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REDLITHIUM™ batteries last longer, think faster and work harder than all other professional lithium-ion batteries. Our exclusive integration of chemistry, pack design and circuitry come together for superior output in the harshest environments. REDLITHIUM™ batteries deliver more work over the course of your day and over life of the battery.

Now Available


M18™ REDLITHIUM™ HIGH OUTPUT™ Batteries deliver more power and run cooler, while providing more run-time and faster charging vs. their M18™ REDLITHIUM™ counterparts. This allows users to experience faster application speeds and greater productivity in all three segments of M18™ Batteries (CP, XC, and HD), under one fully compatible system.

50% More

50% Cooler


Powerful, with less weight and smaller size for reduced user fatigue and a better fit in tight spaces. Perfect for overhead work, and lightweight tools with users desiring maximum power and runtime in a compact size.


More power and run-time versus compact batteries, with a great balance of performance and weight for a wide variety of tools and applications.


The most power and run-time of all batteries. True corded HD or gas replacement, with ideal performance for high demand applications and stationary tools.

RedLithium Advantages

Milwaukee® was the first to introduce lithium-ion cell technology in the industry and has continued to lead cell advancements, providing users with more power, run-time, and life.

All developmental testing is done in our world class battery lab to ensure optimum performance and life under the most demanding jobsite conditions.

By partnering with the world leaders in cell technology, we provide the best solutions for our systems and users.

As a solutions provider, our design always focuses around the user - REDLITHIUM™ battery packs are no exception.

REDLITHIUM™ batteries are best protected against harsh jobsite conditions through unique, patented designs.

The result are packs that works harder and lasts longer, protecting our end users’ investment.


Fully Enclosed Cell Carrier
Full enclosure protects cells and provides a strong structure delivering maximum durability

Rubber Overmold
Protects cells and pack during drops and provides maximum life


Battery Fuel Gauge
Displays remaining run-time

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


Temp Control Cell Frame
Large surface area pulls heat away from the cells, allowing the pack to run cool under the heaviest applications


Latch Cover
Prevents water from entering pack through latch buttons

Water Protection Barrier
Routes water away from the electronics & out of the battery through integrated weep holes

Electronic Coating
Protects the electronics from water and condensation

Milwaukee® was the first to introduce a fully intelligent system in the industry by integrating electronics in the battery, tool, and charger. This investment in technology has provided M18™ and M12™ systems that are fully forward and backward compatible.

The sophisticated battery electronics monitor individual cells, provide temperature and overload protections, and allow optimized performance based on the tool and pack combination.

M18 System Compatibility

Milwaukee® is committed to improving productivity by providing performance-driven and trade-focused solutions so users can perform an entire day’s work on one battery system. The M18 System includes 175+ tools, and is a true testament to Milwaukee’s focus on investing in technology to deliver breakthrough solutions for our users.

*Due to the physical size increase of the M18™ REDLITHIUM™ HIGH OUTPUT™ HD12.0, it does not fit the following tools prior to a 6/1/2018 manufacturing date without applicable service part: 2787-20, 2788-20, 2771-20, 2122-20, 2130-20, 2135-20, 2361-20, 2145-20, 2146-20, 2360-20. Milwaukee is committed to protecting end user’s investments, offering FREE service upgrades for the listed products to any customer that purchases a HIGH OUTPUT™ HD12.0 battery pack ( starting summer 2018 you will be able to visit e-Service to request your service part).


Charges up to
4X faster