, sunt foarte încântat de ele. Cred ca ma voi apuca de proiectul asta in concediu.

[@daijoubu4529]

You can replace the SOT23 protection IC with a FS312F with a 2.9V cutoff instead of your typical DW01A

[@GeekMustHave]

Thank you for this video. I liked your approach to the charge/discharge issue. I don't know which I hate more, hot glue on the fingers or two fingers stuck together with super glue. Keep broadcasting!!

[@sunshine212]

nice work dear sorin!! you are getting better everyday

[@jamesrodemeyer7544]

You have a great project, but I thought of a addition, how about a voltage and tempreature connections to a Nano then to the computer so you can monitor and record these parameters. I connect 4 leads to the positive poles of the battery and 4 thermisters to the battery holders mounted in such a way as the press against the batteries. I am writing a sketch to monitor these valuse and send them to a computer useing putty. If you want more info let me know.

[@arhamahabab7356]

omg how is this KZbinr not popular

[@MrJozza65]

Nice work; the case looks really good, much better than a plastic box.

[@floringrek1563]

Este o super idee !! Așa suntem noi români. 🙌🙌

[@viswanathanramakrishnan7613]

It's a good DIY to try provided that the wiring details are available.

[@yoshibros1111]

"I'll make those voltmeters a bit smaller by cutting those shrek ears" -Sorin

[@TonyTowersTurkey]

I really like what you've done here man, really inspired.

[@pinosan60]

Hi,great job, could please include the front panel layout in the component list, that' ll'be perfect

[@Patrick-pl8wv]

Excellent job on the charger. Thanks for sharing.

[@iulianbeta6817]

La tp4056 fara " short circuit protection " ai putea folosi diode de 3A la ieșire și a pune o siguranță de 2A pentru a avea protecție împotriva polarității inverse și de scurt circuit ! felicitări esteticii îmi place !!!

[@thumoum5248]

nice, but do you know how to solve problem of rise volts on display when charged? it is about 0,2V on each display and it pisses me off ...

[@yjtechnical4700]

Nice work Sorin.

[@madnokof]

I noticed that the schematic did not include the led indicators for the charging and fully charge, was wondering if it would be included, I'm confused, But nice build!

[@rich1051414]

Did you put a pull down resistor on your sensor wires so your voltage reading doesn't have a seizure when you remove the battery? Even a 10M pulldown will be fine, which would drain nearly nothing.

[@Sorin_DIY]

no I didn't :( it does have a seizure.

[@rich1051414]

@@Sorin_DIY I wish they would add it to the voltmeter stock, but I guess 1 resistor is asking too much when selling something as cheap as possible xD

[@vaibhavkumthekar49]

Unbelivable Work done Sorin... Like it...

[@mrangrybirds1000]

Wow, muchas felicidades Sorin! Tu proyecto es asombroso, super funcional y con un acabado muy profesional! Me encantaría poder replicarlo, deseame suerte para que funcione!

[@electronicsideabd]

👍

[@rosekreuze]

i just hook up everything directly for the meantime: the battery to a usb voltmeter in between, and the resistor. it doesnt have a cut-off so im closely monitoring. i just want to discharge it, also at 3.59v while under load using 10w10ohm i am only drawing 0.29 amps. would you recommend a higher resistor value to speed up the process? its already running 3 hrs 39 mins and so far the total mah drawn were only 1071 mah

[@Sorin_DIY]

for a higher current you need a lower value resistor I=U/R. if you want a higher current, you can use a 10W 6.8ohm resistor, but it will get very hot.

[@rosekreuze]

thanks alot! that will do and with proper heat dissipation i suppose?

