Milwaukee M18 Battery one flashing light won't charge

Рет қаралды 35,679

8 ай бұрын

This Milwaukee M18 18v 5ah battery won't charge or power a tool and is showing only 13v on the multimeter. So I took it apart and found one bank of cells to be defective I replaced the offending cells and still it wouldn't work even though the voltage was within the chargeable range I ended up replacing the pcb board with a knock off one from ebay this got the battery working and charging again.
If you are interested in the items used to repair the battery links are below
Milwaukee M12 Soldering iron
UK amzn.to/3UcOsdy
USA amzn.to/3MmXJxx
Venlab Digital Multimeter
UK amzn.to/3KDi805
USA amzn.to/3MlEep8
Spot Welder
UK amzn.to/3mfPXLi
USA amzn.to/3nOlCEa
Milliontronic Security bit set
UK amzn.to/3Kj7N87
USA amzn.to/3UdIRnk
disclaimer
battery repair is a risky undertaking and careful consideration should be taken before attempting it
it is not the intention of Doctor Lefthandthread media for any injury to occur as a result of my videos
this video is for entertainment and educational purposes only

Пікірлер: 46

@clinteastwood8222 19 күн бұрын

Thxs for the video very informative. Is this issue with cells normally a Milwaukee issue?

@doctorlefthandthread 19 күн бұрын

Lithium battery packs are all prone to this regardless of the brand

@silviu89ket 4 ай бұрын

The Spot Welder that you let it on description is not the same like in your video.can you tell me your model please?😊

@doctorlefthandthread 4 ай бұрын

I bought that one some time ago the one in the link is the closest I can see

@yousefalmarhoon8789 8 ай бұрын

Great demonstration for the batteries fix as always, unfortunately I have the same problem with my 12.ah battery it flashes like this, ~& I charged the battery manually up to 4.07V in each pack inside but it still flashes and refuse to work, did you face same problem or not?

@doctorlefthandthread 8 ай бұрын

When that happens I replace the board but I haven't been able to source boards for the larger batteries yet 8ah and 12ah

@TikkaHorse 8 ай бұрын

I've had this happen often, and so for (other than one with 3 dead cells) I've been able to solve the issue by unplugging the charger with the battery on it, wait until the light stops flashing (sometimes take a few moments), then plugging the charger back in. Leave the battery on the charger the whole time, make sure it's fully seated, and you have to wait for the light to turn off after unplugging with the battery fully seated. I found this out by chance, and with all but one Christmas light display, this has solved the failure to start charging problem.

@doctorlefthandthread 8 ай бұрын

@@TikkaHorse that's awesome thanks for the tip

@elocurrente6419 28 күн бұрын

The problem is not the battery, the problem is the battery charger.

@eives44 20 күн бұрын

Not always true there is a reason those cells dropped so low it could be the health of the cells struggling to hold the charge hence why they discharged lower than the others meaning yes its still the batteries as I've had packs I've used slow charger on the build them back and they still discharge faster than the other cells and you get a similar issue every time

@joannak7904 7 ай бұрын

hI Very helpful video, please tell me where I can buy such a battery cell welder, or what is it called, what model?

@doctorlefthandthread 7 ай бұрын

Here is a similar one Spot Welder UK amzn.to/3mfPXLi USA amzn.to/3nOlCEa

@joannak7904 7 ай бұрын

Thank you very much. Regards Jan

@maddawglodbrock1380 4 ай бұрын

Do you have a link for who you buy yours pcb boards from on eBay mine was supposed to come from London and came from china poorly packed thank in advance 👍

@doctorlefthandthread 4 ай бұрын

I get them from ebay and they are from China www.ebay.co.uk/itm/235248414701?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=ujlvx--aqj2&sssrc=4429486&ssuid=cjPn_ZfdQLW&var=&widget_ver=artemis&media=COPY

@maddawglodbrock1380 4 ай бұрын

Thanks will give it a go👍

@doctorlefthandthread 4 ай бұрын

@@maddawglodbrock1380 good luck

@maddawglodbrock1380 4 ай бұрын

I have a battery it has 4 v at each cell and 18 v at the terminals it won’t charge o mr run a drill it will light up a torch do you think it will be the pcb board ?

@doctorlefthandthread 4 ай бұрын

Yes but try this first kzfaq.info/get/bejne/mLllh6WHxtWcmKM.html

@maddawglodbrock1380 4 ай бұрын

Thank s tried that it didn’t work will change the pcb. The only thing I didn’t mention is that none of the lights on the battery light up 👍

@maddawglodbrock1380 4 ай бұрын

Still waiting for my new circuit board but I bought another battery today it’s full of water I’m drying it out I’m getting no voltage no light what’s your thoughts is it possible to revive it? Thanks

@doctorlefthandthread 4 ай бұрын

@@maddawglodbrock1380 in my opinion no the water damage always seems to fry the board I did manage to revive the cells in a makita but had to get a new board fitted

@maddawglodbrock1380 4 ай бұрын

Thanks I’ve just stuck another test on the one I’ve a pcb for i was getting 18 v and 4v at each cell now I’m getting 16 v at the terminals and nothing on the cell what would have caused that to change thanks

@lukedavison11 6 ай бұрын

Northern Irish man myself can I post you my 12amp battery to get the same repair

@doctorlefthandthread 6 ай бұрын

Email me drlefthandthread@gmail.com

@excdalmt7807 3 ай бұрын

What if the light stays green and battery is not charged

@doctorlefthandthread 3 ай бұрын

Could be broken connection bad cells faulty pcb cell imbalance you wouldn't know without opening the battery pack

@excdalmt7807 3 ай бұрын

@doctorlefthandthread its crazy though i have 4) M12 6.0 batteries blink red and green and those are brand new and have 3) M18 12.0 and 1) M18 9.0 that stay green and dont charge and these are almost brand new

@doctorlefthandthread 3 ай бұрын

@@excdalmt7807 did you check the voltage of the battery and the cell individual bank voltage?

@tznutz4824 6 ай бұрын

Brah milwaukee never made a battery with that number 5 font style. Better return this ebay counterfeit and get a real milwaukee buddy.

@doctorlefthandthread 6 ай бұрын

I think that battery is genuine I could be wrong but counterfeits are usually worse build quality

@chrissetter 6 ай бұрын

Look up European M18 batteries. They all have that font. I was also confused the first time seeing an M18 battery not sold in America.

@iliketakingshowers 6 ай бұрын

What a clown. These are UK batteries you nub

@mg02772 5 ай бұрын

Website for aftermarket PCBs you are happy with? Thanks in advance 👍

@doctorlefthandthread 5 ай бұрын

@@mg02772 ebay I buy the little blue boards they do the job

@maddawglodbrock1380 4 ай бұрын

I connected my new pcb the charger does not even flash at all like nothing is connected when I put a jump to it the bbattery terminals they will light up soon I disconnect them there no light any ideas? Thanks

@doctorlefthandthread 4 ай бұрын

Have you tried it on the charger? Are there broken connections? What voltage is coming out of the top?

@maddawglodbrock1380 4 ай бұрын

It’s. Not recognised by the charger and doesn’t flash the charger what so ever. Think it could be a faulty pcb as ther is no continuity between the second from left terminal and second from right

@doctorlefthandthread 4 ай бұрын

@@maddawglodbrock1380 has to be faulty