Milwaukee
48-59-1812 Multi-Voltage Charger, M18 & M12
Key Features
AI Generated- Keep your shop organized with the space‑saving charger from Busy Beaver in Delmont, PA.
- Use it on the job, at home, or wherever power tools are needed.
- One device powers all Milwaukee M18 and M12 packs.
- Optimized charging sequence saves you time on the jobsite.
Delivery and shipping
Local Delivery
Shipping
Return Policy
Easy returns available. Eligibility rules may apply.
The Milwaukee 48-59-1812 is a multi-voltage charger designed to power all Milwaukee M18 and M12 battery packs, eliminating the need for multiple chargers on the jobsite. Whether you're using compact M12 batteries for lighter tasks or high-capacity M18 batteries for demanding work, this single charger handles them all, keeping your cordless power tool system organized and ready to go.
This charger solves the common problem of managing multiple charging devices and reduces downtime by automatically sequencing battery charges so you don't have to monitor the charging process. The charger communicates directly with each battery pack to monitor cell voltage, temperature, and charge status. A sleek, space-saving design reduces clutter on the jobsite while keeping your tools powered and productive.
Features and Benefits
- Multi-Voltage Compatibility: Accepts all Milwaukee M18 and M12 battery packs, so you only need one charger for your entire battery collection.
- Sequential Charging: Automatically charges batteries in order, minimizing the time you spend managing charge cycles on the jobsite.
- Smart Monitoring: Intelligent communication with each battery pack monitors cell voltage, temperature, and charge status to ensure optimal charging.
- Fast Charging: Powers up compact M12 batteries in 30 minutes and extended capacity M18 batteries in 60 minutes.
- Space-Saving Design: Sleek, compact charger reduces clutter on the jobsite.
Specifications
- Brand: Milwaukee
- Model: 48-59-1812
- Input Voltage: 120 V
- Output Capacity: 3 Ah
- Battery Compatibility: All M18 and M12 Milwaukee batteries
- Battery Included: No
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Reviews
Customer Reviews
HELP!
New to Milwaukee and took the leap and bought this charger with the M18 RedLithium XC5.0 Battery, and the M18 FUEL 18 Gauge Brad Nailer at my local hardware store. Opened the charger and the battery to get the battery charging and upon putting the battery on the charger I got a flashing red and green light. The instructions say either the battery or the charger are faulty and there's no way for me to know which as well as no way for me to move forward on my project.
Need International 220V Charger
Why can't you make your chargers work from 110-220V? I do a lot of work overseas and have to use a transformer with my Milwaukee chargers.
Charger rapid
I got mine in the middle of summer with a battery kit, it quit working on me lucky me i have more then one charger $
It worked a few times.
Have two of these chargers, both have stopped working. I use my tools a good bit for work so really would like to not spend any more money on chargers.
Red and green lights flashing
I have the same problem of another review. My charger is just flashing red and green. No very happy with this.
Poor quality. Please do better
I have both M12 and M18 batteries and tools. I wanted another charger for convenience. Bought this and right out of the box the M12 side indicates the depleted battery is fully charged by a steady green light indication. I have always trusted Milwaukee for superior products and this one has let me down.
Already failed.
This charger just stopped charging one day. I was surprised. I have been buying Milwaukee tools for over 20 years and none of them have failed. I thought the charger would be another high quality Milwaukee tool. It didn’t give any warning. No sounds or longer charging time.
Great charger
The charger is great. Charges up the battery quickly. Easy to use.
New to Milwaukee just night my first set ?
Pretty good so far sometimes tho they made be dusty from use on job sites the charger doesn’t always lock the first time. Overall good ? quality drills in the set and charger
Died on 3rd use ..
Got this for Christmas as I now have many m12 and m18 tools. The 3rd use I tried to plug in a m12 while a m18 was in it and all the lights went out and now it's a brick. I bleed red tools and this is the 1st time it left me stranded on a job. I would not get this until th ey fix or update it. Now I have to delay a job.
Does not charge M18 XC Forge batteries
The product claims to accept all M18 batteries, but this is not true. My M18 XC8.0 Forge battery does not fit the charger, making it impossible to charge with this device. Now, I have to research and purchase a new charger for the battery, despite already owning several 48-59-1812 chargers that have worked well.
Failed in 10 minutes
Worked for about 10 minutes and then completely failed
Stopped working
I’ve had this for 10 months and it stopped working out of no where. It’s located in an airconditioned work space and it used about 2-4x per month which I would call light use.
