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Model #48-11-1840

Store SKU #465360

M18 18-Volt 4.0 Ah Lithium-Ion XC Extended Capacity Battery Pack

  • Compatible With All M18 Power Tools
  • Fuel gauge onboard: Displays remaining runtime
  • Fully compatible with the M18 system, featuring over 200+ tools
  • See More Details

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Product Overview

M18 REDLITHIUM Battery Guide

M18 REDLITHIUM Batteries

Find the best M18 REDLITHIUM Battery to fit your needs.

Milwaukee 18 volt batteries offer more power, more runtime and longer battery life.

More Power, Runtime, and Battery Life

M18 REDLITHIUM Batteries are available in Compact, Extended Capacity, and High Demand

The Milwaukee M18 System offers over 200 cordless tools on one battery platform.

System Compatibility

All M18 Tools fit M18 Batteries

Four Milwaukee tools utilizing M18 REDLITHIUM HIGH OUTPUT Batteries on various jobsites

M18 REDLITHIUM HIGH OUTPUT Batteries

Deliver more power and run cooler, while providing more run-time and faster charging

Milwaukee M18 REDLITHIUM CP and HIGH OUTPUT CP batteries are perfect for light demand applications.

M18 CP Batteries

M18 REDLITHIUM HIGH OUTPUT CP Batteries provide increased performance and runtime for M18 tools

M18 REDLITHIUM High Demand and HIGH OUTPUT HD batteries are perfect for heavy demand applications.

M18 XC Batteries

M18 REDLITHIUM HIGH OUTPUT HD Batteries provide increased performance and runtime for M18 tools

Graphic of all the parts of the REDLITHIUM Battery Pack

Advanced Lithium-Ion Technology

Last longer, think faster, and work harder than all other professional Lithium-Ion batteries.

Graphic of all the parts of the REDLITHIUM Battery Pack

Advanced Lithium-Ion Technology

Last longer, think faster, and work harder than all other professional Lithium-Ion batteries.

Two Milwaukee REDLITHIUM battery cells on white background

Lithium-Ion Cell Technology

Milwaukee was the first to introduce cell technology - providing users with more power, run-time, and life.

Internal view of M18 REDLITHIUM Battery Pack with three rows of five battery cells

M18 REDLITHIUM Battery Pack Design

Protects against harsh jobsite conditions through unique, patented designs.

Milwaukee REDLITHIUM Battery's Microchip on a gray background

Milwaukee Battery Electronics

Integrated electronics monitor individual cells, provide temperature and overload protection and optimize performance

M18 REDLITHIUM battery charging on a Milwaukee dual voltage charger in tool storage chest.

Intelligent Charging

Protects the pack in abusive situations, provides optimum performance and monitors cells for maximum life

Milwaukee protects your investment by backing all their M18 Batteries with warranties.

Battery Warranties

HD and XC Batteries = 3 Year Warranty. CP Batteries = 2 Year Warranty.

Compatible with all Milwaukee M18 cordless tools, the M18 REDLITHIUM XC extended-capacity battery delivers 4 Ah (72 watt-hour) of run time-even in sub-zero temperatures. Each 18 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 18 volt battery pack.
  • Compatible with all Milwaukee M18 tools and chargers (sold separately)
  • Resists drainage when not in use
  • Built-in charge meter
  • Durably constructed with welded frame and rubberized vibration/impact protector
  • Recharges in 60-minutes or less
  • 3-year limited warranty
  • Includes: one 48-11-1840 M18 REDLITHIUM XC 4.0 extended
  • Best in class construction: integrated weld frame, cell separator, impact and vibration protective rubber
  • Versatility: powers more than 40 Milwaukee M18 cordless power tools
  • All-weather performance: delivers fade-free power in extreme jobsite conditions
  • 3-year warranty
  • Compatible with all M18 chargers
  • Shop All Milwaukee Tools






  • Click here for more information on Electronic Recycling Programs

Info & Guides

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M18 REDLITHIUM Battery Guide

M18 REDLITHIUM Batteries

Find the best M18 REDLITHIUM Battery to fit your needs.

Milwaukee 18 volt batteries offer more power, more runtime and longer battery life.

