@@joshauamcdevitt7998 I 100% disagree. I've got like 16 batteries and my god, they fail so often it's actually borderline criminal. I've got two 12ah and two 9ah that all died the first season of use. For the price of those things they should last a bloody decade.
Damn... Nothing even comes remotely close to the knowledge you shared in this video and down in the comments as well. Ain't nothing out there like this. You sir are amazing, seriously thank you!
My 9.0 is losing charge in like 5 min of use. Is this the same issue with yours? I don't have the individual charger tool he has.. I could purchase the balancer I guess but the other tools..
@@alainflores4075 No this is not the same issue I had. My 9.0 would not charge 2 out of the 4 cells (so even after the Milwaukee charger would be done charing and show green lights, I only had 1/2 a full battery charge). Yes, I was able to charge the 2 cells that won't charge on the Milwaukee charger with the individual charger. I spoke too soon as this did not fully solve my issue though. The problem is that now my Milwaukee charger will only charge 3 of the 4 cells (so 1 cell is sitll not charging on the Milwaukee charger). Not sure if its the battery pack itself or if it is the specific cell that is bad or what. Hope this helps. If I get that one non-charging cell issue figured out I will update.
The 9ah are the worst. I purchased 4 x when they came out. I did 5 x different warranty claims in the first 2 years before warranty expired. Now I just indudualy balance charge the cells up every once in a while.
Remember way back in the day when electronics would stop working and you could just throw them against the wall and they'd start working again? I miss thems days.
Have a 12ah that I bought second hand that gives barely any run time. Looks pristine. I'll use my lithium charger to bring up any individual low cells. Then order a 5S balance board for $3.50au to balance over a few days. I have 2 other 12ah I bought used that only charge to 2-3 bars. I'll check cell voltages and spot welds. Thank you for the knowledge.
What's the minimum voltage of such a battery ? Is it 15V, less (given that the samsung cells can be discharged at down to 2.5V/cell) ? When does the cut-off occur for Milwaukee batteries ?
As I know because if different internal resistance this balance wouldn’t last long. Can I build in second balancer permanently inside the case of the battery if there is enough room? I mean is it ok to be connected to the battery pack even when I’m using it?
So many companies do not want to replace or repair electronics or batteries, they just want you to buy more instead. I wonder if the manufacturer/seller even opened the battery for inspection. No one cares to protect their reputation anymore for the quality of their products. If you check, you will find that they employ a quality department but fail to catch the things that plague their batteries the most. Are they really checking their products?
I just repaired a fault in my M18 battery. The point welding were broken mecanically between the two larger metal plates on the top of the battery. Things have shaken a lot from execessive use in a Hackzall...
The symptom varied between no light and one fast blinking LED. Just before the fault the machine stopped after just a minute a couple of times (when things shaked a lot) so it makes sense.
This is a very awsome video with the detailed information , but do you have a link on where to purchase the 2 little balancing boards that you are useing ?
hi there, you mentioned a capitactor balancer a few times in the comments. Could you post a link (aliexpress) to a decent one? also if they sell an all in one unit that would be good for this (power supply, balancer ect) . too many options for a novice like me haha. Thanks
Thanks for posting the useful video. Since I do not have a load balancer I would use connect my lithium cell charger to each individual cell with two jumper wires and charge each one individually. It would take more time but I already have the charger.
@@eddieaguirre2845 It is an XTAR MC1 single lithium cell USB charger that I bought from a vape shop for about $12. It is fully automatic and shuts off completely when the charging is done.
@@eddieaguirre2845 Well, Eddie Aguirre, the procedure in the video should only be used if all of the cell voltages are over 2.5 V. With this type of cell if it drops below that voltage the cell is probably damaged and unsafe to use. If an external power supply is used to raise the voltage enough that it will charge the cell it could vent or explode at any time. Your pack is ready to recycle.
I revived the battery slowly to 19V (3.8V per cell now, just checked but flashing red led) from the two outer pins 21V max i think. But it's flashing the 1st LED red. Is there. a reset for the bms? You should try to leave the small balancer inside the battery otherwise the weak cells will continue to die first and power off earlier then necessary, either that or ditch the weak cells unless you want a tool with short battery life. I would have liked to see your individual battery cell voltages during the discharge around 15.5V. Oh, you did do that, well not too bad on this pack but 2nd from the end was getting a bit lazy.
I respect so much your knowledge!! I have a question I have a 9.0 battery did the testing with my meter battery is really healthy only thing is that it stopped working with my tools it says it's full but when I connect with my tools it doesn't work I have put other batteries 5.0 etc to same tool and tool works what could be wrong with my 9.0?
They're different types. The first one (Active Balancer) is capable of dealing with larger balancing currents, so when the cell voltages a far apart, this gets them into the ballpark of being near each other fairly fast but not with great accuracy; which is where the second one comes in. The second type (Load Balancer) will balance the cells with greater accuracy, but it will take much longer to do this. Hence why he uses the one then two approach. Technically you could just use the second one, but it will take much longer to achieve cell balance than using the one then two approach.
