MILWAUKEE M18B5
18v Li-ion battery - 5.0Ah
- Overload protection
- Temperature management system
- Discharge protection
- Overload protection
- Temperature management system
- Discharge protection
- Overload protection
- Temperature management system
- Discharge protection
M18B5
Milwaukee M18 REDLITHIUM 5.0Ah battery pack. Designed for extended runtime, durability, and cold-weather performance across the full M18 cordless system.
Key Features
• Battery Type: REDLITHIUM-ION slide pack
• Capacity: 5.0Ah
• Voltage: 18V
• Runtime: Up to 2.5× longer than standard lithium-ion packs (tool/application dependent)
• Power Output: Up to 20% more power vs previous Milwaukee battery tech
• Cycle Life: Up to 2× more recharges
• Electronics: REDLINK digital overload protection prevents tool damage
• Cell Monitoring: Individual cell tracking for optimal charge/discharge
• Construction: Shock-resistant separators and metal frame for drop protection
• Water Management: Internal routing channels divert moisture from electronics
• Cold Weather Performance: Operates down to −20 °C without runtime loss
• Fuel Gauge: On-board LED indicator for charge status
Technical Specifications
• Battery Chemistry: Li-ion
• Charge Time (typical):
• M12–18 FC / SC / GBC4: ~59 min
• M12–18 AC / C: ~100 min
• Weight: 0.7 kg
• Warranty: 1 year standard, extendable to 3 years with registration
Compatibility
• Fully compatible with all M18 tools and chargers
• Part of the M18 system — over 315 tools supported
Alternative
M18HB5 — HIGH OUTPUT 5.0Ah version with improved thermal performance and sustained power delivery
An introduction to li-ion batteries: Li-ion batteries, short for lithium ion, are the latest in battery technology. Click here to see all our batteries & chargers
To choose between li-ion batteries: The higher the Ah (Ampere hours) the longer the interval between charges; the fewer times you recharge a battery the longer it will last. Click here to see all our li-ion batteries
- Milwaukee offer a warranty extension to 3 years on power tools, find out more here
- The additional 2 years warranty is available if you register your new Milwaukee power tool within 30 days of the purchase date here
- Warranty claims: Please submit your warranty claim directly with Milwaukee Tool via their online warranty portal:
https://warranty.milwaukeetool.eu/en-uk/home
The end user will need to create a Milwaukee account if they do not already have one, or log in to an existing account to proceed with the claim.
Once logged in, follow the on-screen instructions to register the tool and submit the warranty request.
Please contact Howe Tools should you need any assistance with the process.
- You can order until 8pm for free next working day delivery to nearly all of England and Wales. For locations further from our hub, our cut off is 5pm. Some harder-to-reach locations may take an extra day. More info »
- For most orders we use a premium carrier that notifies you of a one hour timed delivery slot and sends text updates.
- If you change your mind within 30 days of buying a tool, no problem. Provided the tool has not been used and is in its original packaging, please email us at [email protected] quoting your order number, and we'll reply with your return options.
- If the tool is faulty within 30 days of buying it, we will arrange for its collection at no cost to you and supply a replacement.
- If the tool is faulty after 30 days of buying it, and before the expiry of the manufacturer’s warranty, we will guide you through the manufacturer’s warranty process.