Great charger
Having this bi voltage battery charger makes it so efficient to re charge my batteries m12 and M18.
Keeps me ready to go
Have several of these to keep all my batteries charged at work, home and at my shop. Very convenient to be able to charge both the M12 and M18 batteries.
Battery Charging
Charges batteries way faster than expected. Super happy! Allows me to get back to my jobs quickly.
Better than no charger
Always a great charger for on the go and being able to charge two different battery types helps a lot. i have a few of these and this one came in a comb pack but its still better than nothing.
If Milwaukee can fix issue then Yes
BOUGHT THIS AS A COMBO XC6.0 X2 REPLACEMENT PACK. ITS BEEN LESS THAN 6MONTHS SHOWING DEFAULT. Model 48 58 1812
]need to know how to sent it back
have it and it makes loud noises whjen it isd charging
M I L W A U K E E
I love this product and brand. It never lets me down ! I have a lot of tools but a thing for Milwaukee so needless to say more then one of these chargers are in my collection and as it stands right now after being used and abused for a while still work as good when they were first purchased!
New charger works as designed
Good tool. Seems to need routine resets though I’ve had to reset 50% of charging times
Good and basic
Straight forward basic charger that does the job fine
Convenient Charging
Convenient combo charger. Does the job well. Worth the buy.
It works.
I bought this during a promotion which included a free oscillating tool. I’ve been happy with the performance and durability of my Milwaukee tools in the past and expect to be happy with the performance and durability in the future.
M18 and M12 chargers
I own bother the M18 and M12 chargers and have not had an issue yet. They both charge really fast and allows the project to continue without a hitch. I wouldn't own another power tool.
charge it up
Took awhile to figure out how to adjust battery in charger to start and continue charging
Easy to use charger
Easy to use, charges quickly, and maintains batter once fully charged.
I would buy this again.
I use this to charge M18 Red Lithium XC5.0 batteries and never had any problems. If the environment im working is extremely hot/ cold I try to get the charger and battery to a decent temperature before charging. I also think its important to keep all contacts clean and make sure to have a clean & ventilated area.
Works as advertised, however gets very warm
Works great, it charges batteries sequentially and is fast enough so that by the time one of your batteries is dead the other is charged in a manufacturing setting workflow. We have mostly m12 tools, however in the stations that we have both m12 and m18 we have one or two of these. When charging lots of batteries one after the other after coming back from a job the charger and batteries get very warm however.
Mostly you get the red/green fault
Very difficult to make it charge correctly. Most of the time you insert battery you get the red/green flashing fault condition. Very loose battery/charger fit compared to DeWalt chargers.
Love the product.
I used it with only M18 batterys and all of a sudden it won’t due anything and I need it the most.Is there CS around that can help me with this issue please. I need to charge my M18 blower and M18 Fuel hammer drill…
It should work.
I bought the 48-59-1812 charger in a bundle last year. I only used M18 packs with it. All worked well. Yesterday, I bought a 2475-20 M12 inflator, and a 48-11-2420 M12 battery. I put the battery into the M12 charging port, and all it will do is flash red-green-red-green. It will not charge the new battery.
Force it on.
I found that the M18 battery socket alignment is off. This makes it hard to get battery on terminals.
CHARGING BATTERIES 1 BY 1
Standard charger pack... works as it should and has led lights
Feeling recharged
Say what you do, and do what you say. This product recharges me, I mean my batteries as advertised.
The charger works out great!
Love the tools and products guys put out. We use these tools every day. Very happy
Great product!
Charges fast and the battery holds power forever it seems, I will always purchase Milwaukee brand
Amazing
everything is amazing: quality, functionality and price!
Yup
I've only had it about two weeks, but yes I am glad I got it
Charges fast
Good unit, works well. Charges fast and indactor lights are good.
Ease of use
Works on both 12 and 18 batteries. Now I have 4 so it take so much less time to charge.
Good
Very good option for work. Best quality. I love it)
Battery not connecting to charger.
And doesn’t happen every time. But more often than not, the battery does not connect with the charger, and you have to take it off and on multiple times to get it to connect.
Quiet
It's very quiet. It's so quiet that you don't know if it's charging or not. Ideal for sites where you want to concentrate on your work quietly.
Charger Faulty
Just got this up at work with new impact driver. Plugged in, inserted battery to charge it, and charger flashes simultaneous red and green lights which, in the OEM book, states that indicates a faulty charger. Have used Milwaukee for years and first issue I've had with any of the tools.
