The Milwaukee M18 RedLithium Extended Capacity 18V Lithium-Ion Battery works on the M18 cordless tool system. This battery will safely replace your M18 RedLithium 1.5 amp batteries.
Free Gift Card Details
- The promotion will be automatically applied on the Shopping Cart page.
- To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
- Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
- E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
- Free e-gift cards expire 10/01/26.
- Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
- Valid online and in participating retail stores.
- Limited-time offer. Subject to change without notice.
Milwaukee M18 RedLithium XC 4.0Ah Extended Capacity Battery, Model# 48-11-1840

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Click or Tap image to Zoom
This item is no longer available.
- 4.0 Amp hour, 72 Watt hour extended capacity battery
- Lithium-ion battery delivers long life and run time with fade-free power
- Battery fuel gauge displays remaining run time
- Milwaukee Redlink™ Intelligence
- Overload Protection prevents users from damaging their cordless power tool investment in abusive situations
See full description
Description
Key Specs
Reviews
Q & A
Accessories
Warranty
Compare
Product Summary
What's Included
- (1) M18 RedLithium XC 4.0 battery, Model# 48-11-1840
Downloads
Over 150 Tools, One Battery
- Focused on improving productivity for professionals in the trades, MILWAUKEE® offers more than 150 performance-driven solutions that are fully compatible with the M18™ family — the fastest growing 18V cordless system on the market.
- These tools stand alone, with patented technologies, innovative motors and advanced electronics powered by REDLITHIUM™ battery technology for unmatched run-time.
Performance-Driven M18™ Technology
- The MILWAUKEE® M18™ cordless system represents the ultimate synergy of professional grade power, light weight, extreme performance and superior ergonomics.
- Powered by REDLITHIUM™ battery technology for unmatched run-time, and coupled with patented technologies, innovative motors and advanced electronics, M18™ changes the game.
- Whether it's bringing cordless power to traditional corded products and manual activities or advances to fundamental tools, MILWAUKEE® drives to improve workplace productivity with user-driven innovations.
Shop With Confidence
- MILWAUKEE ® provides the best in heavy-duty electric power tools and accessories.
- Your purchase is protected with a 5-year limited warranty on cordless tools, a 2-year limited warranty on compact batteries, and a 3-year limited warranty on XC batteries.
- Shop in complete confidence, knowing that Northern Tool + Equipment protects your investment and is ready to provide you with the assistance and helpful resources you need.
Features + Benefits
- 4.0 Amp hour, 72 Watt hour extended capacity battery
- Lithium-ion battery delivers long life and run time with fade-free power
- Battery fuel gauge displays remaining run time
- Milwaukee Redlink™ Intelligence
- Overload Protection prevents users from damaging their cordless power tool investment in abusive situations
- Temperature Management System keeps battery in ideal temperature range to provide maximum life
- Individual Cell Monitoring ensures optimal charge and discharge for maximum life
- Discharge Protection prevents cell damage from over-discharge
- Best in class construction
- Integrated weld frame
- Cell separator
- Impact and vibration protective rubber
- For use with Milwaukee M18 cordless tools
Key Specs
| Attribute | Specification |
|---|---|
item# | 40520 |
Brand | Milwaukee |
Manufacturer's Warranty | 3 year limited warranty |
Ship Weight | 1.7 LB |
Volts | 18 |
| Attribute | Specification |
|---|---|
Battery Type | Lithium-ion |
Batteries (qty.) | 1 |
Battery Capacity | 4 A·h |
Product Type | Battery |
For Use With | Power Tools Regular |
Reviews
Questions & Answers
Questions
-
· 10 years ago
Can I safely use this battery on my tools that are a little older and came with m18 redlithium 1.5 amp batteries?
1 answer-
ProductExpert38· 10 years ago
Helpful?
-
-
· 10 years ago
What is the model # the best battery charger toget with/for the M18 RedLithium XC 4.0 battery ( model #48-11-1840
1 answer-
ProductExpert13· 10 years ago
There is not one charger that is better than another one. There are two chargers that only charge the M18 batteries. One charges a single battery and the other charges up to six batteries. These are listed below. Northern Tool also carries chargers that will charge both M12 and M18 batteries.
Helpful?
-
Accessories We Recommend
This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.
Warranty
Manufacturer's Warranty
3 year limited warranty
Compare with Most Popular in Power Tool Batteries + Chargers
See All Power Tool Batteries + Chargers
See All Milwaukee Power Tool Batteries + Chargers
Currently Viewing This Product
Shipping: Sold Out
Item # 114786
$209.99Shipping:
Free shipping (lower 48 states) - Factory shippedStore Pickup:
Item # 5876474
$249.00Shipping:
Factory shippedStore Pickup:
Item # 5876466
$209.00Shipping:
Factory shippedStore Pickup:
Specifications
18
20
60
20
Lithium-ion
Lithium-ion
Lithium-ion
Lithium-ion
1
1
1
1
4 A·h
5 A·h
6 A·h
5 A·h
Battery
-
Kit
Battery
Power Tools Regular
Power Tools Regular
Power Tools Regular
Power Tools Regular
-
1.6100 lb
3.4000 lb
1.5000 lb
-
4.8 x 3.1 x 2.8 in
11.563 x 5.313 x 3.938 in
3.5 x 3.1 x 5.25 in