[@Sorin_DIY]

yes

[@lrshekhar3145]

I request you to pleas give a complete list of items required, if it is possible for you, as I had seen so many other video makers, for easy and doubt less arrangements of articles. Thank dear for your reply 🙏🙏🙏

[@Sorin_DIY]

hi. I got the components from banggood.com, the links are in the video descriptions, but some of the components are not available anymore. you can find similar voltmeters here: www.aliexpress.com/item/32810115206.html?spm=a2g0o.productlist.0.0.6d5826a5z5Mnk3&algo_pvid=7a3a3872-3f76-410a-8789-c30b53cadaf9&algo_expid=7a3a3872-3f76-410a-8789-c30b53cadaf9-32&btsid=0bb0624116021885598295083e4b96&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ TP4056 modules: www.aliexpress.com/item/32986135934.html?spm=a2g0o.productlist.0.0.77df6b83BCom3g&s=p&ad_pvid=2020100813293617644699808558460024350665_1&algo_pvid=e5a8cb63-4958-498a-bdf4-3c09af34bf8b&algo_expid=e5a8cb63-4958-498a-bdf4-3c09af34bf8b-0&btsid=0bb0624316021889768858731ed497&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ 10W 10ohm resistors (10R): www.aliexpress.com/item/32957381670.html?spm=a2g0o.productlist.0.0.75381fb0HlvWzL&algo_pvid=f3092a2d-aba3-4f01-8568-81bdfceefcca&algo_expid=f3092a2d-aba3-4f01-8568-81bdfceefcca-0&btsid=0bb0600116021891486082757e1702&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

[@lrshekhar3145]

@@Sorin_DIY Dear Sorin, As I am living in Delhi and if you publish list of items along with your post, it will be great help to procure from local market demanding by the articles correct name.

[@enriqueangel532]

Lo pego con rexina, le puso gotita instantanea , Pegamento de mezcla, lo dejo de tal manera pegado?que la suma de tiempo trabajado y de espera mas materiales mas plaquetas?...vale mejor la pena comprarlo por que si se comete algún error y deja de cargar una PLACA DE CARGA?????.....Bs As Argentina

[@Darieee]

3:00 be sure that over the charging duration it will soften the glue enough to where the wires might mode the charging modules around - try using sanitary silicone next time - takes forever to set, but it will withstand very high temperatures without breaking a sweat (and is also soft enough to rip in case reworks need doing, unlike epoxy)

[@Kalvinjj]

Dunno if it's enough softening to worry, hot glue takes quite a lot of heat to melt, those circuits will shut down long before 100°c (the IC, the board is a lot less), dunno what type of glue he's using but from my searches they come in low and high temperature variants, so about 120ºc to melt on low temp. type (a bit worrisome) and high temp is about 190°c which is way out of the range.

[@Chris0612]

One last question, what is the polarity of the led pins on the Tp4056 Board and why can you use only 3 wires each?

[@Sorin_DIY]

hi. the LEDs have a common anode. the polarity on the board is (- + + -). the positive connections are in the middle.

[@Jshankarpatel532]

You work to hard brother good knowledge 👌👌👌👌👌👍👍👍👍👍 nice video

[@engizmo]

wow awesome. Could you make one that lets you set the voltage to charge to or discharge to? I know lots of people that would love this and if you put a kit together I'm sure you would get some community support :)

[@ericsensico6313]

Can i have tips on making these DIYs? I have a fear that my battery (prismatic) might explode or catch fire, or i would get electrecuted because i dont know much about these but i do really love to learn about, can i have some tips?

[@kushalagarwal5407]

what a powerful lethiumi battery charger

[@trifoieniko9733]

Salut Sorin. Am un laser pointer driver defect(am incercat dioda laser la curent continuu si functioneaza) . Un MOSFET cu marcajul "T4L" caut dar nu am gasit pe internet nimic. Poti sa-mi spui ce as putea sa folosesc care este compatibil, sau un link?

[@hazimreitz]

THIS!!! is perfect for my drill battery restoration shop :D

[@eugenchirila4285]

Salut Sorin. Imi plac foarte mult tutorialele tale. Cum pot lua legatura cu tine?

[@fraaggl]

0:26 but i thought that you can't wire all the tp4056 with the same positive wire because it short circuit the battery ?? You told me that in a comment a few days ago...

