Milwaukee is too expensive to be having all this crap going on

glad to see i am not the only one having problems with 12 volt stuff this is shit it cost to much to be having battery problems

After reading the threads below, I left the battery in, unplugged, and plugged it back in. It works. No more Red, Green, Red, Green.

Old post I know but this may help some people, the batteries they use in the 6.0 and the red lithium cp3.0 packs use the same pink cells, they seem to be unstable or they weren't balanced when assembled, so when the milwaukee charger charges it does so in a series circuit which doesn't allow the cells to get balanced while charging, I often have to use the USB charging trick with USB device that tells me at what amps volts im putting in and how how long and it will show me how many mAh I'm putting into the cell just to get it to the same voltage as the other cells

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I had a charge do this to every battery I put it, many of the were brand new. Leaving the battery in, unplugging the charger, waiting for the lights to shut off (aka capacitors to drain out) and plugging back in worked for me.

First recharge on a recently purchased multi tool, and I have the same problem. Did not keep my receipt, so I guess I am SOL trying to return it. Does NOT make me a raving Milwaukee fan. :( Addendum: I tried the trick of unplugging the battery cable as I was trying to charge the battery. In other words, I left the battery in the charger, unplugged it, and plugged it back in again. Worked like a charm.

All I did was unplug it (while having the battery in) and plug it back in and it worked

Had the same thing goin on with a 6.0 in my 6 pack rapid charger, it wouldnt brick it but any battery i put in while the defective battery was flashing would either say all charged or all dead, regardless of actual battery status. Ive always said milwaukee or die but... its shit like this that makes dewalt and makita guys have some ground to stand on

bought 4 XC 6.0 M12 batteries. Within three months two of the batteries would not charge. sent them to Milwaukee and they gave me two new batteries. three months later the other two batteries would not charge.... Going to send back. For the $120+ tax each that I paid for the batteries you'd think they'd be good quality. My 3.0 batteries which I bought back in 2012 are still going strong ironically.

I wanted to add something that may be helpful to some. My charger charges my 6.0 battery for about 15 seconds, then throws a flashing light. This particular symptom usually means one or more cells are overdischarged. Why would they be? Could be a number of things. Can it be fixed? Yes, all you need to do is run a voltage between 3.4 and 4.2v through the leads of the bad pack until the pack reads at least 3.4v. A "pack" refers to one group of cells in parallel. Once you have the groups above 3.4v reassemble them and the charger will begin to charge them normally. A crude way of doing this is with a chopped USB cord coming out of a power brick. USB runs on 5v and will also charge the packs, just be careful nothing gets hot. NOTE: if this fixed your battery, but the pack(s) overdischarged because they are old/worn cells, do not discharge the battery as much when using it, so it doesn't brick your battery again.

Keep trying it till it starts charging. Does that to me when they run too low and it has no charge. So charger thinks battery is bad. Or jump it with another M12 battery for like 3-5mins and then put on charger. Should work. 😎👍🏻👍🏻

had the same issue but a couple comments mention the “T” terminal on the battery being slightly recessed vs the other terminals. i bent the terminal out a little and my once bricked chargers are good as new and operational again

Power cycle the charger … ie : leave the battery in and unplug it … worked for me … I have to do the same thing on my “ Smart TV”

Unplug your charger & try your charged (good) batteries again. It should reset your charger back to normal by unplugging it

Milwaukee M12-18C. I found the cause of the failure (when connected without a battery to 12V it lights up green and red alternately) the MOSFET AP9565BGH in the 12V socket had a short circuit and the temperature damaged the PCB (it rose with the copper foil) I desoldered it and now the 18V socket works without problems -

New chargers and batteries have a protective coating. Clean with alcohol then slam the battery in and out of the charger a couple times.

Take to a service center and they will give you a new one within 3 years some of the early than 2021 made with bad Samsung 30Q cells after somewhere mid 2021 ish they change the Murata aka Sony cells

Happened to me also, when that happens unplug the charger for a few minutes, then plug it it back in and the charger should work again. I’m trying to figure out how to fix the battery cause the jump starting my battery won’t t work, still won’t charge after 🤷🏻‍♂️

I have found that if I have this problem I can charge them in my m12 USB charger and after that they work fine.

I have two new 6.0 batteries m12 and I put them on cordless vaccum and they started doing same thing. Not even two months old. It's something with Milwaukee.

I've googled how to recharge a battery that reads bad. The big snap on batterys. Pretty much jump start the bad battery for a while

I’ve been buying a lot of m12 stuff recently. I wanted a grinder recently and I bought the m18. My catalog that comes with all of the Milwaukee tools is missing a couple of things that I’m used to seeing on it. One is the fuel multitool. The other is the fuel pin nailer. I don’t know what they’re up to with m12. I’m looking at dewalt stuff.

Same here. Milwaukee Tool are better than Dewalt but i buy Dewalt for the Battery life and better Chargers.