My friend, I have a problem with my 12ha battery, will only charge to 3 to 3 led bars. And has very low run time . Do you think it is the same problem as in this video?
Great video . I’m having an issue if anyone could help . I brought voltages across battery to 3.62 and battery still blinks 1 light . Do I bring them all up to 4v ?
Thanks for the video. I have a question about the load balencer that I hope you can help with. I have successfully balenced a few of my batteries with the active balencer from Ali. Are you able to let me know what the balencer lights indicate? I have noticed that at times I have no lights on completely, just a series of strong sequential flashes over the board. (I don't think its a fault code) This happens for hours at a time and no more balancing occurs. However the same lights flash (as seen in your video when you solder the board on) when there are solid lights which turn on and off periodically and balancing occurs. Thanks
This coil or inactive active balancers are so accurate.. that's why they're not stopping to balance.. try with capacitor balancers, they very accurate!
@@EVCustoms thank you for the reply. What do the lights indicate on these balencers? I assume a solid light means the circuit is active but what about the sequential flashing lights?
Hello, Thank you for this information. I have an M18 HD9.0 battery that only runs for 4 minutes on my 2724-20 blower. The battery is only a couple years old and hasn't lasted long almost from the beginning. I blame the blower because this blower also killed one of my 5.0 batteries. I just charged and then ran this battery. After a full charge I get a green light and all 4 LEDs. The blower stopped at 4.5 minutes. My readings after it stopped were: 18.39 total. 3.75. 3.84. 2.97. 3.93. 3.90. The first LED blinked. Questions: 1. Do you think balancing these will help? 2. Will using only the active balancer do a good enough job? I don't have the current limiting charger you used in the video. 3. The link is to buy the board from China. Delivery is 1 month away. Do you have links that will ship within the USA? Thank you again. I really appreciate your video. I was getting ready to throw this expensive battery away. I am hoping this will fix my battery.
Hello my friend... yes! on No 3 cell you have issue, is almost empty, compare to other cells they are almost at 80% of charge. try to find only one capacitor active balancer 5S, you need just this board to balance the batteries,,,. check for dead cell on No3 parallel batteries, if there no dead cell then after balancing everything will work perfectly !
Thank you. I prefer to buy through eBay if possible. When I look on eBay I see a lot of different sellers in China that have photos of the same looking board as yours. Can you give me a link to the balancer you use from a seller in China on eBay?
Hello, I charged the battery and connected the active balance. After 7 hours the results are: 19.83. 4.11. 4.14. 3.84. 3.86. 3.85. 1-2 and 2-3 cycled through being on bright and off. 3-4 always blinked, very, very dimly. 4-5 never came on or blinked. Did I receive a bad active balancer? Thank you for your help.
You seem very knowledgeable about these M18 batteries. I have a question. I’ve left a m18 Milwaukee high output 6.0AH on a shelf inside my house (around 73 degrees fahrenheit) and haven’t used it at all in 1-1/2 years and it’s been sitting at full charge. Should I be concerned about battery degradation? What would be the best way to test to see?
@@EVCustoms I have no testing equipment or experience besides standard multi meter. I ran the battery down to around 50% charge to continue storage going forward, and battery ran a leaf blower (model number 2724-20) on turbo power for about 10-15 minutes before draining to around 50% That’s the only “test” I’ve done. Not sure how much that information helps, but figured I’d mention it.
Hello. Thank you for your knowledge and videos. I've fixed all my batteries except for one. A 9.0aH milwaukee m18. Would you know what the issue is? Maybe it's the board that's bad? I charged each cell individually and they are very close to the same voltage at around 4.16v . It charges all the way but when I put it on a tool it only lasts about 2-3 minutes then shuts off and doesn't want to charge again. Any idea what it might be?
Could also be a blown fuse link (skinny section of the positive nickel strip.) I had this on one of my 9ah batteries. Or also cracked spot welds where the nickel strip's over lap. Or cracked solder joint where the main connector socket terminals connect.
@@BramBiesiekierski thanks for that info. I'm think you might be right cuz I don't think it'd be a stressed/old battery cuz it wasn't used much when it decided to fail.
Thanks. Same issue and two of the parallel cells were near half volts. I externally charged those two and had same flashing light issue. Was about to scrap battery as a conversion with new BMS but found your methods in this video. I think I can find the balancers in your repair process. Do you have links on them with a nice description of the basic functionality? Also… do you have a theory on why the cells got out of balance? My guess fine dust caused partial failure of the BMS and the cells drifted on charge level. Thorough cleaning of the BMS restored functionality. Do you thinks the on board BMS would have corrected the balancing over a few charge / discharge cycles or is your external method simply faster and better?
