DIY - BMS Protection Board made with TP4056 modules

Hello, and welcome back! Today I want to test a "Battery Management System board" made with TP4056 charging modules. Is it any good? Let's test it!
A big Thank You to my patreons, especially to: Eric Miller, Andrew Rotariu and Jacek from Poland :)
If you are a nice lad and want to donate to me on PayPal, here you go: [e-mail]
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Components list:
TP4056 charging module: s.click.aliexpress.com/e/_9hTxou
32V small digital voltmeter: s.click.aliexpress.com/e/_DmD...
18650 cell holder (similar): s.click.aliexpress.com/e/_DBi...
2W10 2A bridge rectifier: s.click.aliexpress.com/e/_A4fRqm
4700uF 16V capacitors: s.click.aliexpress.com/e/_Dkr...
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[@supersilve]

Sorin, this is the first video I saw from you. You explain very well and make things clear so that everyone understand fully what you are doing. Thanks for the interesting video.

[@didnotkn0]

I just found your channel a few days ago and all your videos are great, informative and fun to watch. Keep up the good work!

[@computerman8424]

another wonderful video. was wondering how these boards would behave in a series configuration. Thanks for this educational video! Keep it up :D

[@markjovanpaye1303]

Thanks Sorin, I haven't solved the shorting on inputs of TP4056 until I saw this video. I constructed my own powerbank and UPS for my laptop...thanks a lot for your diagram and test done on your video. I had learn a lot from it. Keep it up!

[@edwardleonard3465]

Thank you for making these videos. They're educational and entertaining and they've made me comfortable enough to try some stuff that worried me before. Thank you!

[@kacpreusz9911]

You make the best tutouriuals. They explain everything, they have humor, and i can no problem figure out what are you saying. By that i mean your english is very good, near to perfect.

[@PatriotPaulUSA]

Really good video. It gives us all a much better understanding of how these lithium 18650 chargers work, as well as their components.

[@sidyajv]

Fantastic demonstration, really liked it.

[@ramudu4410]

I saw ur video first time and ur so informative thanks bro

[@MBT433]

Bravo Sorin cotinua tot asa 👍

[@morosanvalentin2524]

asa..bate-ti joc si tu :p

[@englishrupe01]

Great video....thanks. Love the technical skill mixed with humor.....perfect.

[@keithking1985]

wow Sorin your channel has grown since i 1st subscribed!! May it keep growing... class video!! just one thing the 2nd connection diagram you showed the TP4056 module's didn't have discharge protection just over voltage protection. there two types!! the better one has more chips(3 chips) on the board. for those of you new two this module & are looking them up/buying online, get the one with 3 chips on the board because it has the over & under charge protection. hope this helps!!!!

[@temelius86]

Yes, there're two type of this modules. The modules in the first diagram have also discharge protection and in the second diagram have not, because there are no output pins on them. They are only for charging process. The first module that never works again after short circuit can be broken, because the other three modules are still working. I wonder where is the output voltage of this module supply from. Is it show 5v when power in and the battery connected and 4,2-3,7v when only the battery connected, not the power in?

[@rhiantaylor3446]

I was thinking of building something like this using hand-wound secondaries on a toroidal transformer. Benefit is that each "cell" is isolated from others so the outputs can be connected in a series string as in a Ebike battery. Also allows the voltage into each TP4056 to be kept to the minimum to achieve a full charge, to reduce dissipation.

[@coolgamer1989]

i did same thing using different 5v power supply from usb chargers up to 2A each, and used 2 TP4056 for each charger to balance batteries up to 2A, i use this to balance Ebike and electric bikes batteries, and really worked great for about a year, did one to balance up to 20s battery packs :)

[@ronaksoni2729]

learned something new about tp4056 boards 😄😄

[@electronic7979]

Very good project 👍

[@joakoc.6235]

I did that same circuit that you did, but with independent 5v switching power supplies, the problem is that when one battery cell goes below 2.5v with a discharging current over 1 amp, the TP4056 blows up, it will overheat and burn out, the charging light stays on and the 5v input now outputs the voltage of the battery, like what happens when you do the short circuit.

[@Delali]

I love the comic relief and jokes. I see you have an interesting personality

[@valentinpopov1114]

I think the idea is great and helpful. I planed to build this for a while... I am using imax b3 that work probably exactly the same way, but i dont think I can hook them up in series. This thing wouldn't be a problem if you have 5 4s chargers... Just to connect them in series to get a 20s for a fast ebike for example. The con is... Power consumption for thee transfermer... I was liking forward to see you measuring consumption. Before the transformer and after it and... And after the full bridge rectifier...

