This battery reconditioning program exceeded my presumptions. It worked on any drill battery, several AA and AAA batteries batery.repair and any camera battery. The steps are simple and the act itself is exciting to do. No matter what type of battery you`ve got, it is sure to function again!
You are one of the few who have shown how to test each cell, soldered the batteries back in place and shown when the circuit protection board need replacement as well. Many thanks for a very well explained video and the links for parts.
This is a great video on this repair.I've done about 10 of these battery's now in the last year and a half. Alot of them seem to fail again. Ether the replaced cells go out or they create the next weakest set and those will go out. I put them all in balanced when I do them. Its to bad the replacement (board chip pcb) doesn't balance all the cells on each charge. If one set drops a little lower it boosts the others up. Eventually when it gets to low it will cause the replacement board to fault (flashing lights). But on the bright side you can change the bad low week cells again or separately charge them and it will start working again. It Doesn't lock you out. I think the best way to charge the mixed matched used cells would be to use a balance charger to keep them equally charged. Sometimes the battery's show its fully charged on Makita charger but is still weak when being used with a tool.I have taken it apart again and one set of cells is weaker. The Boards i have been using were from different supplier look the same but the temp sensor is longer. Sorry for the long post.
I have read somewhere there are non-original Chargers which look like Makita chargers, some of them should charge batteries which are cut-off from the battery management system. With these you can leave the good balancing board in the battery and replace the broken cells, and charge the battery with the original board and the non-original charger.
I have a working Makita battery which the yellow tab on the circuit protect board has broken off. Would I be able to buy a new circuit board and just swap the whole piece out?
Yep. Top quality info. I've done a few of these rebuilds and that was all good info. I didn't realise that replacement boards are now available. I've just been changing them to a dumb charge+balance setu pusing the existing connector so I can use an RC charger instead of the makita ones with the deeply unhelpful software lockout.
Thank you for the valuable information. Good thing I checked before recycling two of mine that just went bad after 6 years. I think these are the same cells I use in a vape. Now I have two paths I could take :-) Great video, well done and thank you again for your time and efforts.
Does anyone know what the two small holes (with metal inside) on the Makita power source terminal are? I understand the two metal contacts (+, -) but I don't understand the two tiny metal contacts. My 5.0amp 18v battery doesn't have any visible contact ports that match. Maybe that weird little white box/white wire on the left at 4:40 has something to do with it? Is there any wireless connectivity going on? I ask this because the power source terminals from Japan and the U.S. have a very slight difference. If those extra metal pin holes are inactive, it seems like the US battery should work with a Japanese terminal.
If your Mikita balance board doesn't like the charger it could be over voltage (Mikita only charges the cells to 4.0v) or it could have tripped the failed try counter. There are several versions of the Mikita battery balance board on eBay, you installed the old circuit board that only removes the battery from the load when the #1 cell gets lower than 3.2v, on a new pack that previously had cell balancing. I took apart 8 packs and made 5 working packs. I've got some new design balance boards on order for my older (junk pile) pack that now has a failed board and some mismatched laptop cells.
Given that the Makita balance board will not let you replace cells and the replacement chinese boards do not monitor individual cells so cannot balance the battery, I feel the only viable way forward is to connect to individual cells with one of the connectors used in the R/C world and then use something like an Imax B6 to re-charge and maintain balance on the battery.
Did you manage to do this? I also have the same thought and considered drilling a hole in the casing and running a balance connector through to connect to the individual cells
There is a Chinese company called LLC electronics, they offer a set to make a Makita LXT battery, you get a case, the cell holder, prefabricated nickel strips and a PCB with balancing. With this there's no need to use a 3rd party charger for balancing, it is done by the Makita charger automatically.
Is it not possible to reset the original protection circuit board? perhaps if the voltage was completely disconnected from it for a while, so it cleared the memory?
Because I am not technically minded, I missed the exact detail why the original circuit was replaced - ie what was it that the original circuit refused to do?
Good video all round. I do wonder if you could have checked the internal resistance of the two "good" replacement cells. One of the cells in the final test had higher than average internal resistance (and thus had lower voltage) and it may be that one of the batteries you installed. Testing the donor batteries before they get soldered in is doing due diligence. I learned a lot from your instructions and I thank you for time and effort, much appreciated.
Can you buy these cells to rebuild a old pack and what about the stupid chip? Is their a way to reset the chip to 0? Will replacing the board make a battery with bad cells chargeable?
Great video.... Question: Could the charger you linked to be used to charge 12V motorcycle and car lead acid and also could it be used to charge a motorcycle Li-Ion battery with more than six cells (no idea how many cells they have) ?? Thank you
Did you realised that cirquit boards have different contacts. Looks like one battery is with star, second without. Middle connector at one have two contacts, and second battery Middle connector only one contact. My impact driver does not work with battery with two contacts. Work only if battery fitted not fully. So battery will start charging after this, but tool may stay without battery if it need two contacts instead of one
I just soldered the circuit boards from Bangood onto my repaired packs and the charger lights up red like it is charging for about 5 seconds, then flashes green a few times and then red and green like the battery is broken. Why are these circuit boards not allowing the pack to charge? Thanks for you help.
