Milwaukee M12 Charger - 110/120V to 220/240V Voltage Conversion

[@zivbarak3586]

Dude, this is one of the best tutorials I've seen - You're the best !

[@loneoceans]

Thank you, I'm glad it has been of some use.

[@nigelmainsail]

I’m afraid I ignored your final words of “don’t do this if you don’t know exactly what you’re doing”. I followed the rest of your advice but used a MOV with part number 10N471K. Your explanation was absolutely excellent and I even felt that I was starting to understand how the power supply worked. I plugged it in and appear to have fully charged an empty battery without any explosions or flames. The MOV I used is the same physical size as the original, a fair bit smaller than yours. I assume it’s ok. I’m only one charge in but will monitor very closely while using for a bit. I’m very happy and very grateful, thank you!

[@earthwormjim]

Fuck Milwaukee for not using a PFC switch mode power supply which could handle autoranging. Power supplies are dirt cheap today, there's no excuse for this!

[@patrek.g_minato2208]

Hi the practice of bring a layer of thermoretractil is simple, when have a voltage over the nominal, the MOV explode and fire , for protect the card and other components are use the thermosrink protection, best regards from Santiago of Chile, in the corner of the World. Very practical and didactic explanation.

[@edwardmagri4590]

Awesome video! Extremely well explained! Just did it and it worked flawlessly! Thumbs up!

[@nikzag9160]

Excellent explanation. I couldn't find, here in Greece, the V14E300P so i used the SIOV-S20K300 . It works great.Thank you very much!!!

[@WaltonPete]

It would be interesting to see how an original 250v version of the charger is configured. Nice conversion btw.

[@owenjoseph6097]

What a great video! So clear and we'll presented. You left no stone unturned. Subbed!

[@kattach0]

@loneoceans great video. do you have one for the 12/18 milwaukee charger?

[@lwyr9152]

Thumb up to your detail explains!

[@srpacific]

It looks like they've revised the design to a way simpler board in the charger you have, compared to some other charger teardown I have seen. Do you think it would be possible to bypass the AC to DC power supply side of the board and have a DC input? I haven't yet measured my charger to see what the DC side runs at voltage-wise.

[@dariusdomarkas5300]

Thanks for the detailed explanation. Everything works great. However, I did not have the opportunity to purchase your proposed V14E300P. So I used ERZV14D471 RoHS Cheers from Lithuania.

[@loneoceans]

Thanks Darius, I'm glad it worked out for you. The part you chose looks like a suitable replacement.

[@darko8069]

Hello i want to ask if it can be used a mov with 275v ? Or to go to a biger one like the one in the video ?

[@AzN_devil]

confirm this still works with recent purchased charger i cut the trace and replace varistor with a MOV-20D471K

[@luismaflorentin]

Awesome explanation! Thank you very much!!! Cheers from Argentina.

[@criscolrus1530]

Hola soy de Argentina q varistor usaste?

[@alanbellerby6265]

Hi, Is it possible to convert that charger to charge in car on 12vdc input

[@woodziss3888]

Thanks! Tried and it works!

[@Error448]

Done and working. Thanks a lot!!

[@andrewgreene2902]

QUESTION: After this Charger is Converted to 220v, is the Charger Still Usable with a 110v Input.?

[@NathanNostaw]

I know this is an old video, but to anyone reading this, is there a way to patch in a 12vDC feed to convert this charger to run either off AC, or 12v? All the car charger units use 5vusb and that is just crazy slow and inefficient. Why convert 12v to 5v to charge 12v? Daft.

[@caambata]

Do you know what mosfet was used? It was mistakenly connected to 220V and it burnt the switcher. I will cut the neutral line so it will not break but offline switcher is toast, i do not know the part number.

[@jmac213stuff]

has anyone tried to bypass the hi-voltage side and go to the battery charger protection circuit from 12v (car battery)?

[@matanmatan3900]

Is the 10D471K varasitor fits?

