Fix That Milwaukee M18 Battery That Won’t Charge. 🧐

[@ronaldarchibald2506]

Just did this and it brought my battery back in service. Took few times to get a good connection between batteries. I left them connected together 25 minutes. It worked. Saved me buying a new battery eventually.

[@StruckWorx]

Nice!!! I only had to do it twice . One with this battery and the first one I did that wasn’t mine. So far both are still working .

[@chrishart6286]

Dude! This actually worked! This is literally the best video to date! Thank you man!

[@rwest1818]

Tried this, It works!!!, I was at wits end as Milwaukee anything costs a fortune, I had two batteries I had left in the tools and they "died" I did as you said and they both miraculously came back to life!!, I figured ok maybe the battery I had left for over a year, refusing to throw it out, for some misguided reason, I just tried it this morning Guess what?? it has come back to life. Thank you so much for the video and advice, This little video has saved my favorite tool batteries from the trash man!

[@ForrestGump1212]

I never leave my batteries connected to my cordless tools. After you finish using them, ALWAYS take the battery pack off. The batteries will last much longer. :)

[@ericwrice]

It worked! I did this trick, used it for a bit, now it’s actually charging. I can’t believe it. Thank you!

[@kylenunn7226]

Totally worked! Brand new batteries, still in the package but they were sitting for 5-6 years and wouldn’t take a charge. Now they’re fixed, thank you!

[@StruckWorx]

Nice!

[@SamLarter]

Thanks, I had a battery that wouldn't go past two bars and did this. It now fully charges.

[@StruckWorx]

That is awesome to hear!

[@bobe4423]

Nice surprise for me cause this worked! I was about to toss out that battery. Thanks ! One note, my wires got very hot. Be safe out there.

[@bottledwaterprod]

You might wanna use a 20v car fuse on the positive end just in case. Not just for safety, but you don't wanna end up with 2 dead batteries.

[@StruckWorx]

That is a good idea too,

[@allmycarsisbroke]

Which end is the positive end?

[@jccaquias01]

What is a 20v fuse

[@colincutler194]

Do you mean 20amp fuse?

[@ruidadgmailcanada8508]

@@allmycarsisbroke the one marked with a “+”. The negative is “-“. Also use a 20A car fuse along the wire on the + side for safety and to protect the good battery.

[@dominicgingras910]

I did exactly what he said it didn’t seem to work until I put the battery into the charger and it started to charge up then turned green after 5 -10 min Works on my router just fine. Awesome video. I’ve had this dead battery for like 3 years and just couldn’t throw it out at 100 bucks a battery.

[@StruckWorx]

Nice!!! It only happened with one battery as of now. I totally get it with the prices of them . My oldest battery I would put a 8 year lifetime on it and still kicking .

[@Theofficialcope]

I have three batteries in my garage that do this, I currently have them hooked up the jumper wires and am anxiously awaiting results thanks!

[@kappasigds]

just did this trick. left the batteries wired together for 30min. still giving me fast blinking one bar on bad battery. plugged it on the charger for 5 seconds and pulled it off. had full charge and worked perfectly. thanks.

[@WhatDaDillio5]

Tried this today and had it work for the first battery set. The second battery set burned up the wire and about started a fire in my garage. It killed one of the batteries entirely, but one of them is still okay. Kind of terrifying! Probably not doing this again.

[@javidakbar74]

I was about to open it up and charge each bank in there. But i saw this video and followed your way. And i charged it with my yihua charging and soldering station for about 20 minutes then inserted the battery back to the milwaukee charger for 5 second and pulled it out and pressed the button and all power came back. Thanks for the info.

[@tonycalhoun8292]

This is gospel, worked for me anyway. Thank you sir.

[@chrishayes901]

I just tried this on a 5.0 battery that the charger said ws charged but the battery had no power. I put it back on the charger after jumping the battery and the charger still had a solid green lite, I left it on the charger for half an hour and the battery had 4 bars lit up and it worked in the drill! Thanks

[@StruckWorx]

Nice!!!!