It's difficult to get 3rd party Makita PCBs with balancing, but they are offered from a Chinese company. I resurrected a battery with broken PCB with it, it has no low voltage protection, but it has balancing and works with the original charger.
Do you know if i can use one of those pcb to convert a nicad drill to li ion? Only by changing the conection of the pcb to drill is a craftsman 15,6v and i want to change to li ion but charging with same charger
That's great. Some protection circuits automatically disable themselves if they ever detect the voltage on any cell dropping below some set value. This has been an issue with replacing the cells in tired old laptop batteries. You had to connect a voltage source before disconnecting the old cells. Supposedly there is a way to reset the protection circuit, but manufacturers only provide the procedure to professional battery restoration shops.
I tried this with an old Packard Bell laptop battery. The circuit had switched off, and usually, once the circuit disables itself, there is no way of re-enabling it. And no, I'm not getting a Chinese battery from ebay. My old laptops whose batteries are kaput, are being used on mains only.
You have to watch out because there are similar Makita batteries which have charging cycles logger. I heard that there is a easy way to bypass the counter or reset them but I forgot how to do it...that's why I run my Makita battery pack with an Amazon BMS and XT60 connector in the drill and battery
The replacement circuit board is not compatible with balance circuit? So this means that to charge properly, you can only do with a separate balance connections and universal smart charger? Is there a replacement circuit that is compatible with makita charger and balancer???
Круто, наконец кто-то разобрал ориг аккум макита. Есть вопрос: какого номтнала на плате стоит пред? Ведь он там есть? Спасибо! Честно говоря, от увиденного усилилась вера в комплекты с алика)) они практически ничем не отличаются, всё, что нужно- либо аккуратно припаять, либо замутить приемлимого функционала точечную сварку. У меня, правда, с первого раза не получилось, я, похоже купил банки не очень высокотоковые... Собрал в корпусе на 5 банок реальную ёмкость 3400-3600, шурики крутят на ура, а перф крутит 3-4 секунды и отрубается, не хватает тяги. Сейчас думаю попробовать собрать на шоколадках HG2, чуть меньше ёмкость, но они отдают хороший ток. Кстати, на плате с алика пред 15А, и по поводу этого есть сомнения будет ли достаточно его для работы, например болгарки...?
Hey, Does anyone know a source for the yellow connector on the batteries? Those POS are NOT suited for placement in a rough-and-tumble toolbag. They break easy. I need to replace them to fix my batteries. Thanks
hello! Very good video about reparing makita batteries! thancks a lot! I started to fix one of my batteries also but i have a little probleme. I soldered the new Protection board like you and also a Balance wire 5S for balanced the batteries for 1 time. It is very strange because my charger see only 4 groups of cells when i try to balance them and i have cheched the connection and everything is ok. Do you know from your experience where could be the problem? Thanck a lot for your answer!!
@@jmyyer I think it's the 14.4v wire. In fact those pcb are not good because it's not balancing cells. It's should have 6 wires (0v, 3.6v, 7.2v, 10.8v, 14.4v and 18.5) but it have just 3 (0v,14.4v and 18.5v). It's meant this charger it's dangerous
Great video but Im a busy contractor I dont have time for these repairs. My question is why do so many of mine fail? Its at the point where Im considering switching brands. My tools are not abused. (aside from one battery that happened to fall into a hot-tub.)
@@dylanc9275 so dont forget to charge them if not using but dont fully charge them and leave them either. Makita batteries are a joke I had 2 batteries die because I packed my drill away, 1 was practically unused.
I used to fully drain them before changing them out. Was told by Makita rep the battery would last much longer if you change them out when you first notice power loss.
Hello. Please, That yellow connector on the battery is what? What is it used for? Can the battery be charged only by connecting to + pole and pole -? Thank you, Bob
The yellow connector communicates with the Makita charger. The original charger regulates the charging current, dependent on the battery temperature and other data. Normally the battery could also get charged over the 2 main connectors, with low current and a special charger.
so.. question, those replacement board dont connect to every singel cell, how is the pack balanced?????? that's whats keeping me from buying those boards and im very suspicious about their capabilities
In the Makita packs, you are correct. These batteries are not balanced and are simply charged in series. Makita relies on the high quality of li-ion batteries, which generally do discharge very evenly over a long period of time, unlike li-po batteries, which always need balance charging.