Hi.. after balance put your battery on charger to initialise the protection board (reset) -Milwaukee Battery boards didn't have balance mode. -Unbalanced bayteries causes from 1)high discharge rate output by power tools 2) high temperatures use and 3) absence of low voltage protection from the board.
Thanks again. Sounds like a good solution would be to put a permanent balancing socket on the battery pack and use an external balancer… Frequency of external balancing would be based on experience. Your team is a slice of inspiration!
That is a very fine job man👍. When you connect both balancers you follow the order as B1, B2, B3, B4 .....etc??? And those balancers are for 10S max? Thanks
Hi I made up 2 18v lithium battery packs using S5 boards but when I plug them in to my drill and I pull the trigger it tries to go but stops but if I pull very slow it will actually go to full rpm but if I add any load it will stop I used new batteries can you or anyone help me please
Nice video, What did you use for minimum discharge current? I did not see what you typed in om the calculator? Did you use 1C?. Thanks really like your videos.
Hi.. i am calculating max voltage of the battery 5 tmes 4.2V = 21V, so on voltage regulator regulator we must program 21V max voltage and 0.020mA charging current, for the load balancer which can hold 20mA.
Hi... yes is custom made box with 300V 100A watt meter from AliExpress, PWM board with screen XY-PWM1 and 12mosfets IRF3710 in parallel (100Vdss 57A Id)
I have opened my M18 XC5.0 with the blinking fault just like yours, no corrosion or water damage at all, it looks beautiful inside. and found all cells are 3.5V evenly. Is there anything I could try from here? Otherwise, I will just canibalize this charger and turn it into 10 torch batteries.. lol
To check how many capacity left on your ebike battery is, first of all you must balance all your batteries after that must connect some load through watt meter or amp meter and let it until the battarie discharge.
@@EVCustoms I mean you already have a kit to drain the battery and check the capacity. What is that kit and would you be able to recommend any economical device which can drain an ebike battery and we can calculate the battery capacity.
@@EVCustomsI have one with no lightsSo I guess that has lost its program. I did disconnect it and apparently you have to keep voltage on a when changing the batteries. I have about 6 to do
I have a 4.0 that i put in the charger and it goes green, take it out and check the battery indicator and it is one light, put it in a tool will not run, put it back in the charger and it's green? maybe a internal problem
@@EVCustoms Thank you sir for your reply. I looked at the pics from the website link and couldnt find a pic that matched what you used so i just wanted to be sure to get the same thing. Im going to be greedy while i have your ear and also ask about the power supply you also used. Not trying to suck up here but must say all the videos out there me and my comrades are super impressed by you. Thanks again for all your help
@@brianb5779 Ok.... Programmable Power Supply Take cheapest one, is no matter>> www.aliexpress.com/item/32708544695.html?spm=a2g0s.9042311.0.0.27424c4dyaxcie Load Balancer choice>> www.aliexpress.com/item/32950130516.html?spm=a2g0s.9042311.0.0.27424c4d8jHrvP Active Balancer Take 5S, it will be ok for Milwaukee M18>> www.aliexpress.com/item/33002903687.html?spm=a2g0s.9042311.0.0.27424c4dHEDy0b
Capacity was calculated by: Wh (found after putting battery under load until its depleted) DIVIDED by Wh (watt hour of battery per spec) How do we know battery spec? Voltage x amps. So M18 with 5 Amps is 18 volts TIMES 5 amps. 90 Watt So his 74,78 Wh DIVIDED by 90 W is 0,83 which is 83 procent. Neat. Please correct me about watt/hour thingy.
Best video on UA-cam...refreshing to watch someone who knows what their doing....laughing at all the other idiots jump starting knackered batteries on UA-cam 👍👍👍...
My battery is completely dead .. 0 volts..... Will not charge on Milwaukees charger only flashes red and green and I can't seem to jump it as the wires and batteries cells will warm up but still won't charge on charger... please help me
With such expensive battery packs, why doesn't Milwaukee incorporate load-balancing circuitry into their battery circuit board in the first place??? I have had 2 batteries do this. I didn't know how to fix it, so I was basically out $150 worth of batteries. :-(
This is just my opinion, but the M18 BMS does balancing and it does work most of the time. I recently checked a bunch of my M18 batteries (1.5, 2.0, 5.0, 6.0 HO, total of 8) and their cells were within 0.01 V, which is really good considering the packs are several years old (2-3 years old) and were heavily used for a long time (I was a carpenter in Alberta, Canada, using the tools in temperatures ranging from -30 to +30). However if they do happen to get out of balance too much (whatever the underlying reason), the BMS somehow does not count with this scenario and it only gets worse from thereon. I did have a 9.0 HD battery that was acting funky and it turned out it was a similar scenario - cell #1 charged to about 60 %, cell #2 about 75 %, and the rest 100%. I would not even notice it from using the battery itself, until one day I did realize it took only an hour to fully charge the 9 Ah battery, which realistically on the OEM charger (3 A) should take roughly 3 hours. Only then I did took it apart, manually charged the first two cells and it seems to work normally now. Also worth noting is that the 9 Ah batteries are notoriously known for their unreliability (their rating on Home Depot is terrible), I wonder if it's always the case of them simply going out of balance.