[@Sorin_DIY]

that was on the 4S BMS charger video. NO you cannot connect TP4056 modules in series and use the same charger for all of them. but YES you can connect these modules in parallel and use the same charger.

[@fraaggl]

@@Sorin_DIY Thank you master i have made the newbie mistake of the parrallel / serie !!! I wish there was a way to plug them in serie. I know you can isolate the supply but it kind of expensive to add a BO505S for each TP4056...

[@Me11oIngenuity]

Nice work, Sorin!

[@skoto.power.systems]

Very accurate and nice as well,good job 👍

[@tech-dips]

How about reverse polarity protection? These little boards are not protected. Great video btw

[@FikiFirmansyah]

Diodes & Fuse too... Better Safe Than Sorry

[@Ale_giro]

Adding a spring or size adapter, can you use it to recharge/discharge any kind of batteries (like AAA, AA, 1,5v, 3,6v) or it will works with 18650 batteries only?

[@Sorin_DIY]

it works with li-ion and li-po cells with a nominal voltage of 3.6 or 3.7V and a max voltage of 4.2V.

[@Ale_giro]

@@Sorin_DIY Thank you, so it means "it will not works for 1.5v", I have to disassembly laptop batteries and mobile phone batteries... (PS: i saw your power bank video too, I assure you that it will be littler and lighter if you install old some 3500-4000mah mobile phone batteries instead 6x 18650) And soon i'll build the power supply! Thanks so much!! PS: you can find the same components for cheap in other websites (IE: Mini voltmeter for 0,75$ instead 2,51$ each)

[@aseptakahara2697]

your calculations very completed... good luck for you brother 👍

[@carlosarroyoam]

Very nice project, thanks for sharing

[@RDarrylR]

Great video! Thanks for sharing

[@aldodu4475]

Great job, Sorin.thank you

[@kosh142]

@Sorin - DIY Electrical Nerd I love this and i am going to build it soon. what other 3s, 4s, and 6s BMS could you suggest are good as i have some idea's of my own. thanks

[@Sorin_DIY]

hi. for 3S and 4S BMS I think these are very good: www.aliexpress.com/item/4000214801977.html?spm=a2g0s.9042311.0.0.27424c4decUmur for 6S I ordered this one, but I haven't received it yet: www.aliexpress.com/item/4000215284468.html?spm=a2g0s.9042311.0.0.27424c4d7cRb28

[@kosh142]

@@Sorin_DIY Thankyou i will add these to my list :D

[@Joshua-ju5uc]

How would we go by installing our own DIY solar panels to this charger station?

[@Sorin_DIY]

you need a higher voltage solar panel (12V, 18V, 24V...) and a powerful CC/CV buck converter.

[@Joshua-ju5uc]

@@Sorin_DIY Well I figured I'd have to put a few panels together to make it 12 volts, but how powerful of a cc/cv buck converter are we talking here?

[@jurikristjouw]

Very nice project sir. I was amazed by the transparent daylight reading plastic for the LED displays. Very very nicely done. But I must say, it will be a bit expensive this way? You could also use the same holder and a iCharger with a 4cells balance plug.

[@Sorin_DIY]

hi. it is a bit expensive, because it has a lot of components. but I like these tp4056 charging modules, they are very useful in a lot of DIY projects. you can make a cheaper charger with these charging modules, without all the other components, I have a separate video for that.

[@jurikristjouw]

@@Sorin_DIY Thanks for the info! I do like the sturdyness and dedication of your project. This thing is built to last! I am sure in a 100years they will still be charging 18650's on your project.

[@dancoulson6579]

Very good project. I like it a lot. One difference I would do though - Get rid of the blue LED's. I would have charging as amber LED's, and when fully charged, use green. Even better the Gallium Phosphide green which is more of a yellowish green.

[@briancooks80]

Nice videos man! Keep them coming. I’ve been looking for an 18650 diy charger :)

[@snoutreviews3110]

im pretty in experienced with small electronics, generally speaking what size of wire should i use for my own project similar to this?

