Model#: MILN48-11-1890

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Milwaukee 48-11-1890 M18 REDLITHIUM HIGH DEMAND 18V 9.0 Ah Lithium-Ion Battery Pack

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Product Overview


The M18 REDLITHIUM HIGH DEMAND 18V 9.0 Ah Lithium-Ion Battery Pack delivers up to five times more run-time, 35% more power, and runs 60% cooler than standard 18V Lithium-Ion batteries. The battery is best optimized for high draw products and sustained run-time applications, and it provides the next, large step towards full corded replacement when paired with the M18 system of solutions. It maintains full power and runs substantially cooler through heavy applications, allowing users to push their cordless tools harder and longer than ever before.
  • 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 durability
  • Fuel gauge onboard displays remaining runtime for less downtime on the job
  • All-weather performance delivers fade free power in extreme jobsite conditions
  • Versatility powers more than 100 Milwaukee M18 cordless power tools
  • M18 REDLITHIUM HIGH DEMAND 18V 9.0 Ah Lithium-Ion Battery Pack - 48-11-1890


Series: M18
Battery Amp Hours: 9.0 Ah
Battery Style: Slide
Battery Type: Li-Ion
Voltage: 18V



4.8 / 5.0
5 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Yes, I would recommend this to a friend (2)
Battery Longevity (if applicable) (2)
Easy To Use (1)
Powerful (1)
Value (1)
Best Uses
Frequent Use (2)
Large Projects (2)
Jobsite (2)
Heavy Duty Requirements (1)
Milwaukee's only three layer pack
Milwaukee's M18 1.5 & 2.0Ah battery packs have one set of five 3.6 volt cells in series that add up to 18.volts (one layer). The 3.0, 4.0, 5.0, & 6.0Ah battery packs have two sets of cells in series that are wired in parallel (two layers). The 9.0Ah battery pack has three sets of cells in series that are also wired in parallel (three layers), for a total of 15 cells. Adding layers increases capacity and decreases resistance; this generally allows the battery to run cooler. When compared to a single set of 3.0Ah cells, three layers of these cells gives you a 9.0Ah pack with 3 times the amperage capacity and flow rate, and 3 times the run time. I received this pack in a promotion with a rapid charger and the Fuel Circular Saw. If you have a high demand need, this pack is well worth buying.
February 26, 2017
Originally posted at
Milwaukee M18 High Demand 9.0 battery
I purchased the M18 high demand 9.0 battery at 11 am and used it between a grinder and saw zall just to see where it would be by the end of the day. When we finished up the day around 4:30 pm we had only used 1 bar. I could see it last all day on one tool without needing to be charged. It is bigger and heavier but well worth not having to stop 2 or 3 hours into a project to change out a battery.
December 3, 2016
Originally posted at
The 9.0 Ah Milwaukee RedLithium Battery/High Demand 18 volt.
An excellent product. It is like having 3 or 4 of the XC batteries in one.
December 10, 2016
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Battery Longevity (if applicable)
Best Uses
Frequent Use
Large Projects
life battery is really good charges in like 2 hours but it lasts a lot i would recomend to everyone to get one
June 29, 2017
2 months ago
Describe Yourself:
Yes, I would recommend this to a friend
Battery Longevity (if applicable)
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Small Projects
Home Repair
It's a champ
It's a champ. battery is great if you can't recharge for a while it'll last all day or longer depending on how much use.
May 15, 2017
3 months ago
Describe Yourself:

Questions & Answers

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Browse 3 questions Browse 3 questions and 4 answers
Can I use a regular 18 volt charger with this battery?
A shopper on Sep 30, 2016
BEST ANSWER: As per Milwaukee's youtube video, you can use your regular M18 charger to charge the new 6 Ah and 9Ah batteries. It will take a while due to the larger capacity. Milwaukee's new rapid charger is 40% faster, which may be handy for these larger batteries. It is also backward compatible with other existing M18 batteries. I've only seen the dual 18V/12V model, but read that single bay models are coming out if you don't use both 12v and 18v tools.
What is the weight of this battery?
A shopper on Oct 12, 2016
BEST ANSWER: The weight of the Milwaukee 48-11-1890 is 2.4lbs.
will the m18 high demand 9.0 work with heated coats ?
Gary E on Nov 9, 2016
BEST ANSWER: You can buy an M18 Power Port (49-24-2371) which WILL allow you to use the 9 Ah batteries with the heated gear.