I also once bought the M18 High Impact wrench (the first generation) with 4.0 batteries which are not even made anymore, and they must have been at least 6+ years old and HEAVILY used (the tool came from the Calgary's Fire Department). Even them being old, they still charged and worked well for a 4 Ah battery. Unfortunately I have not took them apart and measured them, just tried they can go through a full cycle in a M18 FUEL Skilsaw and then sold them.
hi im filipino i have power tools melwuakee my battery not charging always blinking red and green what is the problem of my battery can you pls advice how recovery this battery thank you...
This is very impressive. However, if one does not possess the technical equipment and knowledge shown in this video, it is not a cost effective solution to the problem. Just buy a new battery. Milwaukee provides a five-year warranty on their batteries. Beyond that, you are probably better off with a new unit anyway.
This is meant to teach you the skills, why throw away a perfectly good battery, the equipment needed is less than 1/4th the cost of one new battery. look around the house at just how many rechargeable battery items the average homeowner has. it's not just Milwaukee batteries, Dewalt, Bosch etc.
All you do is jump start battery with fully charge battery. Two wires, pos. to pos. and neg. to neg. to out side leads, just few minutes. Problem solved!
@@EVCustoms My dear friend, I got the second equivalent card because its image is clear in the video, and the method succeeded, thanks to you... May I get a clear picture of the first card? Sorry for the poor translation from Arabic via Google
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Awesome 👌, thank you, sir.
This will help me a lot, I love milwaukee tools, but their batteries are awful.
Have a blessed day 🙏
actually they have fantastic batteries
@@joshauamcdevitt7998 I 100% disagree. I've got like 16 batteries and my god, they fail so often it's actually borderline criminal. I've got two 12ah and two 9ah that all died the first season of use. For the price of those things they should last a bloody decade.
Damn... Nothing even comes remotely close to the knowledge you shared in this video and down in the comments as well. Ain't nothing out there like this. You sir are amazing, seriously thank you!
Thank you mate..
Thank you so so so much! This worked perfectly and my HD9.0 will charge completely again. I appreciate you sharing your knowledge!
Thank you my friend... my pleasure!
My 9.0 is losing charge in like 5 min of use. Is this the same issue with yours? I don't have the individual charger tool he has.. I could purchase the balancer I guess but the other tools..
@@alainflores4075 No this is not the same issue I had. My 9.0 would not charge 2 out of the 4 cells (so even after the Milwaukee charger would be done charing and show green lights, I only had 1/2 a full battery charge). Yes, I was able to charge the 2 cells that won't charge on the Milwaukee charger with the individual charger. I spoke too soon as this did not fully solve my issue though. The problem is that now my Milwaukee charger will only charge 3 of the 4 cells (so 1 cell is sitll not charging on the Milwaukee charger). Not sure if its the battery pack itself or if it is the specific cell that is bad or what. Hope this helps. If I get that one non-charging cell issue figured out I will update.
The 9ah are the worst. I purchased 4 x when they came out. I did 5 x different warranty claims in the first 2 years before warranty expired. Now I just indudualy balance charge the cells up every once in a while.
@Bram Biesiekierski two of my 9.0 are junk as well after maybe 20 charges total.
I didn't even realize this was possible. Thank you for the upload, I definitely learned something new and interesting today.
Great video quick question how do you test the chip or board in the packs?
Remember way back in the day when electronics would stop working and you could just throw them against the wall and they'd start working again? I miss thems days.
Where this disbalance getting from? Charger? Or cells itself?
After long working time period, heavy loads and most usually is from deep discharge of batteries, don't discharge them below than 3.4Volts (per cell)
Have a 12ah that I bought second hand that gives barely any run time. Looks pristine. I'll use my lithium charger to bring up any individual low cells.
Then order a 5S balance board for $3.50au to balance over a few days.
I have 2 other 12ah I bought used that only charge to 2-3 bars. I'll check cell voltages and spot welds.
Thank you for the knowledge.
Best balancers is with capacitors, they have amazing accuracy...
Any recommendations or links to good balancers that I could get in the US?
Thanks for making the video, helped me with fixing some batteries I have
best balance boards and what is that charger with the fan on top? i went to links in description and it seems you cant get your exact balance boards?
I'm here for the background music!
What's the minimum voltage of such a battery ?
Is it 15V, less (given that the samsung cells can be discharged at down to 2.5V/cell) ?
When does the cut-off occur for Milwaukee batteries ?
As I know because if different internal resistance this balance wouldn’t last long.
Can I build in second balancer permanently inside the case of the battery if there is enough room?
I mean is it ok to be connected to the battery pack even when I’m using it?
Yes if you have space there, try with capacitor balance... they have perfect accuracy!