[@matanvaknin2036]

Will the conversation makes it a dual voltage charger? Or only 220v so that 110v cannot work anymore?

[@loneoceans]

No, the conversion does not make it into a dual voltage charger. It is possible to add a properly rated switch to toggle between the two input voltages, but one must be aware of the safety implications.

[@daveross6506]

What will be if the MOV will be connected after the PTC resistor ??

[@nathanielshafier8729]

Would it now work on both 120v and 240v AC input power?

[@loneoceans]

Would not recommend to do so, though it may work. After the modification, the input voltage to the DC/DC converter will be half of what is intended. Given that the converter is a step-down, depending on how it is designed, it may still function but may result in unexpected results.

[@Dany1B]

Hello 12v471k TNR can be good also ?? Its 220v

[@seawtang]

what is the difference if i use varistor 14d301 vs 10d471? which one is more suitable?

[@magnushauge1576]

Do you know if epcos S14K300 300pf is good enough?

[@tonychamberlin9932]

My step down transformer was not set correctly and mistakenly plug my charger in and smoked it. It looks like it over charged the capacitors as the are now leaking. MOV looks fine. Do you think it worth fixing? Are there other components that likely got cooked?

[@bikerboy6985]

What about m18/m12 charger it’s the same thing?

[@xhrisxiong2915]

If the 120V unmod unit was plug into 240V power, what will it does? does it just damage the 175VAC MOV only or will it damage more beyond? Since the unmod unit is not cute at the bridge. Also what if replaced the 300VAC MOV but not cutting the bridge, what will it does.........Just curious?

[@piratsik7691]

I just repaired one that was 120V and plugged into 240V. The MOV was not damaged. The Fuse(F1), one of the capacitors(C3) and two of the diodes in the rectifier were blown(D103,D104). If you do not cut the bridge between the capacitors, you're going to exceed the capacitors' rating and blow them up.

[@TITAN9389]

@@piratsik7691 i have same problem, how to check if the diods are fine or not ? i just see one of my capacitors are blown (liquid on the walls), the fuse and the mov are fine.

[@piratsik7691]

@@TITAN9389 You can check with a multimeter on diode mode. Better desolder one side of each diode you test so the rest of the circuit does not affect your readings. If the diode is good, one side has a small voltage drop (reading maybe 0.6-1V) and the other does not conduct(reading 0L). If it's bad, it will either be open(0L on both sides) or shorted(~0V on both sides).

[@TITAN9389]

@@piratsik7691 thanks !

[@Eddiya]

Awesome video, no idea whats going on with circuit board but guess I can cut the trace and soldering lol

[@jackofalltrades.]

How do I do this for the supercharger ?? Help please

[@corel965]

Can this work on other components like smd reflow station ??

[@golanpeled8960]

so , why not removing the varistor and cutting the circuit? also, I don't understand why you said half of the sin wave is 170v, it's 55. having said that to my best understanding and even based on your analysis of the circuit the cutting of the circuit is not necessary...

[@dragoszait]

I accidentally plugged the charger into a 220V without doing this modification. Now I have done all the modifications but it still does not work. Any advice on what should I do? Thanks

[@lwyr9152]

try to replace 10N271 to 10D471, replace two 200V capacitors with same one

[@andrewgreene2902]

Dear loneoceans poster, Can You Please ANSWER the QUESTION posted Below.?

[@myelectronicsworld]

Crystal clear explanation. But how about the 60Hz / 50Hz conversion;)

[@luismaflorentin]

After the diode rectifier the frequency doesn't matter because it converts to DC current.

[@myelectronicsworld]

@@luismaflorentin Right. I was thinking about linear power supplies where you have a transformer which heats up a little bit if you run it on 50 Hz instead of 60 Hz.

[@luismaflorentin]

​@@myelectronicsworld Right! Cheers from Argentina!