[@shawnsmakershop2099]

SORIN! You stole my idea for dedicated output windings! Great minds think alike I guess.... I was planing to use a toroidal transformer. I'll subscribe:-)

[@jamesallen6007]

Excellent. Thanks for your help. I have subscribed to your channel.

[@mitrut-gv1mr]

Felicitãri, Sorine.

[@Bianchi77]

Nice video, thanks :)

[@ahmadarju520]

You have the best precision tool

[@lixelixe7694]

cel mai bun videoclip care exista pe youtube...esti profesor! good job! multumesc ca ai facut acest video!abia astept sa am timp sa ma uit si la celalalte!(ce rasa este felina?)

[@Sorin_DIY]

salut. birmaneza

[@Maria-ph2jd]

Yuhuuuu ,felicitări!

[@cheetahkid]

I made one with 7 x TP4056 and with SMPS x7... seem to work, avoid short cct or reverse battery, they can get damaged.

[@BarbaroR4]

another good project

[@anshuyadavsitaram7053]

Nice project and your cat looks cute

[@davestech6357]

I've seen people do this before. What they always miss is a diode across each charger output to avoid negative voltage going into the charger when one battery drops out under load.

[@mwint1982]

Diode across the battery output B+/- or the OUT pins?

[@col8981]

That's an impressive soldering poker

[@rpbajb]

Good video, very informative. I'll be careful not to upset you, I don't want to get "a little busted". 1:03 LOL.

[@lucasbernard5304]

could I use 3 step up boost modules to connect to the tp4056 from 5v instead?

[@nabadeep09]

After connecting a 3Amp, 2 series BMS circuit to 2 Li- batteries in series , now when checked with multimeter for connectivity check between B+ and B- points in BMS, surprisingly, the multimeter buzzer beeps . Why B+ and B- are shorted when I connect the 2s li-batteries in series with BMS??

[@TBL_stevennelson]

It would be great if you could design the protect short circuit and add it. Some people may also put the battery in upside down.

[@brawlstarsplayer6616]

Super video!

[@MrBrymstond]

You can use separate phone chargers and wire the cells in a series. I did it.

[@sergeantcrow]

Brilliant ! We to be a good friend of this guy after the Apocalypse.....

[@abdulwahid8579]

Good job

[@wintechblog6066]

Salut,ai putea face in viitor un video despre convertirea unei trotinete normale intr-una electrica?

[@FabriKzeiraDIY]

thanks dude I was looking for this a long time.. I'm thinking to use that on my cordless tools, but that long wait time to charge batteries😞

[@Netsroht72]

According to the Datasheet of the dw01a Protectionchip, that is on the 4056 Board, there is a short circiut Protection. Dont know why it isnt workt in your case.

[@sadsaeqwqwrwqrqwr2639]

Bu modülleri seri bağlayarak kullandığınızda, pillerden biri bittiğinde modül içerisindeki elemanlardan biri çok ısınarak yanıyor. tahmini açıklamam ise çıkışı kontrol eden mosfet sürekli kapanıp açıldığı için üzerinden geçen akım ile mosfet'in direnci arttığı için ısınıp yanması.

[@wendellteles9081]

Very Good Video.👍

[@yuriinosach5582]

Buna seara! Enjoy your videos. A question: working with perfboard, where do you prefer to solder the jumper wires, on top of the board or underside?

[@Sorin_DIY]

Hi. I prefer to solder the wires through the back of the board. but depending on the position of the perfboard they can also be soldered on the top.

[@amplificatoaresiboxe5846]

Great video

[@diyexplorer8728]

Nice project and your cat too.

[@noelj62]

Good work

[@milvolts1]

Who used the cat as a star of the show first, Average Joe or Sorin the Nerd..hmmmm🤔...don't matter, both are geniuses and great to learn from. Love you both. Great video Sorin p.s, put that cat on a high resistance training diet.

[@hycron1234]

4:23 - Cat: _"I'm not fat I'm just fluffy!"_

[@wreckless_-jl6uu]

Pretty neato!!

[@DonJuanH234]

Hi Sorin, I'm teaching my kids about electronics and we love all your videos, you give great details on everything. Question: what software are you using to create your schematics?