[@siryoneyal]

Can you post a charger for 4 batteries connected serial (giving 14.4 volt together) that is used for the drill

[@Sorin_DIY]

my next video will include what you need.

[@sorinmariusbuturugaru1085]

whats your opinion on using 1 module for charging two similar -brand new batteries ? thanks

[@Sorin_DIY]

hi. yes, you can connect 2 cells in parallel to one charging module. if the li-ion cells are new, it's better. you can also do this with old cells, but they need to be the same type, have the same capacity, same life-span, same charging cycles and use them in the same parallel configuration.

[@vladutlita1689]

Ba Sorin ! Esti destept , bravo ai creat un incarcator de baterii complicat si l-ai facut sa para simplu , dar accentul in engleza ma zgarie pe creer rau de tot !!! Ea si mai practica ,

[@TrollerCoaster1]

Chiar foarte misto ideea, nu m-am gandit pana acuma ca pot sa-mi construiesc un incarcator de baterii in loc sa cumpar unul. Nu era o idee mai buna sa iei un controller de incarcat LiPO mai bun, ca sa ai doar 1 pentru toate 4 bateriile ca sa poata sa fie incarcate toate la acelasi nivel?

[@Sorin_DIY]

salut. se poate si asa. insa daca probezi baterii diferite, cu capacitati diferite, unele pot fi chiar defecte, nu poti sa iti dai seama cat de repede se incarca sau descarca fiecare. daca o baterie se incarca si se descarca foarte repede, nu se mai poate folosi impreuna cu celalalte.

[@tanvirislamrobin2874]

Can I use only one TP4065 to charge severel battery? I mean, if I connect 2/3 battery in parallel and charge them with single TP4056 module, is there any problem?

[@Sorin_DIY]

hi. with 4 charging modules you can charge 4 cells individually. the cells can have different capacity, they can be discharged to different levels. you can put each cell in the charger at different times. all the cells will be charged much faster, with max 1A. not 1A divided to all 4 cells. if you want to charge multiple cells with only one charging module, the cells must always be connected in parallel (when you charge them and when you use them). the cells need to be the same type, same capacity, same lifespan, same charging-discharging cycles and they will be charged 4 times slower -> 1A/4=250mA each cell.

[@francisvicenzi]

Congratulations friend, beautiful work! Can you tell me the model of the notebook battery that you opened to remove the 18650? thank you so much.

[@Sorin_DIY]

hi. it's the original battery for the Asus K73SV laptop. aftermarket batteries have different cells with lower capacity.

[@francisvicenzi8933]

thank you friend

[@akbar0513]

Sorin please make it to battery analyzer 18650 to read mAh no load

[@electronic7979]

Excellent project

[@james10739]

Pretty cool I'm not going thru all that but I would have done something different for power and if you are worried about heat a fan

[@dannys2290]

thanks a lot! now i have something else i have to make with the batteries i have lying around. As if i didn't have enough projects i'm working on already :)

[@andrewvader1955]

I like your diy projects. Students could learn alot from your videos

[@Chris0612]

Thanks for this great Video, i will build this thing for sure. If i want the charge feature only, how do i have to connect the displays?

[@Chris0612]

I don´t understand the schematics with the wirering of the switch also :(

[@Sorin_DIY]

hi. if you want only to charge the cells, you need simple switches with 1 pole and 2 positions. the negative wire from the 5V charger is common. is connected to all TP4056 modules and all the voltmeters. the positive 5V wire from the charger is connected to all the voltmeters and to the switches. each switch will deliver the positive supply wire to 1 TP4056, so you can turn them on individually. the voltmeters sensor wires are connected to each li-ion cell positive terminal.

[@Chris0612]

@@Sorin_DIY Thank you, that helps quite a lot :)

[@Sandokans]

Salut Sorin.Pot face doar doua circuite dar numai de descărcare și fără încărcare?!As vrea sa am doar pentru 2 acumulatori dar numai descărcare ca am deja cu 4 sloturi de încărcare..ms

[@Sorin_DIY]

salut, da se poate.