[@azkihsas]

I want to modify a Ridgid drill's charger from 110v to 220v. Can anyone help me

[@MrArik11]

i have heard that it's enough to cut the connect over there without to replace varistor make sense???

[@stevsonsonsh.5995]

No. As common sense will lead you to thinking why would you if the current one is up to 175V and you want to plug it into 220. You can just cut it but then you are going to lose the protection.

[@slavastaniUA]

It's work fine !

[@djSchlomo]

Thank you, works good!

[@vintage_tube_audio]

excellent explanation thanks

[@mariotovar4762]

i have a 220 volt M12 how i can convert to 115volts......give me the schematic.....tihis one only has one input cap

[@loneoceans]

I do not have a 220V unit so unfortunately I cannot advise you.

[@mariotovar4762]

@@loneoceans u have a 110volt.......give me a simple drawing how is made¿ i will transform my 22o volt copying your arrangement.......take a close photo of both sides where you segmented the PCB.......

[@joual2]

Hello Mario I have a new charger M12 110V and I need M12 220V

[@matanvaknin2036]

do you cut and replace the cable or plug? to euro plug

[@loneoceans]

The easiest solution is to use a wall plug adapter 👍

[@matanvaknin2036]

loneoceans thanks a lot! Any chance you can do a video for dewalt dcb115 charger?

[@shadowzedge5793]

Does this lower charging times as well or does that remain constant regardless of voltage?

[@loneoceans]

This will not change charging time, from the perspective of the downstream charging circuit, there is no change.

[@ewong1]

Main fuse has to change to 240v and half of the current rate if you don't want your house burnt.

[@rafsanuddinbegrizan8090]

Can I use MOV-20D471K-ND?

[@loneoceans]

Yes that is a similar substitute to the V14E300P, albeit physically larger.

[@muharraqi55]

Hi boss, i watched other videos they are changing two diod Dose we need to change the diod or only varistor is enough Best regards

[@eldad500]

Works great

[@factor23_]

Thanks

[@aquacoolg]

can I use 10D471K instead?

[@loneoceans]

Yes that looks like it will work (same voltage rating as the V14E300P, just less surge capability).

[@aquacoolg]

loneoceans thanks for your reply, i will give it a try.

[@glenntagaylo2339]

@@aquacoolg Hello mate, did the 10D471K Varister work?

[@aquacoolg]

Glenn Tagaylo yes it does

[@glenntagaylo2339]

@@aquacoolg Thank you mate. I'll go buy varister now and replace the current one. I bought a step down transformer 220v to 110v output at 100watts...It doesn't work. I'm not sure why. Just tested the 110v output and seems working.

[@markro321]

aqui en peru no funciono, regrese las cosas como antes y todo trabaja ok PD use un 20d471k

[@bojanbor]

Greetings from Serbia! I have a Milwaukee charger type 48-59-1801 that needs conversion from 110 V to 220V. Your video is by far the best one on KZbin with your explanation I tried my best to locate that bridge that needs to be cut but could not locate it. Is there a way to contact you via email and maybe send you some photos and hopefully you can point that bridge for me. Thanks in advance.

[@andyglass3882]

Awesome video, by far the best out there. Very well explained not just this what you do, but this is what this does. Could you please send me your email address, I have a question regarding the easiest way to convert a Milwaukee 12v charger or 18v and 12v into a British building site charger (here on building sites we use 110v on a yellow commando plug) at first I thought easy change the plug with an American 110v charger put that doesn't change the fact here we use 50Hz not 60Hz. Any help please

[@loneoceans]

Andy, thanks for your comments. The line frequency (50Hz or 60Hz) shouldn't affect the operation of the charger since it is rectified into DC anyway. However, I can't speak for other chargers other than this exact model, since other models may have different designs internally.

[@andyglass3882]

Huge thanks for your prompt reply, you are a true gentleman. Am I right in thinking that as long as the charger has a rectifier in it, the input frequency shouldn't matter because it gets changed to DC? Is that right? Or have I misunderstood? Many thanks Andy