[@Sorin_DIY]

thanks. I use microsoft word to make the schematics. I know it's not made for this, but I think it looks good on the video.

[@DonJuanH234]

Thank you

[@Drxxx]

I made last week video about tp4056 18650 battery charger.. works amazing!

[@bibhasmetia4683]

Good luck for 1M sub. Sir I guess you can get 1M soon have a nice day sir

[@cristian.duluman]

Good job!!!

[@prongs82]

How do you balancing parallel battery?

[@gs637]

Excellent, bravo Sorin.

[@SnehasishDebnath_remo]

Hi, can make a video of salvage a laptop bms, if its working fine.. how to find +ve -ve terminal for battery and power

[@md.abdullahalmehediprince3016]

Do upload a video about PAM8404 mini amplifire with speaker details ?

[@estuardo2518]

Can you do or review a contactless thermometer

[@cihangulseren]

We are on follow Sorin. very nice projects

[@corneliussianturi476]

Sir, I want to ask how about charging this battery at pararel but, still, use you diagram to charge it hmm when come in discharge, use another BMS for higher load discharge rate would it work???

[@aamir0801]

Nice and much appreciated....but a question here why haven't you mention that you are showing two different board in different schematic.....????? asking because its confusing and will not work if picked wrong board

[@Sorin_DIY]

hi. you are right. in one of the schematics I use the charging modules without over-discharge protection. I forgot to mention that.

[@robertbeasley638]

Enjoyed your video. Do you know of another way to electrically isolate the power? I wanted to use a solar panel to charge a 4 battery bank. I need 9v though to run a device. Thanks for the help

[@Sorin_DIY]

hi. you can use DC-DC isolator converters, but they are very inefficient, I don't recommend it. I would prefer a 18V (or higher) solar panel, or more in parallel. a MPPT controller or a step down converter with current limiting (this is less efficient). a 4S battery pack with balance charging. and finally another step down converter for your load.

[@R3DE3MER]

Ive been thinking about these for a solar charging configuration with some salvaged 18 volt panels i found at work. Think they would work in such a way or would the panels not have enough current for it?

[@Sorin_DIY]

these modules are not good for solar charging. for a cheap low power solution you can use a step down converter with current limiting and a BMS protection board for a battery pack

Good video

[@sweetcollegegirl960]

I like ur precision tool

[@tabaccopuro]

Sorin, you are not just any geek, you are a genius geek. Not many folks know how to unwind and wind transformers in my area. I would love for you to tackle a solar lighting project using 18650's. I use them for lighting in the yard, but I have others working as power failure lights inside. I'd like to see your geek approach. :) I am still working on getting the right combination of motion sensor, for the interior lights, and regulating the on time to my liking. Can you help with this?

[@Sorin_DIY]

hi. in the summer I will make one or more videos with small solar panels.

[@AdiProMusic]

Bravo Sorin. Continua pana tot Sa trăiește 1000 de ani fără reparații

[@transporder]

very good video bro... thx

[@stefan7078]

Bravo Sorin Faci o treaba buna Mai postează și pe canalul de mecanica *~Keep up the good work!~*

[@StefanAST]

damn, am si uitat de vechiul meu canal :))))))))))))))))))))))))))))))))))))

[@b.alexandru]

Primu', Sorin.

[@domoledlight]

Hello Sir thank a lot for your videos that very helpfull . I have a lot of questions for my futur project . Can i Do the same project with this module XL4015 in serie with multi isolated ac dc power supply . 1) i have a drone 3s 5200 mAh 100c battery to charge what would be Current Amp to balance 1 cell safely.

[@titusphilip1310441]

i have done same thing like you but i never used transformer. i connect each bms to different phone charger.for 4 tp4056 you need 4 separate phone chargers.

[@Randellallen65]

Good info...

[@techbarron7383]

what a,beautiful explaination at all the time,,,and a little bit funny, and,,,speacially,,the verry cute cat,, she? or he? helps sorin for whats his doing all the time... but,,,why? is it get hungry?,hahaha, thank you for the video sorin.. it been too long to wait another video again..

[@nizarsakr6584]

هل من الممكن ان نسحب تيارا كهربائيا من بطاريه وفي نفس الوقت نعطيها تيارا شاحنا ؟ وكيف ممكن تطبيق هذه الداره بصوره عمليه ؟ شكرا

[@simonlagann8178]

what is the extra resistor you put on the board ? and what is it function and value ?