[@justotorres8970]

Man thanks for this video it worked for me too. had a battery that I hadn't used in a while and no lights would come on but came back to life

[@StruckWorx]

Nice!!!! Glad it helped

[@texasroots]

This looks to have worked for me too. Thank you. I connected a full(M18 2.0) and faulty(M18 5.0) battery together for about 20mins. No change. Faulty battery still flashing one bar and charger still instantly going green. I connected the batteries together again. I checked their charges again and this time the faulty battery showed three bars charge. I took it to the charger and the charger still goes to green instantly. I pugged it in a tool and it works. I plan to swap this to a frequently used tool and run it down and hopefully then the charger will charge it. I know the serial tells the age but I don't have it with me; I believe this battery is about 4yrs old with relatively light use.

[@StruckWorx]

Great to hear!

[@texasroots]

Thanks for the reply. I used it a couple days ago in my m18 blower and it lasted about 30sec. Battery back to single light flashing. Charger still turns green immediately. I have the bad battery connected to a new battery again. Shall see how this round goes. Think there is any hope?

[@johndough3940]

@@texasroots any update?>

[@cathal212]

​@@texasrootsdid it work in the end?

[@harvey8695]

same thing is happening to me. It worked on a blower for like 10 seconds. It eventually goes back to blinking the first bar again. The voltage after it stopped working was 19.9.@@texasroots

[@Cully-Wully]

Same shit, brand new setup that sat for 2 years on the shelf. 1 battery worked 1 was deemed “defective “ by the charger since the battery was outside the warranty window I figured I would give it a shot, totally worked thanks🎉

[@StruckWorx]

Great to hear!

[@dillongross526]

Had a battery that didn’t work for 3 years! It’s fine now lol now I got my backup back! This really works, an I legit used just random metal lol like from a badge the clip thing I broke it down then flattened it an put it battery to battery for 30 mins my other battery lost one bar an then it finally would charge again/fully charge! People say be careful use a fuse or whatever but I had no issues both my battery’s are good now! Hell ya!

[@jorgedelvalle5569]

Wow. It worked. I was close to throwing the battery out. Also, they don't have to be the same capacity or series. I boosted a bad 1.5 CP, with a High Output XC6.0.

[@mattownsend7406]

Right on. I tried it and it really worked. Thank you!!!

[@StruckWorx]

You're welcome!

[@mikecaster4612]

I never even heard of this type of problem. Thanks for the info.

[@StruckWorx]

It is rare. This was the only one I ever had a problem with.

[@JayTee-fp7ig]

We’ll your lucky

[@irmaztamal21]

Thank you this really work I charged my dead 2.0 Red Lithium Battery using 5.0 RLB

[@StruckWorx]

Sometimes it works and sometimes it doesn’t . Maybe a production issue which I’m sure they was demoted or fired . Quality control 🤷🏻‍♂️

[@chrispewkreme]

I’ve done this was some really ok craftsman batteries I had. It’s always worked. But I tried the same thing with my Milwaukee battery and no luck.

[@yusafkhan9347]

Unfortunately hasn't worked for me. That's not to say this method doesn't work. There can be other factors also present in my battery that prevent this method from working. Have read comments on this section about the jumper cable burning that is a result of either an additional fault in someone's battery, or jumper cables are too thin and the current (amperage) is strangled when passing along the jumper cables or as you have mentioned many times about polarity mix ups. It's no different to jump starting a car. If the cables get too hot or burn then they are undersized. Perhaps I will try this method again as on the first occasion I used a healthy 3ah to jump a faulty 5ah whereas I should have used like for like i.e 5ah to jump a 5ah. If it works I'll definitely drop a comment about it. If I don't reply back its because I'm still trying. Thanks anyhow, the video was clear and concise. Hate long winded videos before they get to the point, by which time I've usually skipped to the next video.

[@coleslaw8909]

Thx man I appreciate it! These tools aren't cheap, I've not had much problems with any of my Mil tools, except 2 batterys...and this worked. My had Sat below zero in storage for a month I was curious the consensus of this happening. Anyway Thx man stay safe

[@StruckWorx]

Glad it worked for you too.

[@markhuisinga1698]

Thanks. I have a 1 yo 9ah battery and I left the milwaukee usb power adapter on it with the adapter turned on. I will try this and hope it works. It's an expensive battery to be just bricked.

[@StruckWorx]

Glad I could help

[@ericmccollom7]

Thank you! My charger was flashing red then green when I tried to charge. I used the fuse trick and let it sit a couple of minutes. Threw it in the charger and bam!

[@StruckWorx]

That’s great to hear!

[@derekmcloughlin657]

What fuse trick ?

