This board is not really a Battery Management System, it only fakes the signals to the yellow connector; communication with the Makita charger to enable charging. And only the total pack voltage is monitored, not per series cell (normal Makita pack is 5 series and 2 in parallel; 5S2P). Mostly there is a temperature switch in series with the charge terminal and the B+ terminal to prevent overheating during charging. The PCB is powered from the first set of series cells at 3.7-4.2V, between B1 and B-. Therefore, this board has only three connections to the pack. The problem is that these first cells are then (more deeply) discharged by the standby current of the electronics, damaging them over the longterm. At the beginning of the battery pack development Makita designed there "BMS" boards in the same way. But nowadays these are improved with a full balacing protective BMS form Lapis Semiconductor, temperature sensor, potted in protective material. But okay.. these Chinese packs do work for some time, rather cheap..

@JhonFreddyDelgadoOrozco

2 жыл бұрын

No lo recomiendas para trabajo verdad?

@gd.ritter

29 күн бұрын

@@JhonFreddyDelgadoOrozco Correcto. Esto no durará mucho tiempo.

Комментарий в поддержку канала и ролика, а также труда мастера.

@gear_show

3 жыл бұрын

Благодарю вас!

The advantage of 18650 Batteries is that they are made of Lithium Ions. This means that 18650 batteries can be recharged an average of 600 to 1000 times without damaging or losing effectiveness. Another advantage is that they have zero or practically zero self-discharge.

@gear_show

3 жыл бұрын

Yes, that is right, thank you for sharing!

I have bought a very similar case (looks like it is from the same factory) for 14.4v Hitachi. The screw that holds the PCB was too long, and I punched one Cell when I was installing it. Resulting in an internal Short of that cell. It was super Scary, as I had a moment to find out what happened. I disassembled the pack as quick as I could with gloves and sperated the cells. The cell was super hot until it had no energy left.

I like it, thank you so much Mr. GearShow

This makes more sense than spending $200-300 on extra batteries? Thank you gear show.

@gear_show

3 жыл бұрын

You're welcome!

@Fekillix

3 жыл бұрын

You can get two genuine Makita 5Ah batteries for $180 with a tool when they have a promotion. Better than using batteries with Chinese BMS boards.

@troyna77

2 жыл бұрын

@@Fekillix Could you repair your own self made battery packs? This type of knowledge is building self reliance and confidence. Making and repairing your own batteries and tools is what gear show is all about.

@troyna77

2 жыл бұрын

@@Fekillix and the newer tools will need activation in the store that you buy them in. This type of tool production is called planned obsolescence.

@Fekillix

2 жыл бұрын

@@troyna77 New tools will definitively not require activation, it is just something Home Depot wants to prevent theft from their stores. If they do get brands on board just buy outside Home Depot. You can repair original batteries. But your homemade batteries will last much shorter than original batteries since it does not have any form of cell balancing. Third party batteries can actually be quite dangerous there is a lot of potential energy in a lithium pack. I have Makita batteries that are five years old and in daily construction use.

Fantastic you know your way round them battery packs 👏 👍 👌 😀

1:24 - range 200V is not optimal for that measurements ;) 20V will be proper

@lukie4ever

2 жыл бұрын

He normally does that

I didn't know you could get a kit like this. Thanks for sharing. I would point out that you did not use a Makita Charger. I've been trying to build Makita batteries and they work in the tool but they never work in the charger. So I just wire a standard balance cable on them and charge them in my 6S LiPO charger.

@aamjad2001

2 жыл бұрын

Could you plz let us know how to do the balance thing

Now can you make one for an 18v dewalt? I would gladly throw some money at that.

even though i still couldn't figure out how these nickel matrix strips connect batteries in the desired configuration, I still learned how to accurately apply stickers to things.

@gear_show

Жыл бұрын

I'm glad you learn something, thank you for sharing!

@sylviam6535

5 ай бұрын

I am not that clear either, but my best take is: - each row of 3 batteries is connected in parallel - a set of parallel batteries is connected to the parallel batteries next to it in series - this gives 7.4v + 7.4v + 3.7v = 18.5v when they are in turn connected in series

@lechiffre5452

3 ай бұрын

This is NOT a rocket science!

Great job! Question , would you happen to have a video on how mount that soldering extractor fan? And your spot welding machine too! Thanks for sharing

@nurjaya1477

2 жыл бұрын

Di sur xjd di ti

@nurjaya1477

2 жыл бұрын

E

Wonderful job thanks from UK

@gear_show

3 жыл бұрын

Many thanks!

Nice!!! 9 amps... I love it... I bought a "real" 5 amp Makita battery... Not cheap!

@gear_show

3 жыл бұрын

Sounds great! I'm glad you like it.

Thank you this was very helpful

@gear_show

3 жыл бұрын

I'm so glad!

