Model # 48-11-2440

Internet #203806662

Store SKU #1000000720

Milwaukee M12 12-Volt Lithium-Ion XC 4 Ah Extended Capacity Battery
0045242293278

Milwaukee

M12 12-Volt Lithium-Ion XC 4 Ah Extended Capacity Battery

  • Battery operates down to 0 degrees Fahrenheit.
  • REDLINK Intelligence prevents overload and protects cells
  • Part of the M12 System, featuring over 70 tools
$79.00 /each

Frequently Bought Together

Product Overview

Compatible with all Milwaukee M12 cordless tools and instruments, the M12 REDLITHIUM XC extended-capacity battery delivers 4 Ah (48 watt-hour) of run time-even in sub-zero temperatures. Each 12 volt lithium-ion battery is laden with new-age REDLINK circuitry engineered to prevent overloads and protect against cell-damaging discharge. Revolutionary cell monitoring and temperature regulation prolong this battery's operation and life expectancy, meaning fewer work interruptions and more recharges than ever. Professionals depend on heavy-duty, long-lasting performance and Milwaukee delivers with this 12 volt battery pack.

  • Compatible with all Milwaukee M12 lithium-ion tools and chargers (sold separately)
  • Fuel gauge on tool indicates when to recharge
  • Recharges in 30-75 minutes
  • Resists drainage when not in use
  • Flat-bottom base allows tools to stand upright
  • 3-year limited warranty
  • Click here for more information on Electronic Recycling Programs

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Customer Questions & Answers

Is the charger included in this price, or must it be purchased separately?

Is the charger included in this price, or must it be purchased separately?
Asked by: Dan
The charger is sold separately. If you don't have any of the M12 line, I'd suggest buying a combo kit with whatever tool you're interested in - that way will be much cheaper than buying the bare tool, the batteries, and charger all separately. Any Milwaukee product numbers ending in a -21 or -22 should have one or two batteries included, respectively. The ending letters "XC" or "CT" refer to extra capacity type batteries, or compact style batteries.
Answered by: Doresoom
Date published: 2017-02-01

Does the XC battery allow tools to operate at higher torque?

I asked a similar question previously and I believe my meaning was misunderstood. Obviously a 4.0 Ah battery will have twice the energy storage capacity of a 2.0 Ah battery. I'm interested in knowing if the XC batteries can discharge more electrical current at a higher rate than the compact batteries, resulting in a higher maximum power achieved for the tool using it. This should be possible because the XC batteries have more individual cells connected in parallel, and therefore can safely discharge current at a higher rate without overheating. So if I buy a Milwaukee tool like the new M12 Circular saw and only have M12 2.0 Ah compact batteries, will the torque and power output be less than if I bought an M12 4.0 Ah XC battery? If this is the case, are the electronics regulating current draw located in the tool or in the battery? Are there certain M12 tools that utilize this capability, and some that don't? Sorry for writing an essay with multiple questions, but all these factors can impact my buying decisions and how I'll use my tools, and I can't find a definitive answer anywhere.
Asked by: Doresoom
The xc batteries does enhance performance the person who said that it doesn't don't own any m12 because I have m12 sawzall, flashlight, impact, hammer drill, screw gun, edge tool, an I own 8 basic m12 batteries an 2xc m12 battery I hear an feel the difference Im bout to purchase the 4.0 for my jacket because xc only last 4/5HRS I Need 8/10HRS btw im a Milwaukee only buyer I own m18fuel GREAT TOOLS FOR ME(electrician) fav color RED so best of both worlds lol
Answered by: rick
Date published: 2016-12-15

I just bought a hackzall with a rounded base battery (2.0 ah?) and a charger. My question is, is XC 4 AH compatible with my charger & hackzall?

Asked by: Santi460
Yes, with both. This and any Milwaukee M12 battery can be used in any tool in the M12 lineup, and charged in any of the Milwaukee M12 chargers.
Answered by: Grogan14
Date published: 2017-02-17

Is the current output higher than the 2 Ah compact version?