I see, thanks. so after some reading in different forums and watching some newer makita packs being disassambled, i'm quite sure now that the newest generation has leads going to every single cell now and presumably are being balanced. the pcbs inside nowadays look very different and much more complex. so that's a good trend i would say. regardless of how good the cells might be
Yes, earlier 18V packs and all the 14V packs (well all the ones I've seen, which is about 17 so far) do not have balance connections. Which is pretty shoddy given how much trouble they went to put electronics into the packs to detect 'bad' states and lock you out when using their own-brand chargers. They could at least have balanced the cells (which would have stopped some packs getting into a 'bad' (i.e. too unbalanced) state.
Hey, thanks for posting this. I had the red/green flashing lights and replaced the board as you did. All seemed ok at the first, but in the Makita charger it only charges for around 20 seconds before the green LED starts flashing and charging strops. If I remove the battery or unplug the power and plug it back in, it again charges 20 seconds before flashing green LED. Any idea what may be causing this and how to fix it?
I've read some of the non-original chargers which look like Makita chargers can charge batteries even if the battery management system in the pack has switched it off.
thanks a lot for video. im also interested in this batteries, and have done some repairs, but i only used imax charger. im suprised that there is the circuit available on market to make complete repair (original charging with original charger). I noticed that with your imax you are charging cells as LiPO. I think that these cells are LiIon and should be charged with Imax with LiIon setting. Also I think that max voltage for them is 4.1V and not 4.2V as shown in video, correct me if Im wrong.
Good video. But I dont use Sony 18650. They are too hot when power load and make battery stop working by heat sensor. Samsung, Panasonic, Sanyo are better.
I am having trouble duplicating your instructions. The iMax B6AC V2 keeps saying "balance connect error" and will not proceed. I put it on a good battery and the same result. Can you help?
I have Turnigy charger. It is similar to ImaxB6. Balancing error coming aswell. I know from experience, that if you want to charge more then one cell, charger wants you charging it properly and only by using additional balancing connector. Probably your imax have same software
HomeMade ch. my turnigy charger says the same thing, I can’t charge without balance lead connected. Did you find a solution. Maybe older firmware in video!
No, I contacted seller, described, what i expect from charger, he did not know if this is faulty charger, but offered to send replacement. I accepted. Replacement works exactly same. So now I have two chargers for price of one. And I think this for batteries protection, not to charge without balancing, as lithium batteries get damaged if overcharge.
Companies normally dont want you repairing things, increase in profit margin to say nope non repairable. When realistically its the cells that fail why not make a pack that has easily replaceable cells such as somthing like a AA battery toy where you pop off a side panel and swap the bad cell with a new one. Still have to buy the specific 18650 either high or low discharge based off the amp hours of the pack. (Low amp hour packs the cheap ones that normally come with the drill in the first place normally use high discharge (about 15 amps per cell with maybe 5 or 6 cells, low life expectancy given the output) A 4 amp hour pack might have 12 cells and draws maybe 5 amps per cell which is akin to ypur laptop batteries, overall higher capacity but low discharge but when you stack 12 together you get the same amperage as the smaller high discharge packs.) Larger pack might be 3 times the cost of a amall one but its technically 6 times better as the individual packs of cells will balance charge (3 sets of 4 for example) they dont have to output so much power (5 amps over maybe 1t amps) so they will have a higher capacity, and given the lower individual cell output the battery itself will last longer without crapping put
Each cell has only 4.2 volts when fully charged, so it's not a dangerous voltage. This is an advantage of cordless tools - if you use it in rainy weather (professionals have to do this sometimes) you can't get a electric shock. With 115 or 230 volt tools (depends where you live) you can get one if they get wet.
6 років тому
rất hay , nhưng có cách nào reset cái mạch cũ lại được không bạn
If you have to buy new cells it's the same price if you buy a new battery. For a cordless drill you need cells which can provide high amps, most usual cells can't do this. 10 good Sony Konion (they can provide this high amps) costs the same like a new BL 1860 battery, and the 5 AH BL 1850 is even cheaper. With a Makita battery you don't have the risk to get fake cells, and you have warranty on the battery.
Doing this is actually quite dangerous. Following this process actually bypasses the inbuilt safety protection. Battery manufacturers know very well what these batteries are capable of when modified and thus users can't reset these boards. I've seen what one of these "repaired" batteries can do in a vehicle. Lets say there was not much of the vehicle left. This happened underground, and those of you who have worked in UG mining know what a vehicle fire means in that environment. Oh, and you can forget trying to claim insurance on damage caused by tampered batteries.