@@EVCustoms thanks 🙏,
Which one is capacitor balance? Could you please put the link for me ?
Brilliant.i have a 12ah to sort outwhich is showing 15v , so hopefully i will use your advise, 🤞👍
So many companies do not want to replace or repair electronics or batteries, they just want you to buy more instead. I wonder if the manufacturer/seller even opened the battery for inspection. No one cares to protect their reputation anymore for the quality of their products. If you check, you will find that they employ a quality department but fail to catch the things that plague their batteries the most. Are they really checking their products?
Can you tell me please what's solder you use as it sticks very easily I find it very hard to get the solder to stick to the contacts
I just repaired a fault in my M18 battery. The point welding were broken mecanically between the two larger metal plates on the top of the battery. Things have shaken a lot from execessive use in a Hackzall...
The symptom varied between no light and one fast blinking LED. Just before the fault the machine stopped after just a minute a couple of times (when things shaked a lot) so it makes sense.
This is a very awsome video with the detailed information , but do you have a link on where to purchase the 2 little balancing boards that you are useing ?
hi there, you mentioned a capitactor balancer a few times in the comments. Could you post a link (aliexpress) to a decent one? also if they sell an all in one unit that would be good for this (power supply, balancer ect) . too many options for a novice like me haha. Thanks
Thanks for posting the useful video. Since I do not have a load balancer I would use connect my lithium cell charger to each individual cell with two jumper wires and charge each one individually. It would take more time but I already have the charger.
What charger did you use?
@@eddieaguirre2845 It is an XTAR MC1 single lithium cell USB charger that I bought from a vape shop for about $12. It is fully automatic and shuts off completely when the charging is done.
@@SuperMurrayb and did it work?
I have a milwaukee 5.0 and only the first series shows 2.5 and the other 4 series show 0.
@@eddieaguirre2845 Well, Eddie Aguirre, the procedure in the video should only be used if all of the cell voltages are over 2.5 V. With this type of cell if it drops below that voltage the cell is probably damaged and unsafe to use. If an external power supply is used to raise the voltage enough that it will charge the cell it could vent or explode at any time. Your pack is ready to recycle.
@@SuperMurrayb hi, did you get your tool working with this kind of charging, each cell?
I revived the battery slowly to 19V (3.8V per cell now, just checked but flashing red led) from the two outer pins 21V max i think. But it's flashing the 1st LED red. Is there. a reset for the bms? You should try to leave the small balancer inside the battery otherwise the weak cells will continue to die first and power off earlier then necessary, either that or ditch the weak cells unless you want a tool with short battery life. I would have liked to see your individual battery cell voltages during the discharge around 15.5V. Oh, you did do that, well not too bad on this pack but 2nd from the end was getting a bit lazy.
hello
can i leave the balancer attached inside the battery back?
I respect so much your knowledge!!
I have a question I have a 9.0 battery did the testing with my meter battery is really healthy only thing is that it stopped working with my tools it says it's full but when I connect with my tools it doesn't work I have put other batteries 5.0 etc to same tool and tool works what could be wrong with my 9.0?
Thank you mate! have you open this battery? check your tabs..
to fix battery we have to use both balancers.?? or can we just use 2nd one?
They're different types. The first one (Active Balancer) is capable of dealing with larger balancing currents, so when the cell voltages a far apart, this gets them into the ballpark of being near each other fairly fast but not with great accuracy; which is where the second one comes in. The second type (Load Balancer) will balance the cells with greater accuracy, but it will take much longer to do this. Hence why he uses the one then two approach.
Technically you could just use the second one, but it will take much longer to achieve cell balance than using the one then two approach.
Where did your active load with the fan come from?
Why did the charger balance the cells the second time( last time) and not the first time you charged it?
My friend, I have a problem with my 12ha battery, will only charge to 3 to 3 led bars. And has very low run time . Do you think it is the same problem as in this video?
Thanks for sharing! Now I can fix my batteries
Can we plug the 2 balancers at the same time on the battery please ?
Great video . I’m having an issue if anyone could help . I brought voltages across battery to 3.62 and battery still blinks 1 light . Do I bring them all up to 4v ?
how did you calculate th e capacity percent of the battery? how did you get the 82%? Regard
New battery have 5Ah this battery after test have 4,14Ah
So actual capacity is 82,8%
Thanks for the video. I have a question about the load balencer that I hope you can help with. I have successfully balenced a few of my batteries with the active balencer from Ali. Are you able to let me know what the balencer lights indicate? I have noticed that at times I have no lights on completely, just a series of strong sequential flashes over the board. (I don't think its a fault code) This happens for hours at a time and no more balancing occurs. However the same lights flash (as seen in your video when you solder the board on) when there are solid lights which turn on and off periodically and balancing occurs. Thanks
This coil or inactive active balancers are so accurate.. that's why they're not stopping to balance.. try with capacitor balancers, they very accurate!
