- 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
Frequently Bought Together
Product Overview
M18 REDLITHIUM Batteries
Find the best M18 REDLITHIUM Battery to fit your needs.
More Power, Runtime, and Battery Life
M18 REDLITHIUM Batteries are available in Compact, Extended Capacity, and High Demand
System Compatibility
All M18 Tools fit M18 Batteries
M18 REDLITHIUM HIGH OUTPUT Batteries
Deliver more power and run cooler, while providing more run-time and faster charging
M18 CP Batteries
M18 REDLITHIUM HIGH OUTPUT CP Batteries provide increased performance and runtime for M18 tools
M18 XC Batteries
M18 REDLITHIUM HIGH OUTPUT HD Batteries provide increased performance and runtime for M18 tools
Advanced Lithium-Ion Technology
Last longer, think faster, and work harder than all other professional Lithium-Ion batteries.
Advanced Lithium-Ion Technology
Last longer, think faster, and work harder than all other professional Lithium-Ion batteries.
Lithium-Ion Cell Technology
Milwaukee was the first to introduce cell technology - providing users with more power, run-time, and life.
M18 REDLITHIUM Battery Pack Design
Protects against harsh jobsite conditions through unique, patented designs.
Milwaukee Battery Electronics
Integrated electronics monitor individual cells, provide temperature and overload protection and optimize performance
Intelligent Charging
Protects the pack in abusive situations, provides optimum performance and monitors cells for maximum life
Battery Warranties
HD and XC Batteries = 3 Year Warranty. CP Batteries = 2 Year Warranty.
- 1.5 Ah of run time
- Lithium-ion battery for longevity and fade-free power
- Equivalent run time with 40% less weight than an 18-Volt NiCd battery
- Onboard fuel gauge that shows the remaining run time, enabling you to adequately prepare for projects and have less downtime on the job
- REDLINK intelligence overload protection that prevents you from accidentally damaging your tools during heavy duty applications
- Temperature management system to keep the battery in an ideal range, helping extend its life
- Individual cell monitoring that ensures optimal charge and discharge
- Compact, lightweight design that fits into tight workspaces and reduces user fatigue
- All-weather performance that gives fade-free power in extreme job site conditions
- 2-year manufacturer warranty
- Charger sold separately
- Compatible with all M18 chargers
- Up to 40% more run-time
- Redlink intelligence: provides optimized performance and overload protection using total system communication between tool, battery and charger
- Versatility: powers more than 40 Milwaukee M18 cordless power tools
- All-weather performance: delivers fade-free power in extreme jobsite conditions
- Includes: (1) 48-11-1815 M18 red lithium-ion 18-Volt compact rechargeable battery
- Shop All Milwaukee Tools
- Click here for more information on Electronic Recycling Programs
Info & Guides
M18 REDLITHIUM Batteries
Find the best M18 REDLITHIUM Battery to fit your needs.
More Power, Runtime, and Battery Life
M18 REDLITHIUM Batteries are available in Compact, Extended Capacity, and High Demand
System Compatibility
All M18 Tools fit M18 Batteries
M18 REDLITHIUM HIGH OUTPUT Batteries
Deliver more power and run cooler, while providing more run-time and faster charging
M18 CP Batteries
M18 REDLITHIUM HIGH OUTPUT CP Batteries provide increased performance and runtime for M18 tools
M18 XC Batteries
M18 REDLITHIUM HIGH OUTPUT HD Batteries provide increased performance and runtime for M18 tools
Advanced Lithium-Ion Technology
Last longer, think faster, and work harder than all other professional Lithium-Ion batteries.
Advanced Lithium-Ion Technology
Last longer, think faster, and work harder than all other professional Lithium-Ion batteries.
Lithium-Ion Cell Technology
Milwaukee was the first to introduce cell technology - providing users with more power, run-time, and life.
M18 REDLITHIUM Battery Pack Design
Protects against harsh jobsite conditions through unique, patented designs.
Milwaukee Battery Electronics
Integrated electronics monitor individual cells, provide temperature and overload protection and optimize performance
Intelligent Charging
Protects the pack in abusive situations, provides optimum performance and monitors cells for maximum life
Battery Warranties
HD and XC Batteries = 3 Year Warranty. CP Batteries = 2 Year Warranty.
Specifications
Dimensions
Details
Questions & Answers
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, 2021Battery 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, 2021you 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, 2021Hello 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, 2021Hi 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, 2021battery power
Asked by unclebobpa January 23, 2021Will the xc 5.0 batyery eork in the milw m18 brush cutter
Asked by Rc December 21, 2020Hi 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, 20201.55 Lbs
Which battery and battery charger works with the 2656-20 1/4 chuck m18 18 volt impact drill?
Asked by Red October 11, 2020All 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, 2020I would return it
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