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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.

Coming Soon


The M18™ REDLITHIUM™ HIGH OUTPUT™ HD12.0 Battery Pack provides 50% more power and runs 50% cooler vs M18™ REDLITHIUM™ HD9.0 battery packs, allowing tradesmen to push their cordless tools harder and longer than ever before. The massive increase in power elevates the performance of the entire M18™ system and drives the next breakthrough in M18 FUEL™, delivering the power of 15A corded product. The REDLITHIUM™ HIGH OUTPUT™ HD12.0 battery is fully compatible with 150+ M18™ solutions.*
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50% More

50% Cooler

The Power To Cut Up To 750 Cuts in 2x4
The Power To Hawg Up To 550 7/8" Holes
The Power To Cut Up To 150 Cuts in 2X12
The Power To Rip Up To 600 LFT of 3/4" OSB

RedLithium Advantages

Cell Technology

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.

Pack Construction

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 durabilty

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

Robust Electronics

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.

RedLithium Optimization

M18 System Compatibility

m18 redlithium batteries are compatible with m18 tools

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).