Model#: MILN48-11-2440

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Milwaukee 48-11-2440 M12 XC 12V 4 Ah REDLITHIUM Lithium-Ion Battery

  • Milwaukee 48-11-2440 M12 XC 12V 4 Ah REDLITHIUM Lithium-Ion Battery
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  • Due to federal regulations, this product can only be shipped within the continental US. Express delivery not available.


Delivers up to 2x more runtime, 20% more power and 2x more recharges than standard Lithium-Ion batteries. The M12 RedLithium 4.0 Ah XC Battery Pack features superior pack construction, electronics and performance to deliver more work per charge and more work over pack life than any battery on the market. It offers 4.0 amp-hours of runtime. With Milwaukee durability built into each pack, this battery runs cooler and performs in climates below 0 degrees Fahrenheit. Its compact design fits in tight work spaces and reduces user fatigue. Managed by Milwaukee's exclusive REDLINK intelligence, the battery features overload protection to prevent you from damaging your cordless power tools in heavy-duty situations, while the discharge protection prevents cell damage. The temperature management system and individual cell monitoring help maximize battery life. Switch to the RedLithium 4.0 Ah Compact Battery Pack to instantly upgrade the runtime and durability of your Milwaukee M12 cordless tools.
  • 4.0 Ah offers extended runtime.
  • High current discharge offers increased power and performance
  • Rubber over-molded base protects delicate surfaces from marring
  • Sturdy base allows M12 tools to easily stand
  • Compact and lightweight - smaller and lighter than Ni-Cd batteries
  • Best-in-class construction offers longer lasting performance and durability
  • All-weather performance delivers fade-free power in extreme jobsite conditions
  • On-board fuel gauge displays remaining runtime for less downtime on the job
  • Powers most Milwaukee M12 cordless power tools
  • M12 XC 12V 4 Ah RedLithium Lithium-Ion Battery - 48-11-2440


Series: M12
Battery Amp Hours: 4.0 Ah
Battery Style: Slide
Battery Type: Li-Ion
Compatible Models: Milwaukee M12 Cordless Tools
Voltage: 12V



4.8 / 5.0
58 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Yes, I would recommend this to a friend (54)
No, I would not recommend this to a friend (2)
Powerful (44)
Easy To Use (43)
Battery Longevity (if applicable) (1)
Heavy (2)
Best Uses
Home Repair (29)
Frequent Use (1)
Heavy Duty Requirements (1)
Large Projects (1)
Yes, I would recommend this to a friend
Fast shipping, just what I needed
I'm a contractor and battery life and power is important to getting work done. These help my crew do more continuous work without the hassle of recharging so much.
February 7, 2014
Yes, I would recommend this to a friend
great battery
works well with jacket, keep on hi setting all day.
February 5, 2014
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Home Repair
Milwaukee batteries are quality products
These batteries are well made and provide lots of power and long runtime !
March 5, 2015
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Home Repair
great free gift from CPO
September 23, 2015
Yes, I would recommend this to a friend
Easy To Use
Best Uses
Home Repair
I would recommend and purchase again.
Cuts nice and straight. Lightweight and pretty powerful. Use it outside and in the garage building projects like sawhorses, drill press stand and shelving. I love it, no cord!!
May 4, 2016
No, I would not recommend this to a friend
Extended battery pack
Upon arrival I tried to charge the unit. In both of my chargers it showed as a defective pack. Returned to CPO for refund. Will try new instead of recon.
February 5, 2014
Yes, I would recommend this to a friend
Easy To Use
Battery Longevity (if applicable)
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Small Projects
Home Repair
Great Battery
If you have the M12 Oscillating tool or the Fuel 5 3/8" M12 circ saw, these batteries are a must. In a drill or impact driver they will last for all day of average usage. They recharge fairly quickly. I have 4 of them and they are great.
February 27, 2017
1 year ago
Describe Yourself:
Avid Do-it-Yourselfer
Yes, I would recommend this to a friend
Battery life is great and last a long ti
Battery came free with the purchase of the sub compact band saw. Better that the one it came with.
January 19, 2014
Yes, I would recommend this to a friend
12M Milwauke 12 volt drill battery
Put it on my drill and it showed a full charge-has yet to show any signs of running down-a powerhouse
February 18, 2014
Yes, I would recommend this to a friend
Great refurbished Battery
Great buy.
April 2, 2014