@@EVCustoms thank you for the reply. What do the lights indicate on these balencers? I assume a solid light means the circuit is active but what about the sequential flashing lights?
Hello, Thank you for this information. I have an M18 HD9.0 battery that only runs for 4 minutes on my 2724-20 blower. The battery is only a couple years old and hasn't lasted long almost from the beginning. I blame the blower because this blower also killed one of my 5.0 batteries.
I just charged and then ran this battery. After a full charge I get a green light and all 4 LEDs. The blower stopped at 4.5 minutes. My readings after it stopped were: 18.39 total. 3.75. 3.84. 2.97. 3.93. 3.90. The first LED blinked.
Questions:
1. Do you think balancing these will help?
2. Will using only the active balancer do a good enough job? I don't have the current limiting charger you used in the video.
3. The link is to buy the board from China. Delivery is 1 month away. Do you have links that will ship within the USA?
Thank you again. I really appreciate your video. I was getting ready to throw this expensive battery away. I am hoping this will fix my battery.
Hello my friend... yes! on No 3 cell you have issue, is almost empty, compare to other cells they are almost at 80% of charge. try to find only one capacitor active balancer 5S, you need just this board to balance the batteries,,,. check for dead cell on No3 parallel batteries, if there no dead cell then after balancing everything will work perfectly !
Thank you. I prefer to buy through eBay if possible. When I look on eBay I see a lot of different sellers in China that have photos of the same looking board as yours. Can you give me a link to the balancer you use from a seller in China on eBay?
Hello, I charged the battery and connected the active balance. After 7 hours the results are: 19.83. 4.11. 4.14. 3.84. 3.86. 3.85. 1-2 and 2-3 cycled through being on bright and off. 3-4 always blinked, very, very dimly. 4-5 never came on or blinked. Did I receive a bad active balancer? Thank you for your help.
You seem very knowledgeable about these M18 batteries. I have a question. I’ve left a m18 Milwaukee high output 6.0AH on a shelf inside my house (around 73 degrees fahrenheit) and haven’t used it at all in 1-1/2 years and it’s been sitting at full charge. Should I be concerned about battery degradation? What would be the best way to test to see?
Hi man.. most probably the battery will be ok.. about capacity test you will need load-capacity tester board, have any testing board something?
@@EVCustoms I have no testing equipment or experience besides standard multi meter. I ran the battery down to around 50% charge to continue storage going forward, and battery ran a leaf blower (model number 2724-20) on turbo power for about 10-15 minutes before draining to around 50% That’s the only “test” I’ve done. Not sure how much that information helps, but figured I’d mention it.
excellent video on how to properly charge and equalize lithium cells.
Thank you man.. ;)
Hello. Thank you for your knowledge and videos. I've fixed all my batteries except for one. A 9.0aH milwaukee m18. Would you know what the issue is? Maybe it's the board that's bad? I charged each cell individually and they are very close to the same voltage at around 4.16v . It charges all the way but when I put it on a tool it only lasts about 2-3 minutes then shuts off and doesn't want to charge again. Any idea what it might be?
Yes... too stressed or old battery.
@@EVCustoms does that mean I should just toss it?.. or would it be worth it to get new cells and replace them?
Yes.. recycle the old batteries and change them with new, Samsung 25R or Q30 batteries recommend
Could also be a blown fuse link (skinny section of the positive nickel strip.) I had this on one of my 9ah batteries.
Or also cracked spot welds where the nickel strip's over lap.
Or cracked solder joint where the main connector socket terminals connect.
@@BramBiesiekierski thanks for that info. I'm think you might be right cuz I don't think it'd be a stressed/old battery cuz it wasn't used much when it decided to fail.
if you dont have a load balancer can you use phone charger and charge them one by one...
Hi... yes you can do that but! you need high accuracy charger ..
this info is gold. thanks for this great content
This battery need a special wrench to disassemble. What size is it?
Torx screws T10 and T8 I think
Thanks. Same issue and two of the parallel cells were near half volts. I externally charged those two and had same flashing light issue. Was about to scrap battery as a conversion with new BMS but found your methods in this video. I think I can find the balancers in your repair process. Do you have links on them with a nice description of the basic functionality? Also… do you have a theory on why the cells got out of balance? My guess fine dust caused partial failure of the BMS and the cells drifted on charge level. Thorough cleaning of the BMS restored functionality. Do you thinks the on board BMS would have corrected the balancing over a few charge / discharge cycles or is your external method simply faster and better?
Hi.. after balance put your battery on charger to initialise the protection board (reset)
-Milwaukee Battery boards didn't have balance mode.
-Unbalanced bayteries causes from 1)high discharge rate output by power tools 2) high temperatures use and 3) absence of low voltage protection from the board.
Thanks again. Sounds like a good solution would be to put a permanent balancing socket on the battery pack and use an external balancer… Frequency of external balancing would be based on experience. Your team is a slice of inspiration!
@Popajaja Yes is absolutely just like that, unfortunately..