I've heard that the XC batteries can supply more power to Milwaukee cordless tools because they have more cells that can discharge in parallel. Is this true, or is it something someone made up? It seems to be possible in theory, but I wanted to know if the Milwaukee tools are sophisticated enough to recognize the battery type and take advantage of the extra power output available.
Asked by: Doresoom
Yes, the two sets of cells in parallel allow for more current to discharge without the battery heating up as quickly. The M12 and M18 FUEL lines of tools all take advantage of this design feature for increased performance.
Answered by: Doresoom
Date published: 2017-02-01
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Customer Reviews

M12 12-Volt Lithium-Ion XC 4 Ah Extended Capacity Battery is rated 4.7 out of 5 by 34.
Rated 5 out of 5 by from Long lasting battery I have a couple of these for a drill, saw and multi tool. Very good battery life. It will power a tool full speed right to the very end of the charge unlike a NiCad battery which just gets slower and slower as it loses charge. it charges very fast - maybe 15 minutes or so. I just wish power tool manufacturers would standardize their battery size and connections so you can use a battery from one brand of tool with another brand. Sort of like the Alkaline batteries we have now, D, C, AA and AAA. These companies make proprietary batteries so you are tied in with the same brand for years. It would be nice if a consumer could mix up their tool collection a little.
Date published: 2016-10-12
Rated 5 out of 5 by from Transforms all M12 tools in an awesome way! For M12 tools that draw a lot of power (Hackzall, multi-tool, impact driver) or simply multi-hour jobs, these batteries are the way to go, especially if you get them on sale. Legit 3-4 times the run time in a drill. I did three small assembling jobs for cheap furniture in a row and my brushed drill was still reading fully charged. In my Hackzall, it's a must-have. The normal 1.5 ah batteries last about 20 mins, while this can get an hour of cutting time. Great product!
Date published: 2016-11-19
Rated 4 out of 5 by from Great performance The performance of the large 4.o batteries in undeniable. Much more power and runtime than the 2.0 redlithium batteries. However, the only problem that I have found is the build qualty. I have noticed that around the glue joints at the seams of the housing are very susceptible to splitting. On mine, after a small tumble the entire black bottom shattered and I had to superglue and tape back together. A larger issue arouse when the tip of the battery neck split which I also had to fix. This is a problem because now the neck of battery is at an angle, which makes it very difficult to place the battery in the charger.
Date published: 2014-03-29
Rated 3 out of 5 by from Batteries is good and the problem is that... Batteries is good and the problem is that warranty mill walkie don't want to exchange because it has a little crack on the housing.. I told Milwaukee that this is a power toll not a toy
Date published: 2017-02-14
Rated 5 out of 5 by from Charged reasonably quick. Seems to hold good charge... Charged reasonably quick. Seems to hold good charge
Date published: 2017-01-24
Rated 5 out of 5 by from Extra battery life, just what you need for all day... Extra battery life, just what you need for all day
Date published: 2017-02-01
Rated 5 out of 5 by from excellent excellent
Date published: 2016-12-20
Rated 5 out of 5 by from Amazing Battery The M12 Redlithium batteries are pretty amazing, and these 4.0Ah XC batteries seem to pack an extra punch in addition to their longer run time. They charge very quickly too. I had been using the standard 1.5Ah compact batteries with my M12 tool lineup, and finally got a hold of one of these 4.0Ah extra capacity batteries. The big boost in run time was the obvious bonus, but since I've heard that the XC batteries can supply certain Milwaukee tools with more power, I thought I'd run some experiments to verify the speculation. The idea makes sense in theory: more cells connected in parallel allow for more current to be discharged without the tool overheating as quickly. More current draw equals more power. The first test I ran was with my M12 5-3/8" circular saw. I took a sheet of 1/2" MDF, and purposefully wavered my cut line while I was ripping it. I stalled the tool while using the M12 compact battery, but only bogged it down while using the M12 extra capacity battery. Keep in mind that this was a very unscientific test, since I had no way of measuring the amount of torque I was applying to the handle in my attempts to get the blade to bind. The second test I ran was with my M12 1/4" FUEL impact driver. I drove a 1/4"x4" lag bolts into the end grain of a 2x4 and timed how long it took each run with the different batteries. I attempted to just let the weight of the tool drive the lag bolts, rather than pushing down on it, since I figured it would be more consistent. The XC batteries are around twice the weight of the CT ones, so that may have played into the driving speeds a minimal amount. I repeated the test four times for each battery type, and ended up with an average of 4.3 seconds for the XC battery, and 5.2 seconds for the CT battery. So both my "tests" came out in favor of the conclusion that the XC batteries supply a bit more power to the M12 tools (at least the FUEL versions). My experimental results are backed up by referencing maximum torque specifications listed on XC kits vs CT kits for the otherwise same product number tools. The extra capacity kits generally list 8-12% more torque than the compact ones. Examples include the M12 2403 drill/driver, and the M18 2604 impact hammer. Note that both of those are FUEL models, so that may play into which tools utilize the extra current output capacity.
Date published: 2015-04-27
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