[@glenngoodale1709]

thanks for sharing! keep up the hard work

[@giladit77]

Great work like always. Can you upload the drawing to the front panel?

[@Sorin_DIY]

hi. I don't have it anymore. the drawing was made in ms word but not with the exact dimensions, but only for reference. I marked the exact dimensions directly on the plywood.

[@luke_barreto9530]

Hey how to make a box for all de stuff

[@holyshit2709]

Very good video, I love the details.

[@CrazyCoupleDIY]

Damn , you are a genius

[@taunteratwill1787]

No Einstein was a genius, Sorin is a pro DIY'er.

[@axoselectronicalikee3230]

hola excelente vídeo , hay alguna forma de saber la capacidad descargada en amp, total de cada celda? mencionas que la descarga con esa resistencia va desde los 450mha pero baja con relacion al voltaje de la calda , es ovio pero daría un estimativo con relación tiempo , de la capacidad total hay algo mas exacto de forma casera que no sea arduino ? agregándole transistor q haga variar la resistencia así a medida que baja el voltaje .mantenga los amp de descarga , gracias y perdon no hablo en ingles saludos

[@Sorin_DIY]

Hola. para un cargador de celda DIY 18650 es difícil medir la capacidad exacta. Puede agregar un módulo de prueba de capacidad barato de China. Otro método impreciso es agregar un convertidor reductor, bajar el voltaje de la celda (de 4.2 ... 2.5V) a 2.5V estable. luego conecte una carga de 10 ohmios. consumirá 250 mA hasta que la celda se descargue. digamos 6h. multiplica 2.5V * 0.25A * 6h = 3.75Wh. divide 3.75Wh al voltaje nominal de la celda, que es 3.6 o 3.7V; 3.75Wh / 3.6V = 1.04Ah. pero esto es impreciso, porque la eficiencia del convertidor reductor varía según el voltaje de la celda. cuando el voltaje de la celda se está reduciendo, el convertidor extraerá más corriente de la celda para mantener una salida estable. entonces su eficiencia fluctuará probablemente entre 95-85%. así que en realidad la célula tendrá 1.1Ah o 1.2Ah ... (google translate)

[@limtk55]

Whatever in the world happened to cable ties for wire management?

[@giladit77]

Hi Sorin, is it possible to charge one or two batteries at a time or do I have to charge all 4 together?

[@Sorin_DIY]

you can put and take each cell at any time you want.

[@yone2002]

Should use a aluminum base plate as a heat sink. That way you can enclose the enclosure

[@haydenc2742]

2.2K gives right at 500mA, I love those TP4056 charger modules Such a great build and very clean an innovative...GREAT JOB! That battery protection circuit on the charger will protect the TP4056 from reverse flow and killing the charger module (ask me how I know ;) )

[@taunteratwill1787]

Brian C Being a marine you probably did something stupid, right?

[@haydenc2742]

I was also taught if it's stupid but works...it ain't stupid...

[@sammy-pp1gl]

Hi Sorin ,i am very much interasted in this project , i have all the parts except the heat resisters ,can i use a 10w 15ohms rs instaed ofthe 10w10ohms ..your advice plaease thanks ...

[@Sorin_DIY]

hi. yes you can use the 15ohm resistor. but the discharging process will take longer. when the battery voltage is 4.2V, the 10ohm resistor is discharging the battery with 420mAh. with the 15ohm resistor - 280mAh

[@Spo0cky]

Wow, you have my great respect for your craft. Greetings from Berlin.

[@tahirtrs3147]

hi. Sorin nice vid again. i want to make universal battery charger. so for AA AAA and 18650 battery's. is this possible. i cant find a adjustable battery holder for it and the module

[@Sorin_DIY]

Hi, are you planning to charge only li-ion cells? or Ni-Cd & Ni-Mh as well, because it will become pretty expensive. I can't find a adjustable battery holder, but you can buy a simple cell charger and use only the battery holder, it's very cheap: s.click.aliexpress.com/e/_DkM0lm5

[@FabRecUp]

Another very nice project, that i will reproduce in the future 😁

[@dennisvandenbroek1725]

Is it possible to add a volt amp meter like in the PSU video?

