Model#: MILN48-11-1812

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Milwaukee 48-11-1812 M18 REDLITHIUM HIGH OUTPUT HD12.0 Battery Pack

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  • Milwaukee 48-11-1812 M18 REDLITHIUM HIGH OUTPUT HD12.0 Battery Pack
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In Stock Delivered by Tue., Feb.26

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Product Overview


The M18 REDLITHIUM HIGH OUTPUT HD12.0 Battery Pack provides 50ore power and runs 50ooler vs M18 REDLITHIUM HD battery packs. The massive increase in power elevates the performance of the entire M18 system and drives the next breakthrough in M18 FUEL, generating the power of 15A corded product. It delivers fade free power and runs substantially cooler through heavy applications, allowing tradesmen to push their cordless tools harder and longer than ever before.The M18 REDLITHIUM HIGH OUTPUT HD12.0 is the best performing cold weather pack ever made, providing increased power in extreme cold weather conditions (below 0 degrees F / -18 degrees C). It provides the most work per charge of any professional power tool battery in the industry, driving full corded replacement on the jobsite. The REDLITHIUM HIGH OUTPUT HO12.0 battery is fully compatible with 150 M18 solutions.
  • REDLINK Intelligence: Provides optimized performance and overload protection using total system communication between tool, battery and charger
  • Best-in-class construction: Offers long-lasting performance and the best protection against jobsite conditions
  • Fuel gauge onboard: Displays remaining run-time
  • Versatility: Powers more than 150 M18 cordless solutions
  • M18 REDLITHIUM HIGH OUTPUT HD12.0 Battery Pack - 48-11-1812


Series: M18
Cordless: Yes
Battery Style: Slide
Battery Type: Li-Ion
Compatible Tools: All M18 Tools
Output (Watt Hours): 216Wh
Warranty: 3 Year Limited Warranty
Amp Hours: 12.0Ah
Battery System: M18
Voltage: 18V



4.7 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (4)
Battery Longevity (if applicable) (2)
Powerful (1)
Value (1)
Best Uses
Heavy Duty Requirements (2)
Frequent Use (1)
Large Projects (1)
Jobsite (1)
Yes, I would recommend this to a friend
Wishing claims were ture
Works great full charge, doesn't make the claims of 150 cuts on chainsaw, falls well short, does good on 7 1/4" circular saw
February 13, 2019
1 month ago
Describe Yourself:
I love it is really good and lasts longer
I really like this battery, it’s little heavy for me but is okay
February 11, 2019
Yes, I would recommend this to a friend
Heavy but last all day. It’s worth it
February 6, 2019
1 month ago
Describe Yourself:
I have bought this product again.
This battery is a beast ! It lasts forever it seems. I have at least one of each type saw, that Milwaukee makes in the 18V Fuel series. I use the new 12.0 in them all, and cut out the mid day battery swap. Not to mention it’s really a must have for the table and miter saw. One cane with a 9.0 which was ok ..12.0 is better.
January 31, 2019
Originally posted at
Amazing run time.
These 12.0 High output batteries make your tools run longer. That’s obvious. They also make your tools more powerful under heavy loads. Bigger hammer drills and saws definitely run better than the competitors on these packs. I have 7 and want more.
January 30, 2019
Originally posted at
Grown folk tool
Use it at work with fuel 5" grinder. Works perfectly. Thinking about buying 7"/9" to see how it does but my guess is it will be great.
January 24, 2019
Originally posted at
Very Impressive Power & Battery Life
I use Milwaukee tools daily, with the majority being the M18 Line. The M18 HD12.0 Battery was a welcome addition to my arsenal, and it definitely has the power I was looking for. I was on a job recently where a homeowner was concerned about a dead tree on their property, and although I didn't have the chainsaw with me, I used my M18 Sawzall with the HD12.0 Battery. I was worried that my Sawzall was going to overheat because it's not the Fuel version, but it actually ran great while I cut the tree down, and trimmed it into smaller pieces. Overall, this took about an hour and a half, constantly cutting the tree in different places(It would have gone much faster if I had my rough tree trim blade on. Out of my M18 5.0's & HO9.0, I'm massively impressed with the HD12.0. Some tools do take more of a toll on the battery life than others, but that's what the speed charger is for. If you don't have one, it will change your battery charging life. I would highly recommend this battery. GET IT! By the way, when I finished cutting the tree down the HD12.0 Still had 2 bars on the battery!
December 26, 2018
Originally posted at
Yes, I would recommend this to a friend
Battery Longevity (if applicable)
Best Uses
Heavy Duty Requirements
One of the bateries made a squealingtype noise on its first charge.
I hope that it is nothing. Time will tell.
November 28, 2018
Describe Yourself:
Avid Do-it-Yourselfer
Yes, I would recommend this to a friend
Battery Longevity (if applicable)
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Great for plumbers drill
Very long lasting battery, great for my Plumbing work.
August 28, 2018
6 months ago
Describe Yourself:
A lot of Power! Lasts a long time.
This battery fits all my Milwaukee tools: leaf blower, chainsaw, LED project light, reciprocating saw, and drill. It charges up in a couple of hours, and it lasts for days, swapping it out among my tools. It is great to have this extra capacity!
August 3, 2018
Originally posted at

Questions & Answers

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Browse 4 questions Browse 4 questions and 5 answers
How long does this carge last?
sheran g on Aug 5, 2018
BEST ANSWER: I’m a Electrican and drill holes for a 3000 sq ft house in 4 hours and still had 1/2 life of battery to go
Is it compatible with my Milwaukee circular saw and surge impact driver?
Mark H on Nov 7, 2018
BEST ANSWER: If they are part of the m18 platform, then yes. I suspect they are.
What is the weight of the battery compared to the 9ah?
Kyle V on Aug 21, 2018
BEST ANSWER: The weight of the battery model 48-11-1812 is 3.70 lbs.
Will it charge on any charger?
CWMJR on Aug 17, 2018
BEST ANSWER: We recommend the Milwaukee 48-59-1808 M12/M18 Lithium-Ion Battery Rapid Charger.