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Milwaukee Red Lithium 18V 4.0Ah Battery, Extended Runtime Pack for M18 Platform
Bosch 1600A002U5 18V 5.0Ah Battery
Individual Price
543.40Buy selected items separately
Bundle Price
Milwaukee Red Lithium 18V 4.0Ah Battery, Extended Runtime Pack for M18 Platform
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- The Milwaukee M18B4 REDLITHIUM is an 18V 4.0Ah battery pack. It offers longer runtime than compact packs while remaining manageable for daily site use.
Key Features
Frequently Bought Together
Everything you need in one click
Milwaukee Red Lithium 18V 4.0Ah Battery, Extended Runtime Pack for M18 Platform
Bosch 1600A002U5 18V 5.0Ah Battery
Individual Price
543.40Buy selected items separately
Bundle Price
Features & Benefits
4.0Ah Extended Runtime
Supports longer drilling, cutting and fastening sessions between charges.
REDLITHIUM Reliability
Maintains power output even as the battery discharges under heavy loads.
Rugged Construction
Reinforced housing and electronics resist vibration and jobsite abuse.
Integrated Fuel Gauge
Four‑LED indicator displays remaining charge at the press of a button.
Ideal for FUEL Tools
Great match for higher‑demand saws, grinders and impact wrenches.
Key Specifications
Custom Stock Status
Out Of Stock
Weight
0.70 kg
Color
Black
Quantity Unit
NOS
Model No
M18B4
Country Of Origin
USA
Brands
Milwaukee
Item Type
Lithium Battery
Battery Type
Li-ion
Voltage
18V
Power Source
None
Amps
4Ah
Usage
Construction and Carpentry, Woodworking, Metalworking, DIY Projects, Metal Fabrication, Renewable Energy Installation, Mining and Quarrying
Overall dimensions
17.3 X 8.3 X 15.5CM
EAN
4002395377244
Frequently Asked Questions
What exactly is the Milwaukee M18B4 RedLithium 18V 4Ah Li-Ion Battery and what does it power?
The Milwaukee M18B4 is an 18-volt rechargeable lithium-ion battery designed for Milwaukee M18 power tools. It has a 4Ah capacity and uses RedLithium technology to deliver longer run time and better performance for demanding tasks.
What are the key specifications of this battery (voltage, capacity, chemistry, technology)?
Key specs: 18V nominal voltage, 4Ah capacity, lithium-ion chemistry, Milwaukee RedLithium technology for enhanced runtime and efficiency. It’s built to fit Milwaukee’s M18 tool ecosystem and endure frequent use.
Is this battery compatible with all Milwaukee M18 tools?
It’s designed for the Milwaukee M18 platform and works with most M18 tools. Always verify your specific tool model and the battery compatibility notes for best results.
What is RedLithium technology and how does it affect performance?
RedLithium refers to Milwaukee’s high-energy-density Li-Ion cells. It delivers more consistent power and longer run time compared with standard Li-Ion cells, helping tools perform longer between charges.
How does runtime compare to 2Ah or 6Ah battery options?
A 4Ah battery generally offers more runtime than a 2Ah model, but less than a 6Ah model. The exact runtime depends on the tool, workload, and operating conditions.
How do I install the battery into my tool?
Power off the tool, align the battery contacts with the tool’s contacts, slide the battery in until you hear and feel a click indicating it’s locked in place. To remove, press the release tab and pull the battery out.
How should I charge and maintain the battery to maximize life?
Use the appropriate Milwaukee charger designed for M18 batteries. Avoid exposing the battery to extreme heat or moisture, and remove it from the charger once charging is complete if possible. Store in a cool, dry place when not in use.
What safety features does this battery include?
The battery includes built-in protection circuits for over-discharge, over-current, short-circuit, and temperature management to help prevent damage and enhance safety during use.
What are ideal uses or applications for a 4Ah capacity battery?
The 4Ah battery is well-suited for mid-to-high drain tasks like drilling, fastening, and cutting with many M18 tools. It provides a solid balance of runtime and weight for a wide range of jobs.
Is the 4Ah option a good value compared with other capacities on Fepy? Which should I choose?
If you want solid runtime without excessive weight or cost, the 4Ah option is a good mid-range choice. For longer run times, consider the 6Ah model; for lighter use or lighter tools, 2Ah may be more cost-effective. Compare these alternatives here: 2Ah model: https://fepy.com/product/milwaukee-m18b2-redlithium-18v-2ah-li-ion-battery and 6Ah model: https://fepy.com/product/milwaukee-m18b6-redlithium-18v-6ah-li-ion-battery
How can I identify a genuine Milwaukee battery on Fepy and avoid counterfeit listings?
Look for official Milwaukee branding on the product page and packaging, check the listing for an authorized seller tag, verify serial/lot numbers if provided, and compare features and images with official Milwaukee specifications to ensure you’re purchasing a genuine battery.
Frequently Asked Questions
The Milwaukee M18B4 is an 18-volt rechargeable lithium-ion battery designed for Milwaukee M18 power tools. It has a 4Ah capacity and uses RedLithium technology to deliver longer run time and better performance for demanding tasks.
Key specs: 18V nominal voltage, 4Ah capacity, lithium-ion chemistry, Milwaukee RedLithium technology for enhanced runtime and efficiency. It’s built to fit Milwaukee’s M18 tool ecosystem and endure frequent use.
It’s designed for the Milwaukee M18 platform and works with most M18 tools. Always verify your specific tool model and the battery compatibility notes for best results.
RedLithium refers to Milwaukee’s high-energy-density Li-Ion cells. It delivers more consistent power and longer run time compared with standard Li-Ion cells, helping tools perform longer between charges.
A 4Ah battery generally offers more runtime than a 2Ah model, but less than a 6Ah model. The exact runtime depends on the tool, workload, and operating conditions.
Power off the tool, align the battery contacts with the tool’s contacts, slide the battery in until you hear and feel a click indicating it’s locked in place. To remove, press the release tab and pull the battery out.
Use the appropriate Milwaukee charger designed for M18 batteries. Avoid exposing the battery to extreme heat or moisture, and remove it from the charger once charging is complete if possible. Store in a cool, dry place when not in use.
The battery includes built-in protection circuits for over-discharge, over-current, short-circuit, and temperature management to help prevent damage and enhance safety during use.
The 4Ah battery is well-suited for mid-to-high drain tasks like drilling, fastening, and cutting with many M18 tools. It provides a solid balance of runtime and weight for a wide range of jobs.
If you want solid runtime without excessive weight or cost, the 4Ah option is a good mid-range choice. For longer run times, consider the 6Ah model; for lighter use or lighter tools, 2Ah may be more cost-effective. Compare these alternatives here: 2Ah model: https://fepy.com/product/milwaukee-m18b2-redlithium-18v-2ah-li-ion-battery and 6Ah model: https://fepy.com/product/milwaukee-m18b6-redlithium-18v-6ah-li-ion-battery
Look for official Milwaukee branding on the product page and packaging, check the listing for an authorized seller tag, verify serial/lot numbers if provided, and compare features and images with official Milwaukee specifications to ensure you’re purchasing a genuine battery.
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