Nice job very clean repairs! I was wondering if you have ever thought of tackling the project of taking the shell of a Makita battery and putting the required electronic converters in it to power of Makita tools with a cord? There is a product for sale made by Green Lee electrical tools. It was made to power one of their crimpers for large cables I believe. It is made with a Makita drill as a base platform the batteries capacity must not have been sufficient for their demands of their tool so they have made such a product to support of their tools needs! I could just buy one, but I think that it would be a fun project and I would hope a guy could do it for much cheaper than the $285 USD That they are asking for them! I am quite vested in the Makita 18v and 18v X2 tools. It might be due to my poor searching skills on the internet as well of lack of knowledge in electronic components but so far I have had of no luck finding of what they could be using that would fit on the inside of the battery shell. If you think that there is value in such a project I’d love to see a video of your quality of such a project or possibly feed back as to what they may be using to convert the 110 power to the 18v tools most efficiently in such a small space! Thanks if you do and I look forward to more batterie videos again, nice job! I think your videos are easy to understand and will help many diy’ers complete their own repairs! Cheers, Rod
You did it wrong and unsafe. Nickel strip welders are not expensive 15-25$ and most of them come with some nickel strip in the box. Soldering this type of battery is bad idea on positive side there is plastic insulation ring and pressure valve if you melt it you simply short this battery and burn your house down or release toxic gas from that battery. Also if you didn't wash flux it will leave behind corrosive residues. That is why even cheap chinese brands use nickel welders and not soldering them.
Each pair is conected + to + and -to- so you still have 3.7 volts from each pair only if you connect +to - and -to + then you get 7.4 volts (parallel or serie)
You linked to a fake iMax B6 charger. Someone asked if they have the holographic authenticity sticker and the supplier said no. That means they are fake.
1. if you replaced all the 18650 cells with NEW of the exact same type it would probably have charged on the Makita base ... no need to replace the BMS 2. better to spot weld
I suggest you create and sell an adapter that can plug the battery operated tool into electricity when the battery is finished and market it world wide so you can become millionaire
Finally someone using brain and charge it with balancing. There is tons of videos showing people using those fake dangerous bms boards + old cells with different voltages and using it with oryginal charger. They shouldnt make videos if they dont know what they are doing, because that thing can burn someones house.
Clean both surfaces (battery ends, plates, wires) very thoroughly by scraping or disc and use a very hot soldering gun and good solder. Don't overheat the batteries as you could damage them and be very careful handling the tools to avoid shorting the battery terminals.
Hi ! Because... You used the tools , for doing driving jobs , and let's the driver 's cooling down 's ! Will be long 's workable battery's life 's !!!( heat will killed life's of battery
This battery reconditioning program exceeded my presumptions. It worked on any drill battery, several AA and AAA batteries batery.repair and any camera battery. The steps are simple and the act itself is exciting to do. No matter what type of battery you`ve got, it is sure to function again!
No, it won't work on lithiums
You are one of the few who have shown how to test each cell, soldered the batteries back in place and shown when the circuit protection board need replacement as well. Many thanks for a very well explained video and the links for parts.
This is a great video on this repair.I've done about 10 of these battery's now in the last year and a half. Alot of them seem to fail again. Ether the replaced cells go out or they create the next weakest set and those will go out. I put them all in balanced when I do them. Its to bad the replacement (board chip pcb) doesn't balance all the cells on each charge. If one set drops a little lower it boosts the others up. Eventually when it gets to low it will cause the replacement board to fault (flashing lights). But on the bright side you can change the bad low week cells again or separately charge them and it will start working again. It Doesn't lock you out. I think the best way to charge the mixed matched used cells would be to use a balance charger to keep them equally charged. Sometimes the battery's show its fully charged on Makita charger but is still weak when being used with a tool.I have taken it apart again and one set of cells is weaker. The Boards i have been using were from different supplier look the same but the temp sensor is longer. Sorry for the long post.
Check out this website if you want to learn the easiest method to recondition your batteries: JoxCharge. com
The rule is you must replace all batteries with new one
I have read somewhere there are non-original Chargers which look like Makita chargers, some of them should charge batteries which are cut-off from the battery management system. With these you can leave the good balancing board in the battery and replace the broken cells, and charge the battery with the original board and the non-original charger.
FYI to remove Makita Bl1830 battery screws use a Torx T10 security bit (it has a hole in torx bit center).
Exactly what I was looking for in the comments! Thank you, Gabriel :)
Thanks!!!!!
You've been very helpful. I spent tonnes of time looking for the tool to remove these screws !!!! God bless you, fella.
I have a working Makita battery which the yellow tab on the circuit protect board has broken off. Would I be able to buy a new circuit board and just swap the whole piece out?
One of the best and knowledgeable videos on 18650 li-ion battery repairs
Yep. Top quality info. I've done a few of these rebuilds and that was all good info. I didn't realise that replacement boards are now available. I've just been changing them to a dumb charge+balance setu pusing the existing connector so I can use an RC charger instead of the makita ones with the deeply unhelpful software lockout.
Check out this website if you want to learn the easiest method to recondition your batteries: JoxCharge. com
Thank you for the valuable information. Good thing I checked before recycling two of mine that just went bad after 6 years. I think these are the same cells I use in a vape. Now I have two paths I could take :-) Great video, well done and thank you again for your time and efforts.