@Gear Show... Great video, what brand is your spot welder and where did you procure it?

I will be trying this with the newer 21700 case

you did a good job! 👍

@gear_show

3 жыл бұрын

Thank you! 😁

@RESTORATIONOFSCRAPMETAL

3 жыл бұрын

@@gear_show You are welcome!

The king of battery 🔋 Mr gear show or Mr Battery 🔋

@gear_show

3 жыл бұрын

Wow, thank you so much!

Finally upload👏👏👏

@gear_show

3 жыл бұрын

Yes, I did.

Thanks for your useful information

Good repair, lovely spot welder. My only concern is that there is no balancing for the 5 series sets of batteries, as the board is a cheaper version

電池まで！！つくるんですね！

No balance leads. I wouldn't want to run high discharge tools from pack that can't be balanced.

@kosorind

2 жыл бұрын

original battery has no balance leads :) it is just checking 5 cells voltages

@jarosawpe4353

2 жыл бұрын

It's not that dangerous actually. I'd worry much more of total lack of heat shrinks or any other insulation on soldered joints. BTW I used to run couple of 5s packs with no BMS and charged them using Imax B6. After 6mos voltage difference between each cell was no greater than 0.01V, whereas I haven't seen a single OEM pack with BMS, where V difference was lower than 0,3-0,4V. More often than not, it was around 0,6-0,7V between each cell.

@jaywelker5566

2 жыл бұрын

@@kosorind it's 2021, not 2011. OEM Makita packs have had balance leads since "star protection computer controls" was introduced over 10 years ago. And pack longevity/reliability has been substantially better ever since. Makitas went from poor reliability to one of the best after they upped their PCB quality for better overheat, overdischarge and cell balance protections. We run over $10k in Makita equipment and I've taken plenty of broken tools/batteries apart over the years. Been a lot less broken batteries ever since we got everything updated to BL1850b and star protected tools.

@jaywelker5566

2 жыл бұрын

@@jarosawpe4353 it's not good for battery longevity. Any pack since Makita introduced star protection has been farrrr more reliable over time. We run about 30 5.0 batteries in our fleet of tools and they just don't fail like the old stuff used to. And never seen a single MODERN OEM pack get that far out of balance. They're dead on every time I have an opportunity to check them. OEM Makitas from pre-2011 and the Chinese PCBs based of that pack (without cell balance) would always have one pair of cells way out of balance compared to the others, because the PCB is powered by that first series cell rather than the whole pack. They were highly failure prone and I've rebuilt packs using these bootleg PCBs after the OEM threw a red/green error on the charger, they do not hold up like the OEM ones do. They aren't even adequate at protecting from an overheat condition, they let the battery cook longggg before ever cutting the battery rail. OEM 5.0s are so easy to get for next to nothing it's not even worth building hackjob DIY packs for our fleet. No sense in running weak link batteries on X2 tools anyways.

@jarosawpe4353

2 жыл бұрын

@@jaywelker5566 point taken, might even correspond with my tiny bit of experience. Those DIY packs w/o BMSes lived rather shortly, but I always blamed individual cell quality. Can't tell for Makita-grade or higher, as I've usually dealt with consumer-grade battery tools - easier to find them in mint physical condition, minus cells/BMS/bad solder.

21.5В после полной зарядки. Это перезаряд, получается по 4.3В при допустимом 4.2В. Быстро выйдут из строя аккумуляторы.

@gear_show

3 жыл бұрын

Да, меня это беспокоит.

@viktorstroylov3491

3 жыл бұрын

Это странная кастрированная БМС, но нормальная 5S 20A стоит копейки

@viktorstroylov3491

3 жыл бұрын

Кстати, ВАХ у этих батареек уходит вверх после полного заряда достаточно круто, так что от этого они не умрут. А вот от отсутствия балансировки - еще как)))

@user-hn4gr4ed7u

3 жыл бұрын

Купил батарею копия макита 18v на али -зарядил полностью мультик показывает 20.7вольт -это сильно плохо?

@user-jh7gz8gn7w

3 жыл бұрын

@@user-hn4gr4ed7u нет. Все нормально. По всем элементам проверьте главное что бы разбаланса не было

Those battery jumper connectors have those slits in them for soldering?

The tool and battery Corporations don't want gear show to show everyone how to fix their tools and refurbish their batteries. That's why the newer tools have for to be activated or they will not work.

Great! Looks like a cheap alternative. The big question here is how long it last? Don't know if those 18650 cells are real or fake. BTW, it was a nice DIY project!

@gear_show

3 жыл бұрын

Only me know the answer after I using it.

@yadaroni

3 жыл бұрын

If you get a smart charger for 18650's that has discharge and refresh functions, you can find the true MAH. If they are fake, the real MAH won't even be close to what they advertise on the battery.