[@Sorin_DIY]

hi. I replaced the programmable resistor on the charging board with a 2.2Kohm resistor, to decrease the charging current to 545mA

[@divikumar5475]

I love your precision tool😂😂😂😂😂

[@doggo7567]

The TP4056 protection circuit board you used has short circuit protection

[@mariuspopa7428]

Salut Sorin ai putea face si un spot welder? Ar fi interesant

[@hansdegroot652]

That was fun tp4056 in series :-) Is there a way to do the isolation without a transformer? For use in a solar setup? Since that is all DC we would have to make AC and than go back to dc.

[@Sorin_DIY]

hi. another option is to use DC-DC isolated converters, but they have a low efficiency so it's not recommended. you can use a solar panel and a CN3791 solar charger and a 6V/9V/12V solar panel for each lithium cell. this method will have a better efficiency, but will cost a lot. the most efficient way is to use a solar charge controller. and the cheapest way is to use a buck/boost converter and a BMS board.

[@hansdegroot652]

@@Sorin_DIY Hi. thx for your reply. I am just fooling arround with 4 old solarpanels on my shed old batteries from where I can get them. I am using buck converters to get the voltage down. I have 2 42 volts and 2 +- 35 volts panels. The are just stupid voltages giving me headaches. My e-mopet has a 48 volt battery (which means it is 54 volts) and the charger can peak to 60 volts. Most you tube examples go to 30/35 volta examples max andso far I am to big a electronics noob try to change the exmaples into something that works for me. Lots of magic smoke. Today I tried to make a flyback buck converter to convert 54 volts to 12 for the electric moped. But burned loads of mosfets and 3904's Try again tomorrow :)

[@nicksimpson5256]

Great video, great job! You have a fantastic channel! I have a question for builds like this, with 18650 cells. Most charging chip-sets (tp4056, dw01 etc) will charge the cell at 4.2V (which is the top limit according to the cell's specs) and some even more (4.25 or even 4.30) putting a very high strain on the cell.. since the charging chip's parameters cannot be changed, if i wanted to finish the charge cycle at 4.15V just to feel safer, if i put a resistor between one side of the cell and the charging board, would that make it stop the charging at lower voltages than 4.2V..? And the same for discharge.. is there a way to increase the lower cut off voltage to 2.7 or even higher so that the cells don't get so stressed? I don't care if I loose some of their capacity.. just want to feel a bit safer for their parameters...

[@Sorin_DIY]

hi. I don't think it will work with resistors. resistors will decrease the current. if you connect a resistor in series with the cell and charge it, the charging current will be lower. and near the end of the charging cycle, the charging current will be very low, so the difference of voltage before and after the resistor will be very small. it will charge the cell with a lower current longer time, until the cell voltage is 4.2V. and for the discharge cycle I don't think the protection IC will read correctly the voltage and current, so it may not work correctly. if you want to power you project with 1 cell, there must be other solutions. for example you can use this module for over-discharge protection: www.aliexpress.com/item/32788948905.html?spm=a2g0o.productlist.0.0.266c7eee3jze8x&algo_pvid=acf82334-569f-4c28-b4ae-57b0187fa6dd&algo_expid=acf82334-569f-4c28-b4ae-57b0187fa6dd-36&btsid=0ab6f81615901736350356638e1753&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ Over discharge voltage:2.54±0.1V it's not a big difference, but it is a little better than TP4056. or if you need 5V for your project I recommend this module: www.aliexpress.com/item/32885492747.html?spm=a2g0s.9042311.0.0.27424c4dr4JFVo it charges the cell to exactly 4.2V and it has over-discharge protection at 2.9 - 3.0V. I made a review of it and I will post it on my Patreon page soon.

[@nicksimpson5256]

@@Sorin_DIY you are amazing! Thank you for your quick and detailed reply! I will have a look on the products you suggested! Thank you!

[@erickaustin7162]

my question is, what if i charge lifepo4 3.2V on TP4056? does the module recognize the battery with 3.2V?

[@Sorin_DIY]

no. it will damage the battery.

[@piotrdabrowski6534]

Can I use those moduoles and a BMS at the same time, I mean using modules for charging and a bms for short circout and overdischarge?

[@Sorin_DIY]

yes

[@piotrdabrowski6534]

@@Sorin_DIY Thanks :D finally I can build a big battery pack without worrying abaut burning my house down. Your video helped me a lot, same as previous videos!