More Power, Runtime, and Battery Life

M18 REDLITHIUM Batteries are available in Compact, Extended Capacity, and High Demand

The Milwaukee M18 System offers over 200 cordless tools on one battery platform.

System Compatibility

All M18 Tools fit M18 Batteries

Four Milwaukee tools utilizing M18 REDLITHIUM HIGH OUTPUT Batteries on various jobsites

M18 REDLITHIUM HIGH OUTPUT Batteries

Deliver more power and run cooler, while providing more run-time and faster charging

Milwaukee M18 REDLITHIUM CP and HIGH OUTPUT CP batteries are perfect for light demand applications.

M18 CP Batteries

M18 REDLITHIUM HIGH OUTPUT CP Batteries provide increased performance and runtime for M18 tools

M18 REDLITHIUM High Demand and HIGH OUTPUT HD batteries are perfect for heavy demand applications.

M18 XC Batteries

M18 REDLITHIUM HIGH OUTPUT HD Batteries provide increased performance and runtime for M18 tools

Graphic of all the parts of the REDLITHIUM Battery Pack

Advanced Lithium-Ion Technology

Last longer, think faster, and work harder than all other professional Lithium-Ion batteries.

Graphic of all the parts of the REDLITHIUM Battery Pack

Advanced Lithium-Ion Technology

Last longer, think faster, and work harder than all other professional Lithium-Ion batteries.

Two Milwaukee REDLITHIUM battery cells on white background

Lithium-Ion Cell Technology

Milwaukee was the first to introduce cell technology - providing users with more power, run-time, and life.

Internal view of M18 REDLITHIUM Battery Pack with three rows of five battery cells

M18 REDLITHIUM Battery Pack Design

Protects against harsh jobsite conditions through unique, patented designs.

Milwaukee REDLITHIUM Battery's Microchip on a gray background

Milwaukee Battery Electronics

Integrated electronics monitor individual cells, provide temperature and overload protection and optimize performance

M18 REDLITHIUM battery charging on a Milwaukee dual voltage charger in tool storage chest.

Intelligent Charging

Protects the pack in abusive situations, provides optimum performance and monitors cells for maximum life

Milwaukee protects your investment by backing all their M18 Batteries with warranties.

Battery Warranties

HD and XC Batteries = 3 Year Warranty. CP Batteries = 2 Year Warranty.

Specifications

Dimensions

Product Height (in.)
6.115
Product Length (in.)
4.5 in
Product Width (in.)
6.809

Details

Battery Amp Hours
4 Ah
Battery Amp Hours
4.0
Battery Power Type
Lithium Ion
Charge time (min.)
40
Color Family
Red
Number of Total Batteries Included
1
Power Tool Accessory Type
Battery
Power Tool Features
No Additional Features
Rechargeable
Yes
Returnable
90-Day
Tools Product Type
Power Tool
Voltage (volts)
18

Questions & Answers

191Questions13Answers

I have a nine ah battery that says it’s fully charged and then gives me about five minutes of running time.

Asked by AMP April 27, 2021
1
Answer

Battery is a goner, the 9s have had issues so much that I think Milwaukee has dedicated service line for handling the warranty on them.

How many batteries do you get for $149?

Asked by beenthere March 30, 2021
2
Answers

you get one, not worth it it go for the high output 8HR same wt more power especially if using on a saw

M18 redlithium xc 5.0 Does it need to be charged? I dont have a charger

Asked by Juliana March 26, 2021
1
Answer

Hello Juliana! Our M18 18-Volt 5.0 Ah Lithium-Ion XC Extended Capacity Battery Pack (48-11-1850) will come as just the battery. However, if you are in need of a charger, we offer our M18 18-Volt Lithium-Ion XC Starter Kit with (1) 5.0Ah Battery and Charger (48-59-1850) or M12 and M18 12-Volt/18-Volt Lithium-Ion Multi-Voltage Rapid Battery Charger (48-59-1808).

Which battery is better the xc or the xc high output ?

Asked by Mike March 16, 2021
2
Answers

Hi Mike, XC is a very good battery, but the XC High Output is even better. High output for more power consuming tools. Hope this helps.