[@Sorin_DIY]

yes. in a future video I will make a charger with balance feature for battery packs. this will include an ammeter.

[@DatMilu2K]

Great channel! Glad I found it! :)

[@guiterman6263]

Nice job dude

[@HomeSchoolU-2]

Excellent presentation, educational and well spoken. Beautiful tool, too. I like the wood. I'll need to watch a few more times with pencil and paper! A schematic would be nice for those us climbing a steep learning curve..;- )

[@taunteratwill1787]

Robert Thomas He sais 6 dollar for every unit (wich is 4 times) 24 dollar, that is without the wood, glue, wiring etc. Do you know the amount of various 18650 chargers you can buy at AliExpress for 24 dollar? Save yourself the trouble i would say.

[@Ale_giro]

Taunter Atwill I bought for 8.50€ (9$) a double usb battery charger for AA, AAA, 18650, 26650, 18500 and more, which works with usb/pc or wall. But no display, only green or red leds. For 12.90€ double battery plus decharging function, or for the same 12.90€ a 4x slot. This DIY isn't very cheap but it's nice. I would build one, if i could understand if i may install a spring as size adapter and use it for any kind of batteries...... Once you buy a 10x pieces of a component, and assembly only 4x, you spend the same amount of money for a 4x or 10x!

[@carlnikolov]

Dear Sorin, I am trying to build your design!!!! Where can I get the same ROYAL 221 Resistor with both input and output pins on the same side of the resistor like in your video? Your link shows resistor with input and output for the resistor on opposite ends. Thank you!!!

[@Sorin_DIY]

hi. I've bought the resistors from a local store. I don't know if you can find them online.

[@carlnikolov]

@@Sorin_DIY Thank you for your help.

[@acoustic61]

Very Nice! I want to build a one or two cell charger with these modules. I currently have a cheapo single cell charger that plugs in the wall. It's takes like 24 hours to charge a cell but that's okay because it doesn't stress the batteries. I was wondering if I could slow the charge the charge rate of these modules. You've answered my question. I will have to change the resistor from pin #2 to ground. I'm also wondering how your volt meter displays two digits after the decimal point? Is that automatic or programmable? Or maybe a specific to the product? Thanks!

[@Sorin_DIY]

this type of voltmeter can measure the voltage with 2 decimal places up to 9.99V. and from 10.0V it switches automatically to 1 decimal place. it's pretty good.

[@milanacmyoussef2835]

Hi I would like to know if I can put 3 18560 batteries in serie and charge each one with a tp405 in parallel with the batterie. Thank you very much

[@Sorin_DIY]

hi. yes you can charge them like this. but you need 3 different power sources for the TP4056 modules. not 3 switch mode chargers, because they will be connected to the same supply current from the mains. you need 5V chargers made with transformers, or a transformer with 3 isolated 5V outputs.

[@carlnikolov]

Would it be easier to use female terminal for switches?

[@Sorin_DIY]

I don't think so. you still need to solder the wires to the terminals and it will take more room inside the charger.

[@carlnikolov]

@@Sorin_DIY You're right, and if you don't shrink wrap them, perhaps when you bend the pins you can short the terminals by mistake?

[@Hoan-teacher-John]

best of the world, never seen it before

[@albaharh]

Love your work bud

[@shadkaamahmed9931]

Can we not use just one charging circuit for all the cells??

[@Sorin_DIY]

hi. with 4 charging modules you can charge 4 cells individually. the cells can have different capacity, they can be discharged to different levels. you can put each cell in the charger at different times. all the cells will be charged much faster, with max 1A. not 1A divided to all 4 cells. if you want to charge multiple cells with only one charging module. the cells must always be connected in parallel (when you charge them and when you use them). the cells need to be the same type, same capacity, same lifespan, same charging-discharging cycles and they will be charged 4 times slower -> 1A/4=250ma each cell.