Does anyone know what the two small holes (with metal inside) on the Makita power source terminal are? I understand the two metal contacts (+, -) but I don't understand the two tiny metal contacts. My 5.0amp 18v battery doesn't have any visible contact ports that match. Maybe that weird little white box/white wire on the left at 4:40 has something to do with it? Is there any wireless connectivity going on? I ask this because the power source terminals from Japan and the U.S. have a very slight difference. If those extra metal pin holes are inactive, it seems like the US battery should work with a Japanese terminal.
Are those sony vtc3?
What tx10 security driver is that?
If your Mikita balance board doesn't like the charger it could be over voltage (Mikita only charges the cells to 4.0v) or it could have tripped the failed try counter.
There are several versions of the Mikita battery balance board on eBay, you installed the old circuit board that only removes the battery from the load when the #1 cell gets lower than 3.2v, on a new pack that previously had cell balancing. I took apart 8 packs and made 5 working packs.
I've got some new design balance boards on order for my older (junk pile) pack that now has a failed board and some mismatched laptop cells.
Given that the Makita balance board will not let you replace cells and the replacement chinese boards do not monitor individual cells so cannot balance the battery, I feel the only viable way forward is to connect to individual cells with one of the connectors used in the R/C world and then use something like an Imax B6 to re-charge and maintain balance on the battery.
Did you manage to do this? I also have the same thought and considered drilling a hole in the casing and running a balance connector through to connect to the individual cells
Can someone tell me for what Is the yelow part for on the board?
I m wrong or when you soldering the new circuit is not the case of battery the same?
The balancing wire cannot be connected to the yellow terminal on the battery?
What type of screwdriver did you use?? It is not a phllip driver screw on mine? can I buy that from somewhere?
There is a Chinese company called LLC electronics, they offer a set to make a Makita LXT battery, you get a case, the cell holder, prefabricated nickel strips and a PCB with balancing. With this there's no need to use a 3rd party charger for balancing, it is done by the Makita charger automatically.
Is it not possible to reset the original protection circuit board? perhaps if the voltage was completely disconnected from it for a while, so it cleared the memory?
After a lot of different reports it's not possible, maybe it would be possible for Makita but not for normal persons.
If the protection circuit is inside the battery pack , then why the need for that yellow connector which has 7 lines which plug into the charger?
Hello there. Can we operate the Makita ddf482 model cordless drill directly with dc 18-20 v without battery?
These 2 batteries are original?
If you replaced all the batteries without putting a new board on do you think it would have worked?
Just did this mod to a water damaged battery, works perfectly!
Because I am not technically minded, I missed the exact detail why the original circuit was replaced - ie what was it that the original circuit refused to do?
Good video all round. I do wonder if you could have checked the internal resistance of the two "good" replacement cells. One of the cells in the final test had higher than average internal resistance (and thus had lower voltage) and it may be that one of the batteries you installed. Testing the donor batteries before they get soldered in is doing due diligence. I learned a lot from your instructions and I thank you for time and effort, much appreciated.
whats the solder wire you use
Can you buy these cells to rebuild a old pack and what about the stupid chip? Is their a way to reset the chip to 0? Will replacing the board make a battery with bad cells chargeable?
How do you open the battery BL1815 18v
Great video....
Question: Could the charger you linked to be used to charge 12V motorcycle and car lead acid and also could it be used to charge a motorcycle Li-Ion battery with more than six cells (no idea how many cells they have) ??
Thank you
Did you realised that cirquit boards have different contacts. Looks like one battery is with star, second without. Middle connector at one have two contacts, and second battery Middle connector only one contact. My impact driver does not work with battery with two contacts. Work only if battery fitted not fully. So battery will start charging after this, but tool may stay without battery if it need two contacts instead of one
I just soldered the circuit boards from Bangood onto my repaired packs and the charger lights up red like it is charging for about 5 seconds, then flashes green a few times and then red and green like the battery is broken. Why are these circuit boards not allowing the pack to charge? Thanks for you help.
I changed out the board and the battery drains continously what could case this
4:46 Looks like the replacement Battery Protection circuit has no balance? That is annoying.
It's difficult to get 3rd party Makita PCBs with balancing, but they are offered from a Chinese company. I resurrected a battery with broken PCB with it, it has no low voltage protection, but it has balancing and works with the original charger.
Do you know if i can use one of those pcb to convert a nicad drill to li ion? Only by changing the conection of the pcb to drill is a craftsman 15,6v and i want to change to li ion but charging with same charger
I've charged each pair of cells after replacement, and the makita charger accepted the battery with old circuit again ! :)
That's great. Some protection circuits automatically disable themselves if they ever detect the voltage on any cell dropping below some set value. This has been an issue with replacing the cells in tired old laptop batteries. You had to connect a voltage source before disconnecting the old cells. Supposedly there is a way to reset the protection circuit, but manufacturers only provide the procedure to professional battery restoration shops.