Questions & Answers

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Browse 15 questions Browse 15 questions and 31 answers
Can u use this battery on the heated gear (hoodies,jackets,or hand warmers)
Meechie on Jan 7, 2016
BEST ANSWER: You sure can, but only on 2014 and newer model heated jackets. These newer jackets have an additional zipper on the pocket that allows it to be extended in order to accommodate a larger battery (the 4.0ah XC 12v battery and also the 18v compact 2.0ah.) Just keep in mind that this 4.0ah 12v battery's shape makes it a lot more uncomfortable and cumbersome in the jacket than the 2.0ah or the compact 18v since it has a squared corners. So if you absolutely need the additional runtime, I would recommend the 18v 2.0 red lithium battery with the 18v power source accessory (it's just a USB 12v jacket power adapter) over this 12v 4.0ah XC just for comfort's sake.
Will this battery work in any m12drills?
A shopper on Jan 14, 2017
BEST ANSWER: Yes it will work with any M12 tool. I particularly like that the drills and impact drivers "stand up" when these batteries are attached.
does this battery work in my m12 heated vest?
George V on Feb 13, 2017
BEST ANSWER: Yes, the 4ah battery can be used with any of the M12 heated gear
Is this battery TSA compatible (M12 XC)
Rick on May 1, 2016
BEST ANSWER: TSA compatible? Do you mean allowed to take on a plane with you?
Yes, you can get on a plane with that battery. It's only a 48 watt hour battery (12V x 4Ah). All such batteries need to be in carry on luggage, not checked in baggage. Page 2 of the link below specifically shows a portable drill battery (albeit a DeWalt) as an example. Tape over the terminals to protect for short circuiting - or appear to protect from short circuiting. I wouldn't want my equipment confiscated just because someones opinion on what 'protected from short circuiting' is.
From the FAA website:
Spare lithium metal and lithium ion/polymer batteries are prohibited in checked baggage—this includes external battery packs. “Checked baggage” includes bags checked at the gate or planeside.
Hope that helps!
Joe on Nov 12, 2015
BEST ANSWER: The best battery depends on the individual. The longest running battery is the M12 4ah battery however that battery is bulky and may feel uncomfortable. The 2 ah battery is slim and considered more ideal given its size but it has 45% less run time than the 4 ah battery
What's the qualified tool to get battery for free?
Joshua B on Apr 28, 2017
BEST ANSWER:,default,sc.html
Where can I buy the battery and charger for my heated jacket?
Fonzy on Oct 29, 2016
BEST ANSWER:,default,pd.html
Is this a charger too?
A shopper on Oct 12, 2016
BEST ANSWER: The Milwaukee 48-11-2440 is a 4 ah battery only.
Does this battery unit come with a charger?
Gary on Nov 30, 2015
BEST ANSWER: No, this listing does not include a charger
can i use this battery in the heated jacket
kelly on Nov 18, 2015
BEST ANSWER: Yes, as long as the jacket calls for 12 volt Redlithium battery
Do the chargers that came with my original combo pack that were not lithium,charge the newer red-line batteries weather it is 3ah or 4ah?
toolnut on Nov 30, 2014
BEST ANSWER: No,your charger has to be able to charge the newer Lithium Ion batteries.
I have a Milwaukee drill 3/8" Catalogue No. 0401-1 and need a battery for it. Battery numbers for the 12 v. drill are 48-11-0140 and 48-11-0080. Does Milwaukee still make these batteries?
gofish on Oct 4, 2014
BEST ANSWER: No, but there are many retailers that still have them for sale
can i use a m12 xc 12v 4ah redlithium ion battery in a m12 heated jacket.
dwi on Jan 10, 2014
BEST ANSWER: It is recommended that the jacket used the 48-11-2401 M12 12V 1.5 Compact Battery/
does this battery fit my Milwaukee M12 radio(2590-20)
brett on Aug 20, 2013
BEST ANSWER: Yes, you can use and Milwaukee M12 Lithium-Ion battery with this radio.
which batteries are compatable with the 2450-20 12V impact driver
DANNY on Jun 18, 2013
BEST ANSWER: Any M12 Milwaukee battery can be used. Model numbers 48-11-2401, 48-11-2420 or 48-11-2440.