[@pamu9366]

You can explain more clearly or record your own video how did you make this fuse trick because I have similar behaviour from my charger flashing red and green , and battery flashing only one red bar .

[@MarioPerez-de7zw]

Did your working battery get super hot? Also, did it work afterwards?

[@xa6869]

nice but Should they be the same battery or does it work on a different battery?

[@StruckWorx]

That I never tried. I would think so

[@snapshot5608]

thank you this worked perfectly even when the light didnt come on at all

[@PNWLiving1725]

Nice, I'm glad I didn't throw mine away!

[@dzhg2753]

Great video , I have the same problem with my replacement battery. Thanks Mafia !

[@StruckWorx]

Thank you and glad it helped

[@dzhg2753]

@@StruckWorx Initially only 2 bars, Tried and charged from 2 bars to 3 bars, but never to full 4 bars.

[@newleaf1534]

@@dzhg2753 hes part of the mafia? Ahh hell no im outta here

[@jackstone2764]

it was working… thank you very much .. i can’t not believe ❤❤❤

[@StruckWorx]

Awesome

[@chincewilson6874]

Thank you my friend I truly appreciate your kindness and wisdom! Of all else Hope you have a wonderful day!

[@StruckWorx]

You too!

[@ruth9370]

It didn't work for me. My older original battery still works but has only a 15 minute life span and then charges up in only a few minutes and works again for 15 minutes. Newer battery sucks.

[@dirtleg13]

Unfortunately this did not fix mine. I believe I have a bad internal control board but will disassemble it first to verify all the cells are good before replacing the board.

[@colincutler194]

I am having the same trouble. I hope this fixes my battery. Thanks for posting.

[@StruckWorx]

Your welcome

[@Entusiasticuser]

Thank you so much.. I have a dead battery which I was about to throw.. I did your way and worked🎉🎉🎉

[@DMTXXDMT]

what are those cables called? Thanks

[@maglioquiroz4129]

I did the same but charges ones and later won't charge any more just 1 led turn on and blink

[@StruckWorx]

That I wouldn’t know . Sorry

[@maglioquiroz4129]

I try to do it again but doesn't work anymore only the first ligth blink and don't charge

[@mcreed15]

Be careful if you aren’t electrically inclined like me…did this with a dead m18 5ah/green light. Hooked up to a full m18 8ah and had a little fire, fried my wires, 8ah is ok, and back to square one with the 5ah lol.

[@StruckWorx]

Ouch

[@demolitionman3991]

Sound like you didn’t jump positive to positive and negative to negative . Maybe got it wrong way round and it’s fried the wires 🙈.

[@victoryang2094]

i have two 12s that are only charging up to 3 bars any suggestions?

[@narwhal9852]

Worked on twelve 6.0 batteries a guy was gonna throw away. Saved myself quit a bit of cash😂

[@Yasermiami]

Tried it but now when put the battery on the charger there a green and red light flashing constant any advice ??

[@bobit8742]

will that battery charge after this? mine still won’t charge after, the charger light green when battery has 2 bars

[@StruckWorx]

I haven’t had no problems since with this batt

[@pedrovaldez9559]

Excellent video! Made my jumpers exactly like yours. 😆

[@StruckWorx]

Great!

[@GhalebAtie-g8g]

Hey do both batteries have to be the same volt amount for it to work ?

[@StruckWorx]

I’m not a electrician

[@pdh1880]

I know nothing about electrical equipment. What are those cables called?

[@StruckWorx]

I don’t know the tech name

[@JonJon501]

Those big scary fancy technical highly advanced 'cables' are called SHORT PIECES OF WIRE, MAYBE YOU SHOULD PUT A HELMET ON. Be careful out there for real smh

[@panchogonzales6409]

You are the man!...can you re do it with a black and red cables for people like me,!? Analytical retentive.? 😂. Thanks ...

[@StruckWorx]

Great!

[@protectyourcar5889]

Damn i got fews brand new m18 5.0 and 8.0 dont let me charge. It solid green. I dont know wat to do lol.

[@KINGRG1]

So does this allow the battery to charge normally going forward?

[@StruckWorx]

Yes

[@carlospereyra7086]

Car battery, work's too , I do that

[@Disisions]

Thanks I’ll try tomorrow

[@StruckWorx]

Let us know how it went?

[@imokuok1993]

I have 2 like new 12.0 Milwaukee batteries that both won’t charge past half way, I am praying this will fix my problem. I will have to try this when I get back home.