And now for that job how much will you charge customer ?
I charge him 30euros.... its ok for this job? ;)
@@EVCustoms Not bad! Much cheaper than (half the cost of) replacing the battery!
@@EVCustoms can u send mine in I’m in Canada I’m having the same problum and I don’t wanna buy a new battery
That is a very fine job man👍.
When you connect both balancers you follow the order as B1, B2, B3, B4 .....etc???
And those balancers are for 10S max?
Thanks
Hi.. if you mean load balancer is 8s each, so you can make from 2s to 20s if you want..
Thanks for the video. Still waiting for smart e bike system 😅
me too man.. ;) this project need time..
Hi I made up 2 18v lithium battery packs using S5 boards but when I plug them in to my drill and I pull the trigger it tries to go but stops but if I pull very slow it will actually go to full rpm but if I add any load it will stop I used new batteries can you or anyone help me please
Nice video, What did you use for minimum discharge current? I did not see what you typed in om the calculator? Did you use 1C?. Thanks really like your videos.
Hi.. i am calculating max voltage of the battery 5 tmes 4.2V = 21V, so on voltage regulator regulator we must program 21V max voltage and 0.020mA charging current, for the load balancer which can hold 20mA.
@@EVCustoms Thanks for the info
What device are you using for watt-hour capacity measurement? (that board with the LCD and fan) Is this custom or something off-the-shelf?
Hi... yes is custom made box with 300V 100A watt meter from AliExpress, PWM board with screen XY-PWM1 and 12mosfets IRF3710 in parallel (100Vdss 57A Id)
@@EVCustoms Thank you for your interest my dear friend
I have opened my M18 XC5.0 with the blinking fault just like yours, no corrosion or water damage at all, it looks beautiful inside. and found all cells are 3.5V evenly. Is there anything I could try from here? Otherwise, I will just canibalize this charger and turn it into 10 torch batteries.. lol
Hi.. your strip's is ok? welded properly?
@@EVCustoms it seems to be, it's hard to tell what it looks like under the circuit board though
Where can i get to purchase those balancers
Nice work, this is some of the small things that saves our planet.
What do you charge for this repair?
Can you advise battery capacity evaluater for ebike batteries. 36v 13ah
Hi.. what you mean?
@@EVCustoms how to check current capacity left in an old ebike battery.
To check how many capacity left on your ebike battery is, first of all you must balance all your batteries after that must connect some load through watt meter or amp meter and let it until the battarie discharge.
@@EVCustoms I mean you already have a kit to drain the battery and check the capacity. What is that kit and would you be able to recommend any economical device which can drain an ebike battery and we can calculate the battery capacity.
Nice idea... i will make one video with my load and meter kit..
Where can i buy the first balncer you used ?
Hi.. you can find it on descriptions (active balancer)
Do you happen to have any idea what the alarm codes actually mean?
Unfortunately there didn't exist any manual or list with error codes for Milwaukee batteries..
@@EVCustomsI have one with no lightsSo I guess that has lost its program. I did disconnect it and apparently you have to keep voltage on a when changing the batteries. I have about 6 to do
@Allister Denyer No need keep voltages on the board when you change the batteries.. i have do that many times..
Where are u located, and do u repair Milwaukee batterys 1.5 m18
I want maintenance methods for my Hilti 36 and 20, please
What causes a lithium battery to lose balance?
1) Cheap Batteries 2) defective batteries in packs..
I really enjoyed this video great info thanks!!
Thank you mate!
I have a 4.0 that i put in the charger and it goes green, take it out and check the battery indicator and it is one light, put it in a tool will not run, put it back in the charger and it's green? maybe a internal problem
Yes most probably tou must open it..
The labels for that battery is different in the USA. Wonder why!!!???
cause is from EU or other contra than USA. I bought a still saw from UK... the 5.0A batteries looks just like the ones here...
I am making a mini bench saw that runs off M18 batteries, does anyone know the pinout and how over-temp is detected and at what temp?
Underneath there is a temp sensor. Just add a heat shield of some sort.
Thank You For this video.. Awesome job
Going to buy everything you used but which load balancer? Im not seeing exactly what you are using. BTW excellent info, thank you very much.
The load balancer are the last little PCB boards which i use in the video.. this boards is to achieve high accuracy voltage between batteries...
@@EVCustoms Thank you sir for your reply. I looked at the pics from the website link and couldnt find a pic that matched what you used so i just wanted to be sure to get the same thing. Im going to be greedy while i have your ear and also ask about the power supply you also used. Not trying to suck up here but must say all the videos out there me and my comrades are super impressed by you. Thanks again for all your help
@@brianb5779
Ok....