[@mwint1982]

How can we raise the discharge cutoff to 3.0V (from 2.5v)?? It would also be nice to lower max charge from 4.2V to 4.0.. possible?

[@Sorin_DIY]

I don't think that is possible, these features are controlled by the chip. you can try to add a low value resistor between the battery positive terminal and the module. this may work for the over discharge protection, because under the load, the module will read a different voltage value than the cell really has. you can try with different resistors of a few ohms and different loads.

[@mwint1982]

@@Sorin_DIY there is such a high demand for it. You would think the chip manufacturers would listen. 2.5V is stressful for these cells

[@bengkeljiwa4924]

Its possible to connect tp4056 input voltage in series single supply 16.8v??

[@Sorin_DIY]

no

[@marcrives279]

Hi! Have you thought about using DC-DC Isolator instead of a big transformer ? Like B0505S (Max 1W out) or more powerfull?

[@Sorin_DIY]

hi. isolated converters will work, but they are not efficient or powerful. for 1W you can charge the cell with maximum 0.2A. so you need to modify the programmable resistor on the TP4056 module to always charge with max 0.2A, which will take a lot of time for big capacity cells. for these isolated converters you always need to have a load connected of minimum 20mA and max 200mA, otherwise they will burn. other disadvantage is that they usually get hot when used. you can find isolated converters a bit more powerful, of 2W, but they suffer from similar disadvantages.

[@marcrives279]

​@@Sorin_DIY Thanks for the answer! Appart B0505S, better spec DC-DC Isolator are expensive!

[@carsnboys]

hi. after disconnecting my laptop charger my batter dies in 5-7 minutes. so i remowed my laptops batteries when i checked them it varies 3,82 - 3,83 3,84 - 4,07 so i charged with tp4056 so i have some question 1- how long should i charge them 2 how can i understand they are charged fully 3 after a 10 15 minutes charging some of my batteries decreased 4,07 to 4,02 even they are free (not charged or used) is that normal? 4 what can i do apart from those techniques ( by the way i am not experienced of electricity i just watch videos :) thanks from now on

[@Sorin_DIY]

hi. first you should fully charge the battery connected to the laptop, with the laptop turned off. check the voltage of each cell. if it's not close to 4.2V, the cells are probably very used. you can try to charge them with the TP4056 charging module. this module stops the charging automatically when the charging is complete and the green/blue LED turns on. then try the battery in the laptop again, but most likely the cells are very used and there is nothing you can do with them. the best way is to test the capacity of each cell with a good charger, so you will know if there is any capacity left in them.

[@lixelixe7694]

Poate daca legi modulele in serie prin diode nu se mai arde modulul dar sa nu uitam ca pe o dioda (gen 1N4007) cade 0,7vx*3=2.1v 16.8v-2.1v=14.7v sau Dioda Schottky parca cade mai putin pe astea (si teoretic cand pui in scurt daca trece de 1A ar trebui sa se arda una din diode)

[@Sorin_DIY]

tot se arde. cand o celula se descarca si protectia o deconecteaza, tot curentul din circuit trece prin modul si tot o sa arda integratul. chiar daca trece si prin diode.

[@abdullaalmasum4945]

Almost a year, can you tell me please.... I want to make the battery pack separated and the charger separated. .... Just like 7:27, I will only connect the battery pack to the charger when its drained. In this case, can i use a BMS with the battery pack? I want to use the battery separately with bms for extra protection, and i want to charge the whole pack (through the bms) by the charger. Is it possible??? Please answer 😢.

[@Sorin_DIY]

yes. it's better to connect the battery pack to a BMS board for protection. and you can charge it with TP4056 modules.

[@abdullaalmasum4945]

@@Sorin_DIY thank you so much!,😁love for you from Bangladesh 🇧🇩

[@vikramdhiman3865]

Nice

[@jamess1787]

Love it. Wheres the Carlsjuice?

[@Maria-ph2jd]

😂

[@KetansaCreatesArt]

I used the TP4056 modules in my DIY flashlights for charging the 18650. I found that the module keeps discharging the cell even when not in use. The cells always went to 0% within 3 or 4 weeks. It is not regarding one or 2 particular modules. I tested many, and they all do the same. Then I had an idea. I added a switch that disconnects the TP4056 from the battery. And another hidden switch which is only used for turning off the LED while charging. Now the battery holds the charge for more than 6 months. This is the best idea so far. But then so, I want to ask you, do you know any onboard/offboard modification for the TP4056 so that it wont drain the cells constantly? Thank you.