Is the high output batteries better than the XC batteries and why

Asked by Lamont February 2, 2021
0
Answers

battery power

Asked by unclebobpa January 23, 2021
0
Answers

Will the xc 5.0 batyery eork in the milw m18 brush cutter

Asked by Rc December 21, 2020
1
Answer

Hi there! You can use any M18 battery with any M18 product. However, you will typically get a longer run time when using a larger amp hour battery.

what is the weight of 1 battery

Asked by mike October 12, 2020
1
Answer

1.55 Lbs

Which battery and battery charger works with the 2656-20 1/4 chuck m18 18 volt impact drill?

Asked by Red October 11, 2020
2
Answers

All milwaukee battery charger 18 volts, 12 volts or dual are all compatible with all milwaukee.

I have a new m18 battery it will not take a charge. What should I do?

Asked by Reggie October 6, 2020
3
Answers

I would return it

M18 18-Volt 4.0 Ah Lithium-Ion XC Extended Capacity Battery Pack - page 2

Customer Reviews

  • 4.7
    out of 2,219 reviews
  • 89% recommend this product
Filter by:
Showing 1-10 of 2,219 reviews
Works great and lasts a long while.
Works great and lasts a long while.
by JD
10 people found this helpful
I have numerous sizes. This one is big enough for most jobs using my medium sized tools.
I have numerous sizes. This one is big enough for most jobs using my medium sized tools.
by thedogscar
10 people found this helpful
One of the batteries was bad from the start. Just took it to the Milwaukee store and they exchan...
One of the batteries was bad from the start. Just took it to the Milwaukee store and they exchanged it on the spot. No worries. Very happy.
by Thor
very disapointes
Purchased this at Home Depot and it lasted 10 days before it would not charge fully anymore. I tried to get a new replacment throigh The manufacturer and just kept getting the run around. I have lots of Mulwalkee products andwill not buy any more high output products.
by David
Response from Milwaukee ToolJan 2, 2020
Hello, this is Mackenzie with Milwaukee Tool. David, thank you for taking the time to review your Batteries. We’re sorry to hear that your experience with this product did not meet your expectations. We would like the opportunity to look into this, so please feel free to contact us directly at socialmedia@milwaukeetool.com if you would like further investigation into this matter. Look forward to gaining resolution on this for you. Thank You
3 people found this helpful
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Big orange sent us the 100 lumen older version light. Don't buy unless you can see it in person t...
Big orange sent us the 100 lumen older version light. Don't buy unless you can see it in person to verify it's the new model or it's substantially marked down. The new version of the M18 is a great add on if you already have an M18 charger and batteries. Power outages happen around here and we can keep this running for days with the M18 batteries and promised 24 hour plus run time with a 5.0 AH M18 battery. The new version puts out nice clean light, you can set it on a flattish surface or hang it, and you can adjust the direction of the light. It's a basic on or of no zoom, no hi and low setting, just a simple light that works. Nothing special about just a light that works with the M18 system. There are much better options like mag lights or head lamps that take replaceable batteries if you don't already have a charger and battery.
by senorflash
Response from Milwaukee ToolNov 11, 2019
We invite you to contact us at socialmedia@milwaukeetool.com so we may discuss your specific personal experience at Milwaukee Tool. Thank you. -Mackenzie
3 people found this helpful
Love Milwaukee and everything they're coming out with!...
Love Milwaukee and everything they're coming out with!
by Mitaraho
11 people found this helpful
A must have for the Milwaukee weed trimmer (2725-21HD). One battery isn't enough for larger prop...
A must have for the Milwaukee weed trimmer (2725-21HD). One battery isn't enough for larger properties, so having a second battery on hand is great. Took me about an hour to fully charge using rapid charger, and lasts about 30-40 minutes with my weed trimmer on high speed mode. The only drawback is the price for one of these high demand batteries.
by NeedMoreTools
Product arrived quickly and on time, the 9.0 battery has excellent strength to power my M18 compo...
Product arrived quickly and on time, the 9.0 battery has excellent strength to power my M18 compound miter saw.
by nick
Great product! I have been using Milwaukee products for 3 years now and haven’t have one problem ...
Great product! I have been using Milwaukee products for 3 years now and haven’t have one problem with them.
by Joe
8 people found this helpful
Showing 1-10 of 2,219 reviews