Markle2k
hey boy.
what way to reset makita board when charger does't recognize
I tried this with an old Packard Bell laptop battery. The circuit had switched off, and usually, once the circuit disables itself, there is no way of re-enabling it. And no, I'm not getting a Chinese battery from ebay.
My old laptops whose batteries are kaput, are being used on mains only.
You have to watch out because there are similar Makita batteries which have charging cycles logger. I heard that there is a easy way to bypass the counter or reset them but I forgot how to do it...that's why I run my Makita battery pack with an Amazon BMS and XT60 connector in the drill and battery
The replacement circuit board is not compatible with balance circuit?
So this means that to charge properly, you can only do with a separate balance connections and universal smart charger?
Is there a replacement circuit that is compatible with makita charger and balancer???
I have some non-working batteries, now I know what to do with them. Thanks for the video. Where to buy such an lcd digital multimeter?
Круто, наконец кто-то разобрал ориг аккум макита. Есть вопрос: какого номтнала на плате стоит пред? Ведь он там есть? Спасибо! Честно говоря, от увиденного усилилась вера в комплекты с алика)) они практически ничем не отличаются, всё, что нужно- либо аккуратно припаять, либо замутить приемлимого функционала точечную сварку. У меня, правда, с первого раза не получилось, я, похоже купил банки не очень высокотоковые... Собрал в корпусе на 5 банок реальную ёмкость 3400-3600, шурики крутят на ура, а перф крутит 3-4 секунды и отрубается, не хватает тяги. Сейчас думаю попробовать собрать на шоколадках HG2, чуть меньше ёмкость, но они отдают хороший ток. Кстати, на плате с алика пред 15А, и по поводу этого есть сомнения будет ли достаточно его для работы, например болгарки...?
Hey, Does anyone know a source for the yellow connector on the batteries? Those POS are NOT suited for placement in a rough-and-tumble toolbag. They break easy. I need to replace them to fix my batteries. Thanks
hello!
Very good video about reparing makita batteries! thancks a lot!
I started to fix one of my batteries also but i have a little probleme. I soldered the new Protection board like you and also a Balance wire 5S for balanced the batteries for 1 time. It is very strange because my charger see only 4 groups of cells when i try to balance them and i have cheched the connection and everything is ok. Do you know from your experience where could be the problem?
Thanck a lot for your answer!!
Can I buy two BL1813G batteries you made? This is south korea
3:23 Hi Well Done Tips. Why do you use LiPo Charge Instead of LiIon?
Its the same. LiIon charging characteristic is exactly the same to a LiPo char.
what function is little red wire on board
I am wondering the same, have you found out the use of this little red wire ?
@@jmyyer I think it's the 14.4v wire. In fact those pcb are not good because it's not balancing cells. It's should have 6 wires (0v, 3.6v, 7.2v, 10.8v, 14.4v and 18.5) but it have just 3 (0v,14.4v and 18.5v). It's meant this charger it's dangerous
Can you write the size of the batteries you use, the voltage and the mah?
18650 - 3.7V - 1500mAh (1,5Ah)
Awesome video, thanks for sharing. Can you tell me what supply voltage you are using for the imax please?
Great video but Im a busy contractor I dont have time for these repairs. My question is why do so many of mine fail? Its at the point where Im considering switching brands. My tools are not abused. (aside from one battery that happened to fall into a hot-tub.)
dont leave your battery fully charged
@@dylanc9275 so dont forget to charge them if not using but dont fully charge them and leave them either. Makita batteries are a joke I had 2 batteries die because I packed my drill away, 1 was practically unused.
I used to fully drain them before changing them out. Was told by Makita rep the battery would last much longer if you change them out when you first notice power loss.
Hello.
Please,
That yellow connector on the battery is what?
What is it used for?
Can the battery be charged only by connecting to + pole and pole -?
Thank you, Bob
The yellow connector communicates with the Makita charger. The original charger regulates the charging current, dependent on the battery temperature and other data.
Normally the battery could also get charged over the 2 main connectors, with low current and a special charger.
Good video U make it look so simple!
awesome video man. Any idea where one could look for broken used batteries?
What screwdriver bit is required to take the battery apart?
Allen wrench with a hole in the center you can get it at harborfreigtools for about 6 dlls
Torx 10 with security it has a hole on center you can get it at harborfreigtools for about 6 dlls is a matalic green looking tool pack
Torx wrench
so.. question, those replacement board dont connect to every singel cell, how is the pack balanced?????? that's whats keeping me from buying those boards and im very suspicious about their capabilities
In the Makita packs, you are correct. These batteries are not balanced and are simply charged in series. Makita relies on the high quality of li-ion batteries, which generally do discharge very evenly over a long period of time, unlike li-po batteries, which always need balance charging.