Programmable Power Supply
Take cheapest one, is no matter>>
www.aliexpress.com/item/32708544695.html?spm=a2g0s.9042311.0.0.27424c4dyaxcie
Load Balancer
choice>>
www.aliexpress.com/item/32950130516.html?spm=a2g0s.9042311.0.0.27424c4d8jHrvP
Active Balancer
Take 5S, it will be ok for Milwaukee M18>>
www.aliexpress.com/item/33002903687.html?spm=a2g0s.9042311.0.0.27424c4dHEDy0b
@@EVCustoms Sooo much appreciated Sir, thank you and i wish you the best and continuing to learn from you. Take care
great job and video!
Capacity was calculated by: Wh (found after putting battery under load until its depleted) DIVIDED by Wh (watt hour of battery per spec)
How do we know battery spec? Voltage x amps. So M18 with 5 Amps is 18 volts TIMES 5 amps. 90 Watt
So his 74,78 Wh DIVIDED by 90 W is 0,83 which is 83 procent. Neat. Please correct me about watt/hour thingy.
Excellent video I learned a lot thanks so much!
Best video on UA-cam...refreshing to watch someone who knows what their doing....laughing at all the other idiots jump starting knackered batteries on UA-cam 👍👍👍...
;) Thank you my friend..
So do U repair others peoples bc mine is doing the same and my brain hurts just watching this I don’t really want to attempt it myself
My battery is completely dead .. 0 volts..... Will not charge on Milwaukees charger only flashes red and green and I can't seem to jump it as the wires and batteries cells will warm up but still won't charge on charger... please help me
With such expensive battery packs, why doesn't Milwaukee incorporate load-balancing circuitry into their battery circuit board in the first place??? I have had 2 batteries do this. I didn't know how to fix it, so I was basically out $150 worth of batteries. :-(
This is just my opinion, but the M18 BMS does balancing and it does work most of the time.
I recently checked a bunch of my M18 batteries (1.5, 2.0, 5.0, 6.0 HO, total of 8) and their cells were within 0.01 V, which is really good considering the packs are several years old (2-3 years old) and were heavily used for a long time (I was a carpenter in Alberta, Canada, using the tools in temperatures ranging from -30 to +30). However if they do happen to get out of balance too much (whatever the underlying reason), the BMS somehow does not count with this scenario and it only gets worse from thereon.
I did have a 9.0 HD battery that was acting funky and it turned out it was a similar scenario - cell #1 charged to about 60 %, cell #2 about 75 %, and the rest 100%. I would not even notice it from using the battery itself, until one day I did realize it took only an hour to fully charge the 9 Ah battery, which realistically on the OEM charger (3 A) should take roughly 3 hours. Only then I did took it apart, manually charged the first two cells and it seems to work normally now. Also worth noting is that the 9 Ah batteries are notoriously known for their unreliability (their rating on Home Depot is terrible), I wonder if it's always the case of them simply going out of balance.
I also once bought the M18 High Impact wrench (the first generation) with 4.0 batteries which are not even made anymore, and they must have been at least 6+ years old and HEAVILY used (the tool came from the Calgary's Fire Department). Even them being old, they still charged and worked well for a 4 Ah battery. Unfortunately I have not took them apart and measured them, just tried they can go through a full cycle in a M18 FUEL Skilsaw and then sold them.
hi im filipino i have power tools melwuakee my battery not charging always blinking red and green what is the problem of my battery can you pls advice how recovery this battery thank you...
Have had several M18 issues with batteries and one charger. Fed up
Oh note to everyone. Be GENTLE when I first doing this. I broke off 3 LEDS. because I was too hard on the toothbrush
This is very impressive. However, if one does not possess the technical equipment and knowledge shown in this video, it is not a cost effective solution to the problem. Just buy a new battery. Milwaukee provides a five-year warranty on their batteries. Beyond that, you are probably better off with a new unit anyway.
This is meant to teach you the skills, why throw away a perfectly good battery, the equipment needed is less than 1/4th the cost of one new battery. look around the house at just how many rechargeable battery items the average homeowner has. it's not just Milwaukee batteries, Dewalt, Bosch etc.
I have a M18 red lithium xc not charging
Cool intro :)
I have balanced mine it it will not come out of alarm mode.
Can’t watch this video without the close caption on it!!
I meant to say active balancer, i apologize
I enjoyed the video but the music is annoying
Sorry about that..
All you do is jump start battery with fully charge battery. Two wires, pos. to pos. and neg. to neg. to out side leads, just few minutes. Problem solved!
No.. this will work but damage both batteries. Proper way is stated in this video, been fixing batteries for years
You are very good at repairing and explaining but why the music ?
If we wanted to listen to music we wouldnt be here
I am apologize...
make video use 12 ah battery
I have a battery that needs repair I’m in the state’s
wish i could solder that good must be a good iron
This is a copy battery.
Great video awful music
Hi mate, can i send you email thanks
Thank you very much, for this video, you have solved many problems
You welcome my friend..
@@EVCustoms My dear friend, I got the second equivalent card because its image is clear in the video, and the method succeeded, thanks to you... May I get a clear picture of the first card? Sorry for the poor translation from Arabic via Google