[@Sorin_DIY]

hi. I never had this problem with TP4056 modules so far. it shouldn't discharge the battery in a few weeks. are you sure you've done the wiring correctly? I built a lot of powerbanks, portable speakers and other devices with TP4056 and they don't have this problem. what other components did you use in your project?

[@KetansaCreatesArt]

@@Sorin_DIY Hello, I used XML L2 LED, the 5 mode driver, TP4056. I was using a switch just before the L2 driver, like it should be. It drained the battery. Then I decided to totally cut off the TP4056 with switch, as a main switch. Now its perfect. Then I also did the same changes in older projects and the batteries stopped draining.

[@md.abdullahalmehediprince3016]

How did u make ur iron ? plz upload video .

[@Sorin_DIY]

hi. my soldering gun it's not home made. it's a romanian soldering gun from the '80s.

[@ericgillespie2812]

So I. Making a bms for a 6s2p diy battery if I use a laptop power supply. It should be in theory constant voltage yeah? But the amperage needs to be enough to supply an amp to each charger module?. So one 6s2p needs 6 modules and a supply of 5v and 6 amps to give all 12 cells .5 amps? If I'm understanding this properly...

[@Sorin_DIY]

are you making a BMS with TP4056 modules, or are you using a standard made 6S BMS?

[@ericgillespie2812]

@@Sorin_DIY I'm using the tp4056 modules because I want to learn more the 6s BMW would be easier but not as much fun.

[@Sorin_DIY]

if you use TP4056 modules you need individual isolated 5V power supplies for each module. you can't use a laptop charger for all the modules.

[@Kastoraki]

Salut Sorin, ce faci? How much load current can deliver this TP4056 chip? I have modified an old cordless screwdriver with a single Li-ion cell and since i can't find a BMS that can stand the 6A max load of the motor someone suggested to buy this chip. But I don't think that is suitable for this job....

[@Sorin_DIY]

hi. the TP4056 module with protection cand deliver maximum 3.5A from the battery. you can use it only to charge the cell. you can add a separate 1S protection board with 7.5A

[@Kastoraki]

Multumesc mult Sorin pentru raspuns. I was thinking the same, just there is a difficulty in finding such a BMS in shops ( i don't like shopping online).

[@carsonpoland]

is it possible to charge whole liion packs with it? 3s or 4s

[@Sorin_DIY]

yes

[@krlenjuska]

Sorin where did you find voltmeter with precise measurement of low voltage? All voltmeters that i found are not precise with low voltages.

[@Sorin_DIY]

hi. I've bought it from a local store, but I think it's this model: www.aliexpress.com/item/32957070981.html?spm=a2g0o.productlist.0.0.69106450uJP3ZJ&algo_pvid=90f9dc54-0ce2-45ce-8423-89484a413bf2&algo_expid=90f9dc54-0ce2-45ce-8423-89484a413bf2-54&btsid=dcba0d66-8ab2-4e8f-9b0c-957812fdbbc2&ws_ab_test=searchweb0_0,searchweb201602_5,searchweb201603_53

[@ciprianbeniuga5042]

Sorin - DIY Electrical Nerd Hi Sorin . I wonder if your local store has a web site a swell. That’s because I live in Sweden and I have 1-2 projects and it’s veery difficult to get all parts in time . I ordered a couple off things from China but it takes forever to arrive and in the other hand it’s to expensive because Sweden post take import taxes for everything. For example if I buy a pen 🖊 that cost 1 dollar I pay near 80swedish crowns (7-8 euro) . Because I’m from Romania I can ask someone to send In Sweden . Much faster , much cheaper for example . I still waiting a 10s smart bms and other stuff from China ordered 1,5 mounts ago . Some packages are already here in Sweden and they not deliver until I pay taxes and tva for each package . Very nice country with stupid rules .

[@station240]

Get yourself some Polyester Tape to use instead of the masking tape. It's the yellow tape used in switch mode power supplies, comes in different widths, and is cheap. Using masking tape is just a bad idea, it comes loose after a while as the glue gives up.

[@rpbajb]

Agreed, masking tape is a poor choice, transformers can get quite warm. Kapton tape would be best, but it is more expensive, of course.