Take that to the Milwaukee shop and exchange the both ...mine did that let it fully die charged no problem after that

Push it in harder I bought mine and didn’t push battery in hard and it was doing that lol

What is going on with Milwaukee chargers? My M12 4.0 did the same thing as the video. M18/M12 RapidCharger blinks red/green then the charger trips, same thing with a new M12 charger. Unplug both charger, it will reset in about half an hour, leave it plug in won't reset. I pull out an old M12 charger (but never used) from the garage then it started charging and reach fully charger very fast within 10 seconds. That couldn't be, battery only half charged. I put it back to the same M18/M12 rapid charger then it starts to charge for about 15 minutes to fully charged. No idea why never used 5 year old M12 stored in the garage start it up when all the other charger just blinks red/green than tripped. Only variables are the M12 is older and garage is a little cooler. Maybe put the charger in the fridge then try if it works for you. BTW Milwaukee wanted about $80 since I couldn't find the receipt but believe purchased within the 3 year warranty.

I have the same problem wit a new 6ah m12 battery

Have you paid the monthly subscription through their app?

Wilfaukyee batteries SUCK. I've got a bunch of m18 and m12 batteries, and they've been nothing but problems. I never had my charger go bad, but so many packs just flash red & green. And with very light use. Frikkin' expensive garbage. Never a problem... NOT ONE... with Dewalt. "Red Lithium" my arse.

Ffs Just opened 2 brand new m12 6.0 that ive had for years & they wont charge, warranty over

It happened to me when I dropped in a empty bucket but it was some water on it .. and the screw at the bottom part start to get rust or corrosion. Anyways that’s when my battery starts to fail.

My battery did the same thing. I Bought a generic charger. That one charged my Milwaukee battery.

Got this going on right now. Just knocked out my second charger like that

Same exact thing happened to me. Thankfully I got the m12 6.0 for free through home depot promotion. I wonder if they were giving them out for free because of that. No way that Milwaukee doesn't know.

There is a bad chip or mosfet in some M12 battery’s …. I got a combo kit and one of the 6ah died on me the first time I drained it down all the way … the other one started acting up on me and if I drain it down to shut off … I have to wait 24 hours before it will take a charge.. so it’s going back… but besides those two batteries… no problems

I have the same problem with the 6.0

Great I just brought one yesterday and try to charge it today and its doing the samething.

I've never had my bad batteries "brick" any of my chargers , but I've got like 7 of those single M12 charges. An don't even use them cause I bought the 4 bay battery charger. But what I've had happen to a few basically brand new batteries, I've had it happen to 2 of the small 3 amp batteries. And 1 of the 6 amp batteries, both barely ever even used. Which I think it's cause I have too many batteries, and so I have to alternate them. An a lot of times some will sit around without being used, for too long I guess. And when I go to use them, even though they're never used. They no longer work, an so the flashing lights.

Hey I know it's not Milwaukee, but I had the exact thing happened with me but with craftsman batteries and charges, found out they had a batch of bad batteries. After a month of playing phone tag they sent me 4 new batteries. No problems. Again I know it's not same brand, but found it coincidence

Bad pack ,internal short

My 3 month old battery start doing the same

If your battery gets below a certain voltage these smart chargers won’t turn on to start a charge cycle, because they think it’s bad/defective. Batteries don’t go bad. What you need to to is jump it with another battery. Best done with another battery with same or more output. But can be done with a 9v if it’s all you have. Put a razor blade in between the positive terminal of each battery and another in the negative terminal of each battery. Take some alligator clips and connect the positives then negatives and allow to sit for about 2min. If your going to use say a 12v or 9v battery allow to sit for a bit longer. Take negatives off then positives and put your battery in the charger, viola. Should be back to using the battery weather for the first time or reviving a oldie but goodie. Hope this helped. Also, for anyone who has a trickle charger, you will have the same issue with a depleted battery. You might think the charger is bad or the battery and it’s only because when a battery is dead and only has a charge of say 5v or less, these newer chargers won’t read them and hence, will not charge them. You need to get a jump charge then proceed to use the charger.

I bought a 6.0 2 pack battery nd now both them dont work on the charger they brand new to only used for a month or two i think its the 6.0 ones

Mine did the same …found some weird internet page..and the charger can be reset…it worked but yeah I forgot…

Same issue with mines?!?! I went thru the same but idk what to do with them?

Is the battery is a knock off? They make fake Milwaukee batteries. They look nearly identical. I am having the same issue with a BRAND new xc 6.0 battery that I bought from eBay..... I think I bought a fake...

Same with my xc 6.0

Brand new battery pack with chainsaw and its flashing. What do you suggest i do?

Have you tried turning it off and on again?

Unplug the charger to reset the circuit

Mine bricked 3 quick chargers all together never to work again

I have one same issue

If someone knows how I can fix them please let me know. 👍

One of the 3 front pins is bent in, therefore not making good contact with the charger trying to read cell voltages or pack temperature. Gently tug them forward away from the plastic

Cause it's no more good it happens..

What does bricking mean

itys doing what its suppose to do

read the manual dude

Has nothing to do with the charger. The voltage on the battery is too low. You need jump start it with another battery for a couple minutes to bring the voltage up enough to where the charger will be above its limit

Weird!

Fuse

Check metabo

Dumb video. It’s your battery not your charger. A battery can not break a charger.

Get Makita.. 😂