@GianF123

3 жыл бұрын

As i saw in the video the pack is 5s3p so 3000 mA/h should be a real capacity.

@betasolk

3 жыл бұрын

​@@yadaroni Yeah, I do have one of those chargers and several cells recovered from old laptops. Only one battery was not original and its cells were all crap. The original ones had better cells, that despite the fact of being old, most of them can go over 2200 mAh. To be honest, I'm not sure about this kit. It includes 12 cells, the chip and case at only 15 bucks. Looks dirt chip for what it offers. Hope it works fine and last what's supposed to.

@pindrixsechon6311

3 жыл бұрын

@@GianF123 5S = 4.2V x 5 = 21V and 3P, if the cells are 3000 mAh each, it's a real 9000 mAh ( 3000 mAh x 3 cells in parallel ) battery, then the capacity is right ;)

that's a HUGE battery!

@gear_show

3 жыл бұрын

Yes, it is.

Muito bom!

@gear_show

3 жыл бұрын

Obrigado!

Missing paper-like isolation around positive pole. I've heard that metal plates can melt the plastic under high load and then short the cell.

Could you send me the link where you got the accesories, please?

Great tutorial. I'm about to create a video about that too. But 15$ is only the case. Those lithium batteries are not cheap - around 5$ per piece and you need 15 of them. Thats 75$ for the batteries + 15$ Case makes a total of 90$.

@creationsmv6201

Жыл бұрын

2€ per cell

@tech.inspector

Жыл бұрын

@@creationsmv6201 Yes for non-rechargeables but the others are heavily expensive

@qwerttyyw

6 ай бұрын

You can source them from second hand batteries, like scooter ones

How long is the charging time with that cheap charger? Nice video.

Wait did he convert all those to take the same battery pack? I’m assuming they were corded before? That’s really impressive. Subbed.

Can you post, where to get parts used to make it.. Also a good video would be converting a 12 volt tool to 18 volt..

Great job I have 1/2 inche impact 24v I wish you can rebuild battery for it

I'm so happy to see this!! Only a MILLION people have done this before you! Fucking hell, time for KZread to remove spammers! 😎

I got my LG MJ1 18650 3500mAh 10A cells for $3.75 on sale (May' 2023) . I think Makita also uses LG cells, but probably different cell models. IMHO This build makes only sense for 9Ah pack since you can get a 2Pack original Makita BL1860 (6Ah) for ~$175 on Amazon/Home Depot! if you're using your pack heavily with power tools, I still recommend to use the original battery because a home built one like this, as professional as you will ever be able to built it at home, will never reach the Ampacity and overall quality of factory made original Makita Batteries. I think Makita's specs are 20A continuously and 40 peak on their originals! This is a lot of Amps and it needs to be taken care of!!! One question I couldn't get an answer on though: in other YT videos you can see how an original Makita BMS has 3 contacts on the left of PCB and 3 contacts on the right side. Considering the 5S2P, this makes the genuine BMS on the PCB able to balance the cells per pair fully(1 negative and 5 separate +). Even though my AliExpress set looks a little bit different from this one in the video, it also comes only with on additional cable for balancing ( in this video dark purple)! How the heck can this board in the video balance all cells? the unused longer laps of those nickel strips (which I do not have in my set) are meant exactly for this but there're no instructions where to solder it on PCB or if the PCB is able to balance all cells at all even if you solder it. I found some soldering points on my PCB marked as TP1-TP13 but I am not sure if those points are meant for the additional needed balancing contacts!

Where did you get that spot welding device? Or did you make it? If so, how?

Nice!

thank you teacher

@gear_show

3 жыл бұрын

You are welcome

Great work, question is how to charge it, Are only connect 18v plus and minus or what

It’s a great video but, I would be reluctant to buy 9 of these cells (expensive) and not have a full BMS protection circuit board

I like all your vedio

@gear_show

3 жыл бұрын

Thank you! I'm glad you like it.

Thanks bro

@gear_show

3 жыл бұрын

You're welcome!

Cool and awesome

Muy buen video. Donde conseguiste la herramienta con la que soldastes las placas de las batería

@gear_show

2 жыл бұрын

Los compré en la tienda de China.

牧田款的电池，上次做的时候不小心短路了 把保护板都击穿了

Sir, do you mind share the link where to buy the complete battery kit.? Thank you..

@gear_show

3 жыл бұрын

I'm afraid the battery I bought doesn't original. But you can try it. detail.1688.com/offer/550188755852.html

@WhisnuBabehWe

3 жыл бұрын

@@gear_show Thank you, Sir.. I really appreciate your kindness 👍🏼

@WhisnuBabehWe

3 жыл бұрын

Thank you for those who have given LIKE to my message; hope it represented the same curiosity about the battery kit.. ☺️

@oorangejuce

3 жыл бұрын

Found one set on ebay for about 35$

@WhisnuBabehWe

3 жыл бұрын

@@oorangejuce Thank you for the information, Sir.. 👍🏼

is there a 20v dewalt one?