New Charger
My last charger made it 13years before it was dropped probably 1 too many times. This charger accepts older batteries, charges the 18 and 12 volt batteries and show cases when there's an issue, what else could you ask for.
Works as it Should, high price
functions as intended. quick to ship. very high price
GOOD BUY
GREAT CHARGER CHARGES FAST AND IS VERY DURABLE WOULD RECOMMEND TO ANYONE
M18 charger
Fast charging time, a little smaller size would be handy for m setup.
Battery charger
This charger works well, but makes a humming noise while charging
Great tools-poor chargers
As the other reviews indicate, the chargers don't meet up to the reputation of the tools. I have 2 failed chargers, one with a 2014 manufacture date and the other a 2017 date. I may have to get an aftermarket as one post mentioned. It is sad because I have a very large selection of Milwaukee M18 tools and the weak link is the charging system.
Bought 2
It's charger does what it's supposed to do I want the M18 two of them works very well so far
Options are always good
It's a nice option to be able to charge either 12 or 18 volt batteries. I have the charger mounted in the back of my work truck plugged in to a inverter with an on/off switch in the cab, so I can easily charge batteries for my driver/impact (M12) or vaccum/hackzall (M18) on the way to a job site and back.
Works
Does what it is suppose to do. Can't use the tool without it.
Second charger and still a problem
The charger was bundled with my M18 Oscillating tool. Out of the box, it was flaky at best. You needed to slam the battery into the charger for it to work. The charger with my drill/driver was smooth as silk and worked fine. Contacted Milwaukee and 10 days later new charger arrived. Same issue. You literally need to slam the battery into the charger for it to work. Clearly they have changed the unit in the last few years. Don’t rely on this charger, find an alternative. Doubt I will go for strike 3. Anyone know of another company that makes Milwaukee M18 compatible chargers .
Not wanting to charge new battery
I just bought the M18 drill combo kit a day ago and wanted a bigger battery, so I just bought the 4.0 battery and when I went to plug it in it would charge for about 20 seconds then start flashing red and green. The battery pack doesn't want to stay on the charger properly either and has a bunch of play to it.
Simplicity
I have both M18 and M12 tools so it’s great only needing to carry one charger around for both tools
Don't buy this charger. Failed after 2 months.
This charger came with a M18 compact brushless 1/4 in. impact driver with 2Ah battery. I have used this charger about twice a week for the past two months. The last time I used it, it charged my M12 battery, but eventually the light was off on the charger. Tried a new outlet, tried different batteries both M12 & M18, still doesn't work. There is no fuse to check accessible to the consumer without taking it apart.
Long time user
I have been using M18 tools for 16 years, my first charger was a 48-59-1801 for use with M18 Cordless LITHIUM-ION 2 ah. Now I have batteries from 2 ah to 12 ah High output and this charger charges them all. For someone who has cross generational batteries and tools this charger is the answer.
Problem with charger
Redlithium XC5.0/CP2.0 charger starter kit purchased May 2020. After the 2nd or 3rd time using this charger (January 2020) the solid green light came on while attempting to charge 5.0 battery, which was drained, and would not charge. Tried charging 2.0 battery and same thing happened. Love the drill but hope this isn't an ongoing problem with chargers.
Does not charge batteries
I currently have 2 Red Lithium 5.0 batteries, one with flashing red on the charge indicator, one with 3 bars. When I put each of these on this charger, the red "charge" light illuminates briefly, then it goes to green within a second. Does not charge the batteries. Worthless.
Charger quit after light use
One day it worked, another it died. No trauma or misuse. Unrepairable.
Charger is dead.
Like that other guy said, great tools but the chargers stink. I have only used mine a total of about10 hours and it just died.
An hour old!!!!!
I can't even charge my brand new batteries!!!!! The light keeps flashing red/green/red/green!!!! I am not sure if I will buy another Milwaukee product.
Max charge current 3A - that's not serious!
Charger was produced in the period when 3.0Ah batteries were used. But later, when 4.0Ah and even 5.0Ah batteries have appeared charger wasn't updated, so "1-hour charge" statement is not true anymore.
Charger Milwaukee 48-59-1812 M12 and M18
Right out of the Box, Did charge the Battery but when it is charged [four LED's on the Battery] the Red light never goes off, I had three new Batteries. Will send it back Monday
amazing charger
Amazing charger.
Automatic swap when charged, nice, no ne
Need car charger that does both.
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