1. Introduction
This manual provides essential information for the safe and effective use of your Milwaukee M18 RedLithium CP2.0 Compact Battery Pack. Please read and understand all instructions before using the battery pack. Retain this manual for future reference.

Image 1.1: Front view of the Milwaukee M18 RedLithium CP2.0 Compact Battery Pack, highlighting the M18 RedLithium CP2.0 branding.
2. Safety Instructions
Always observe the following safety precautions to reduce the risk of fire, electric shock, personal injury, and material damage.
- Read All Instructions: Before using the battery pack, read this user manual and all labels on the battery pack and the tool it powers.
- Use Correct Charger: Only charge the battery pack with the charger specified by Milwaukee. Using an incompatible charger may create a risk of fire.
- Avoid Short Circuits: Do not short-circuit the battery pack. Keep the battery pack away from metal objects like keys, coins, or jewelry that could make a connection between the terminals.
- Do Not Incinerate: Do not dispose of battery packs in a fire. The battery may explode.
- Protect from Water: Do not expose the battery pack to water or rain.
- Avoid Extreme Temperatures: Do not store or use the battery pack in locations where the temperature may reach or exceed 122°F (50°C).
- Handle with Care: Do not drop, crush, or damage the battery pack. Do not use a battery pack that has been dropped or received a sharp blow.
- Proper Disposal: Dispose of used battery packs according to local regulations. Do not dispose of with household waste.
3. Setup
3.1 Initial Charging
- Ensure the battery pack is clean and dry before charging.
- Insert the battery pack into a compatible Milwaukee M18 charger.
- Allow the battery to charge fully before first use. Refer to your charger's manual for specific charging indicators and times.
3.2 Inserting the Battery Pack into a Tool
- Align the battery pack with the battery port on your Milwaukee M18 power tool.
- Slide the battery pack firmly into the tool until it clicks into place. Ensure it is securely latched.
3.3 Removing the Battery Pack from a Tool
- Locate the battery release button on the tool.
- Press and hold the release button.
- Slide the battery pack out of the tool.
4. Operating Instructions
4.1 Checking Battery Charge Level (Fuel Gauge)
The Milwaukee M18 RedLithium CP2.0 battery pack features an on-board fuel gauge to display the remaining charge. Press the fuel gauge button to activate the LED indicators.

Image 4.1: Top view of the battery pack, showing the Milwaukee logo and the four-bar LED fuel gauge.
- Four Solid Green Lights: 75-100% charge remaining.
- Three Solid Green Lights: 50-75% charge remaining.
- Two Solid Green Lights: 25-50% charge remaining.
- One Solid Green Light: 10-25% charge remaining.
- One Flashing Green Light: Less than 10% charge remaining, recharge soon.
4.2 Overload Protection
The battery pack is equipped with overload protection. If the tool is overloaded, the battery may temporarily shut down to prevent damage. Release the tool trigger, allow the battery to cool, and then resume operation.
5. Maintenance
5.1 Cleaning
Keep the battery pack terminals clean and free of debris. Use a clean, dry cloth to wipe away any dust or dirt. Do not use solvents or harsh chemicals.
5.2 Storage
- Store the battery pack in a cool, dry place, away from direct sunlight and moisture.
- Avoid storing in temperatures below 32°F (0°C) or above 104°F (40°C).
- For long-term storage, it is recommended to store the battery pack with a partial charge (around 50%).
6. Troubleshooting
6.1 Battery Not Charging
- Ensure the battery pack is properly seated in the charger.
- Verify the charger is plugged into a working power outlet.
- Check for any damage to the battery pack or charger. If damaged, do not use.
- Ensure the battery and charger are within the recommended operating temperature range.
6.2 Battery Not Powering Tool
- Check the battery's charge level using the fuel gauge. Recharge if necessary.
- Ensure the battery pack is fully inserted and latched into the tool.
- Inspect the battery and tool terminals for dirt or damage.
- If the tool has been overloaded, allow the battery to cool down before attempting to use it again.
6.3 Reduced Run Time
- Battery performance can decrease in extremely cold temperatures.
- Over time, all rechargeable batteries experience a gradual decrease in capacity.
- Ensure the battery is fully charged before each use.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | Milwaukee |
| Model Number | 48-11-1820 (Internal Model: ITBD-811060) |
| Battery Type | Lithium Ion |
| Battery Capacity | 2 Amp Hours |
| Product Dimensions | 7.56 x 3.62 x 2.56 inches |
| Item Weight | 8.8 ounces |
| Manufacturer | Milwaukee Tool |
| Date First Available | September 21, 2017 |
| Recommended Use | Power Tool |
8. Warranty and Support
Milwaukee Tool products are designed for durability and performance. For specific warranty information regarding your M18 RedLithium CP2.0 Compact Battery Pack, please refer to the warranty statement included with your original purchase or visit the official Milwaukee Tool website.
For technical assistance, troubleshooting beyond this manual, or to locate an authorized service center, please contact Milwaukee Tool customer support:
- Website: www.milwaukeetool.com
- Customer Service: Refer to the website for regional contact information.