[@StruckWorx]

I only had one battery out of so many that I had this issue . Good luck

[@michaeljanssen4193]

Hey, did it end up working for you? Just interested. Thanks

[@newyorkvs698]

Thank you for the video you save my battery

[@bashile5103]

It worked for me. You don't need to charge it for long. Just a few min and put it on charger and out.

[@StruckWorx]

Great!

[@adrielsalinas348]

Worked thanks for video.

[@k8ty5.0]

Didn’t work for me. My dead battery technically charged but when I put it back in the charger to charge fully to 100%, it still thinks it’s fully charged even though it isn’t…

[@jstuart8812]

Steaming load of bow locks. Just end up with 2 flat batteries, one of which is too hot to touch and made noises ready to explode.

[@StruckWorx]

Yeah that I can’t help you with . Warranty I suppose . I did not have that problem but I only had the one you seen and the one prior . I don’t know bad batch?

[@skuuubasteve14]

I tried this and it "let the smoke out" of my wires :-(

[@nikosks1106]

it's impossible a 18V battery (of any capacity), charges fully an other 18V battery... 😒

[@StruckWorx]

Hmmm I guess it’s not impossible . Sure does jumpstart it as you can see.

[@edwinreyes8828]

I tried i put both batteries together neg 2 neg pos 2 pos for 5mints and than pit it on the charger a for 5 secs and it came back to normal.Thank you very much!

[@StruckWorx]

Nice!

[@tu1469]

I did this with my Milwaukee battery and a dewalt battery but it didn’t work for some reason. My battery just flashes at one bar and shows that it’s charged, when I put it on a drill it makes it work for like 1 second

[@GameCastCubed]

Check the battery voltage with a multimeter

[@StruckWorx]

Hope you figured it out

[@insomniatube7255]

I have 4 batteries like that I really hope it works

[@coleslaw8909]

I had 3 worked on all did u make out good

[@StruckWorx]

Good to hear

[@liren12]

請問 你壞掉的電池是21700 另一顆是18650 可以互接不會有危險?

[@StruckWorx]

I haven’t had no problems good question

[@leighakitzmann424]

I’m a dumb ass I put the blade on them and I accidentally did positive negative and now they don’t Fukin work LOLOL

[@ricoacosta2503]

"I followed all the steps indicated in the video and shortly after connecting the cables, sparks began to appear and the battery almost exploded, spilling red liquid. Now the new battery that I had connected does not work and is damaged." I don't understand all those positive comments if the battery almost exploded and would have caused a serious problem and also to complete the new battery it was damaged.

[@vruvalcaba24]

You probably connected positive to negative happened to me i wasn’t paying attention but i took it off once it sparked and avoided damage

[@StruckWorx]

Sounds like you had it connected wrong or there was some other issue with your battery . Sorry it doesn’t work but sounds like it didn’t work when you tried this hack.

[@Boots0522]

Red lithium =red liquid ?

[@mikeymclucky]

THANK U SIR!!!

[@StruckWorx]

Most welcome

[@HeinekenSkywalker636]

Wow I’m so cool I have battle axes tattooed on my hand

[@StruckWorx]

You too??? Cool beans

[@Coleslawbreakfast]

I do this and the batteries show no change and the source battery begins the same issue. I’m a Milwaukee fanboy, but I have DEWALT batteries from 2015-2018 and they never have this issue.

[@StruckWorx]

This was the only time I ever had a prob with there batteries that I own. I did run across someone elses and this trick didn’t help. Im on the same page as you about the issue with some Milwaukee bats.

[@LamaMatthews]

It will work but It will never hold a full charge again 😂 battery is junk at this stage. Just buy a new one and move on.

[@FernandoDIY]

that's funny because if you put a multimeter to check the voltage in plus and minus it shows zero volts how can you jump start on both batteries LOL

[@coleslaw8909]

One battery is pooched, the other has no problems and fully charged. Have you boostered a vehicle?

[@StruckWorx]

Yeah I don’t know .

[@spacekeebeats3155]

things are expensive but so damn rubbish of equiment

[@StruckWorx]

Only batt I ever had a problem with .

[@spacekeebeats3155]

@@StruckWorx same.. theyre the top brand right now .. somehow their battery is ass cheeks.

[@414roofrepair]

This does work.

[@sergiokalio5382]

Thank you for this video.🫡