I see, thanks. so after some reading in different forums and watching some newer makita packs being disassambled, i'm quite sure now that the newest generation has leads going to every single cell now and presumably are being balanced. the pcbs inside nowadays look very different and much more complex. so that's a good trend i would say. regardless of how good the cells might be
Yes, earlier 18V packs and all the 14V packs (well all the ones I've seen, which is about 17 so far) do not have balance connections. Which is pretty shoddy given how much trouble they went to put electronics into the packs to detect 'bad' states and lock you out when using their own-brand chargers. They could at least have balanced the cells (which would have stopped some packs getting into a 'bad' (i.e. too unbalanced) state.
Hey, thanks for posting this. I had the red/green flashing lights and replaced the board as you did. All seemed ok at the first, but in the Makita charger it only charges for around 20 seconds before the green LED starts flashing and charging strops. If I remove the battery or unplug the power and plug it back in, it again charges 20 seconds before flashing green LED.
Any idea what may be causing this and how to fix it?
I've read some of the non-original chargers which look like Makita chargers can charge batteries even if the battery management system in the pack has switched it off.
I think what you are seeing is voltage differences between the cells, and therefore the circuit sees its as a problem..
Which watt of soldering you are using?What trick to solder it 18650 battery?
Akhtar Husain its best to uses high watt soldering tool to melt the solder quickly and not heat up the battery I use like a 80watt or higher
thanks a lot for video. im also interested in this batteries, and have done some repairs, but i only used imax charger. im suprised that there is the circuit available on market to make complete repair (original charging with original charger).
I noticed that with your imax you are charging cells as LiPO. I think that these cells are LiIon and should be charged with Imax with LiIon setting. Also I think that max voltage for them is 4.1V and not 4.2V as shown in video, correct me if Im wrong.
Hi pliz ryobi hardwire reparing burshless drill
Good video. But I dont use Sony 18650. They are too hot when power load and make battery stop working by heat sensor. Samsung, Panasonic, Sanyo are better.
I am having trouble duplicating your instructions. The iMax B6AC V2 keeps saying "balance connect error" and will not proceed. I put it on a good battery and the same result. Can you help?
I have Turnigy charger. It is similar to ImaxB6. Balancing error coming aswell. I know from experience, that if you want to charge more then one cell, charger wants you charging it properly and only by using additional balancing connector. Probably your imax have same software
HomeMade ch. my turnigy charger says the same thing, I can’t charge without balance lead connected. Did you find a solution. Maybe older firmware in video!
No, I contacted seller, described, what i expect from charger, he did not know if this is faulty charger, but offered to send replacement. I accepted. Replacement works exactly same. So now I have two chargers for price of one. And I think this for batteries protection, not to charge without balancing, as lithium batteries get damaged if overcharge.
Excellent advice... really good source for fixing my dead bosch cells... thanks a lot!!!
Saya tidak mengerti masalah batere, mau tanya apakah batere makita 1860 bisa dipakai ke masin yg baterenya makita 1830 ?
Companies normally dont want you repairing things, increase in profit margin to say nope non repairable. When realistically its the cells that fail why not make a pack that has easily replaceable cells such as somthing like a AA battery toy where you pop off a side panel and swap the bad cell with a new one. Still have to buy the specific 18650 either high or low discharge based off the amp hours of the pack.
(Low amp hour packs the cheap ones that normally come with the drill in the first place normally use high discharge (about 15 amps per cell with maybe 5 or 6 cells, low life expectancy given the output)
A 4 amp hour pack might have 12 cells and draws maybe 5 amps per cell which is akin to ypur laptop batteries, overall higher capacity but low discharge but when you stack 12 together you get the same amperage as the smaller high discharge packs.)
Larger pack might be 3 times the cost of a amall one but its technically 6 times better as the individual packs of cells will balance charge (3 sets of 4 for example) they dont have to output so much power (5 amps over maybe 1t amps) so they will have a higher capacity, and given the lower individual cell output the battery itself will last longer without crapping put
do you ever use these batts ?
Great video. Thanks for taking the time to walk us through.
i've always wondered. is there any risk of getting a electrick shock from the batteries when doing this operation (unless you purposely short it)
Each cell has only 4.2 volts when fully charged, so it's not a dangerous voltage.
This is an advantage of cordless tools - if you use it in rainy weather (professionals have to do this sometimes) you can't get a electric shock. With 115 or 230 volt tools (depends where you live) you can get one if they get wet.
rất hay , nhưng có cách nào reset cái mạch cũ lại được không bạn
after replacing two cell , how much voltage battery is ?.if you charge . does battery recognize original charger?or having to charge in balance
i have one 3.0mAh battery fully working. how should i proceed in order to make it a 4 or 6.0mah?
If you have to buy new cells it's the same price if you buy a new battery. For a cordless drill you need cells which can provide high amps, most usual cells can't do this. 10 good Sony Konion (they can provide this high amps) costs the same like a new BL 1860 battery, and the 5 AH BL 1850 is even cheaper. With a Makita battery you don't have the risk to get fake cells, and you have warranty on the battery.