There are 2 mods I would like to see with this kit. 1: use Samsung lithium cells. 2: instead of the included logic board/battery controller, use an oem makita board.

@darkosvk

Жыл бұрын

Do you know where to get oem board? Seems like there is plenty on market but none is oem.

❤️❤️❤️❤️

@gear_show

3 жыл бұрын

❤️❤️❤️❤️

👌👍

hi what's your soldering point tools pls ? and which battery model is ? 21700 ?? ty

Kẽm đó mỏg quá chú ạ.

Great Video. Thanks. What is the Name of the device with wich you "soldering" the Batterys?

@mattsadventureswithart5764

2 жыл бұрын

"Spot welder"

@Soylimobile

2 жыл бұрын

@@mattsadventureswithart5764 thank you

Tuyệt vời

@gear_show

3 жыл бұрын

Cảm ơn bạn!

👍

Wish they made these for Milwaukee m18

My Makita tools will last me forever but their stupid batteries don't last with that chip inside of them that bricks the battery after so many charges or after the batteries have sat for a while. Wish I was as talented as you and could do this for my batteries.

Hello, can you put the exact link to the page to buy it?

Habrá también para dewalt

How did you got it ?

dùng mạch makita đời mới đi trời ạ. mạch này mà dùng sạc adopto trời ạ. đóng pin kiểu này gian hồ nó cười chết

What brand and model is ok battrey 18650 for makita ?

Stupid question, why is the battery configuration like 6+6+3 batteries?

It is possible assemble with 3.8v 2800mah cells? Do i use less cells?

Building battery JLD Tools impact how much?

Kak mau tanya mencari ilmu .. Klo pakai batre GZNS 2000 mah 6a 3c bagus gak kak . Maaf cari ilmunya

How do you get the stickers for the DeWalt tools

@gear_show

3 жыл бұрын

I redesign and print it.

With original charger will be working?

Hi, the website from the link is in chinese, can't read it. regards

Great.. just need to find out where to get the cells for a good price or real ones....

@gear_show

2 жыл бұрын

My experience is base on user reviews.

Why aren't there any balance leads?!?! Only one on one of the cells! That's dangerous

@gear_show

2 жыл бұрын

Yes, I'm worry about it too.

How can we learn your art?

Các viên pin có mức điện áp khác nhau. Bạn có nạp pin và cân bằng toàn dãy điện áp của các viên pin đó hay không.

@gear_show

3 жыл бұрын

Tôi không tính phí chúng.

Why don't you connect other pin to the BMS, only B+ and B- are soldered into the board. Quite confusing....

@gear_show

3 жыл бұрын

Yes, I'm concern about this too. I follow the factory instruction.

@E-hab

3 жыл бұрын

He said in the description that the BMS/PCB doesn't have b2 and b3

Прокладки не положил, большая ошибка. Да и платы защиты нет и балансировки. Смысл делать самому если китайцы продают тоже самое, если уж и собирать самому то нормально.

This bms modul is old edition from chinese adaption makita bms modul, and not balance modul, you should use new modul from chinese (new edition) has adapted balance system, have great size from this editon modul, more expensive

What is the model number of the IC in Green PCB board with LEDs?

@gear_show

3 жыл бұрын

It comes with the battery case and PCB.

@amaldev000

3 жыл бұрын

Ok. Any IC name written on that large IC. Curious to know.

The best tool he used is fan 😂

Create Diy circular saw elektrik to cordlees with dinamo Dc 775 please

@gear_show

3 жыл бұрын

Okay, I will thank you!

Have you got a link to this pack

Where you buy the battery cell?

What about 12ah battery, and then, compare it to the milwaukee tool with their 12ah battery

Bottom sticker should say BL1890.

No balancing will seriously shorten the life of the cells.

You need to build a pedal for trigger.

@gear_show

3 жыл бұрын

It has a pedal, but I lost it somewhere.

Sir, I like restoration, but i not have damaged things and I also not have a drill machine , so please give me a old drill machine for restoration thank ❤ you

Can you recharge them with the Makita original loader?

@gear_show

Жыл бұрын

Yes, I can.

Pretty interesting video. Looks like something they use to teach in high school/community college but now in trade school for upcoming trades or DIY repair forums. A neat skill to know.

CE rated? Show me the EEA certification or it didn't happen...

What cost that ) ? Battery and case

21.5V... rest in peace, 4.2v cells...

Code should be BL1890 on bottom

Where do I order this kit from

Not bad, but I think it’s a let down by not installing a balancing PCB to protect the expensive 18650’s

@darkosvk

Жыл бұрын

Hi, in case of installing balancing PCB does original pcb need to be taken off?

Where balance pcb?

Donde. Consigo. La. Erramientas