Thank you if only l'd have the gear and time ,good vid mate ,and nice work , Cheers.
Please try using flux for soldering lithium battery
Doing this is actually quite dangerous. Following this process actually bypasses the inbuilt safety protection. Battery manufacturers know very well what these batteries are capable of when modified and thus users can't reset these boards. I've seen what one of these "repaired" batteries can do in a vehicle. Lets say there was not much of the vehicle left. This happened underground, and those of you who have worked in UG mining know what a vehicle fire means in that environment. Oh, and you can forget trying to claim insurance on damage caused by tampered batteries.
Nice job very clean repairs! I was wondering if you have ever thought of tackling the project of taking the shell of a Makita battery and putting the required electronic converters in it to power of Makita tools with a cord? There is a product for sale made by Green Lee electrical tools. It was made to power one of their crimpers for large cables I believe. It is made with a Makita drill as a base platform the batteries capacity must not have been sufficient for their demands of their tool so they have made such a product to support of their tools needs! I could just buy one, but I think that it would be a fun project and I would hope a guy could do it for much cheaper than the $285 USD That they are asking for them! I am quite vested in the Makita 18v and 18v X2 tools. It might be due to my poor searching skills on the internet as well of lack of knowledge in electronic components but so far I have had of no luck finding of what they could be using that would fit on the inside of the battery shell. If you think that there is value in such a project I’d love to see a video of your quality of such a project or possibly feed back as to what they may be using to convert the 110 power to the 18v tools most efficiently in such a small space! Thanks if you do and I look forward to more batterie videos again, nice job! I think your videos are easy to understand and will help many diy’ers complete their own repairs!
Cheers,
Rod
Please don't solder onto Li-Ion - use a spot welder.
You did it wrong and unsafe. Nickel strip welders are not expensive 15-25$ and most of them come with some nickel strip in the box. Soldering this type of battery is bad idea on positive side there is plastic insulation ring and pressure valve if you melt it you simply short this battery and burn your house down or release toxic gas from that battery. Also if you didn't wash flux it will leave behind corrosive residues. That is why even cheap chinese brands use nickel welders and not soldering them.
Did 10 x 3.7v = 37v?? How its labelled by 18v??
5 х 3.7v doubled cells
Parallel pairs :)
Each pair is conected + to + and -to- so you still have 3.7 volts from each pair only if you connect +to - and -to + then you get 7.4 volts (parallel or serie)
Спасибо друг, выручил !👍
You linked to a fake iMax B6 charger.
Someone asked if they have the holographic authenticity sticker and the supplier said no.
That means they are fake.
Worlds smallest yet most powerful soldering iron.
I have the smaller type just won't charge
1. if you replaced all the 18650 cells with NEW of the exact same type it would probably have charged on the Makita base ... no need to replace the BMS 2. better to spot weld
These circuit boards are discontinued.
I suggest you create and sell an adapter that can plug the battery operated tool into electricity when the battery is finished and market it world wide so you can become millionaire
the top of that battery looks like the inside of my pants when i visit a slaughterhouse
Thank you. Liked and subscribed.
Have done this on a 14v battery about a year ago. The original makita charger only charged it twice and then it died again. New is best.
Finally someone using brain and charge it with balancing. There is tons of videos showing people using those fake dangerous bms boards + old cells with different voltages and using it with oryginal charger. They shouldnt make videos if they dont know what they are doing, because that thing can burn someones house.
What's the secret to getting the contacts soldered together again? I tried it once and they wouldn't stick.
jospi2 use solder with Flux in it, it makes the metals stick together with solder
sandpaper
Clean both surfaces (battery ends, plates, wires) very thoroughly by scraping or disc and use a very hot soldering gun and good solder. Don't overheat the batteries as you could damage them and be very careful handling the tools to avoid shorting the battery terminals.
Start your very own battery business and make huge money here: JoxCharge.com
thanks now i know whats inside the battery pack, just 10pcs of 18650 batteries.
Not some cheap ones, these are high drain cells
Didn’t show how you take cover off.
just replace with new ones why put two old ones in there place which have been it the power pack for years
Never solder a cell! You have to spot weld! And we never change one or two, only all of them at once!!!
Good job.
维修以刀取电池，手受伤会感染発炎，因为电池液漏出而若沾染在刀器上而割伤手，易感染。
Thanks....
Aaaaanddddd -- the batteries you soldered to are now damaged from excessive heat!
Never use that, use a K weld spot welder..
i built mine with new vtc6, feel free to watch
Hi ! Because... You used the tools , for doing driving jobs , and let's the driver 's cooling down 's ! Will be long 's workable battery's life 's !!!( heat will killed life's of battery
As the chances of getting a hard short using a metal knife you should tear up on safty
Good job thank you
are you madonna? "а я милого узнаю по походке..." - ты хоть описание составил бы на родном, великом и могучем...
Good video