Introduction
This manual provides essential instructions for the safe and effective use of your CRAFTSMAN CMCB98027 40V Max Lithium Battery. This 2.5 Amp Hour lithium-ion battery is designed for compatibility with most CRAFTSMAN 40V products, offering reliable power for your outdoor tools. Please read this manual thoroughly before first use and retain it for future reference.

Figure 1: CRAFTSMAN CMCB98027 40V Max Lithium Battery. This image shows the overall design of the battery pack, highlighting the CRAFTSMAN branding and the 40V MAX Lithium 2.5Ah labeling.
Safety Information
Always observe basic safety precautions when using battery-powered tools to reduce the risk of fire, electric shock, and personal injury. This battery contains lithium-ion cells. Do not incinerate the battery even if it is severely damaged or completely dead. The battery can explode in a fire. Always dispose of batteries according to local regulations.
- Do not immerse the battery in water or other liquids.
- Do not store or use the battery in locations where the temperature may reach or exceed 104°F (40°C).
- Do not charge the battery in a damp or wet environment.
- Do not attempt to open, disassemble, or service the battery pack.
- Use only with CRAFTSMAN 40V chargers.
Setup
Initial Charging
- Ensure the battery is clean and dry before charging.
- Insert the battery pack into a compatible CRAFTSMAN 40V battery charger. Ensure it clicks securely into place.
- Connect the charger to a standard electrical outlet.
- The charger's indicator lights will show the charging status. Refer to your charger's manual for specific light patterns.
- Allow the battery to charge fully before first use. A full charge typically takes several hours.
- Once fully charged, disconnect the charger from the outlet and remove the battery.
Battery Status Indicator
The CMCB98027 battery features a built-in status indicator to display the remaining charge level. Press the button on the battery to activate the indicator lights.

Figure 2: Battery Status Indicator. This close-up image shows the LED lights on the battery pack that indicate the charge level when the button is pressed.
- Four lights: Full charge.
- Three lights: Approximately 75% charge.
- Two lights: Approximately 50% charge.
- One light: Low charge, recharge soon.
- One flashing light: Very low charge, recharge immediately.
Operating Instructions
Inserting the Battery into a Tool
- Ensure the power tool is turned off and disconnected from any power source (if applicable).
- Align the battery pack with the battery port on the CRAFTSMAN 40V tool.
- Slide the battery into the port until it clicks securely into place. Do not force the battery.
- Verify the battery is firmly seated before operating the tool.
Removing the Battery from a Tool
- Turn off the power tool.
- Locate the battery release button(s) on the tool.
- Press and hold the release button(s) while sliding the battery pack out of the tool.
- Store the battery in a safe, dry place.
Compatible Tools
The CRAFTSMAN CMCB98027 40V Max Lithium Battery is compatible with most CRAFTSMAN 40V products, including but not limited to:
- CRAFTSMAN 40V Line Trimmer (Model 98020)
- CRAFTSMAN 40V Sweeper (Model 98021)
- CRAFTSMAN 40V Hedge Trimmer (Model 98022)
- CRAFTSMAN 40V Chainsaw (Model 98023)
Maintenance
Cleaning
- Keep the battery pack clean and free of debris.
- Use a clean, dry cloth to wipe the exterior of the battery. Do not use water, solvents, or harsh chemicals.
- Ensure the battery terminals are clean and free of corrosion.
Storage
- Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
- Avoid storing the battery in temperatures below 32°F (0°C) or above 104°F (40°C).
- For long-term storage, charge the battery to approximately 50-75% capacity. Fully discharged batteries can be damaged if stored for extended periods.
- Keep the battery away from metal objects that could short the terminals.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging. |
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| Battery not holding charge / Short run time. |
|
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| Battery indicator lights not working. |
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Specifications
| Feature | Detail |
|---|---|
| Model Number | CMCB98027 |
| Battery Type | Lithium Ion |
| Voltage | 40V Max |
| Capacity | 2.5 Amp Hours |
| Product Dimensions (L x W x H) | 7.19 x 3.38 x 5.88 inches |
| Item Weight | 1.6 pounds |
| Manufacturer | CRAFTSMAN |
Warranty Information
CRAFTSMAN products are manufactured to high-quality standards. For detailed warranty information regarding your CMCB98027 40V Max Lithium Battery, please refer to the warranty card included with your purchase or visit the official CRAFTSMAN website. Warranty terms and conditions may vary by region and product.
Support
If you have any questions or require assistance with your CRAFTSMAN CMCB98027 40V Max Lithium Battery, please contact CRAFTSMAN customer support. You can typically find contact information on the official CRAFTSMAN website or on your product packaging.
Online Support: Visit www.craftsman.com for FAQs, product registration, and service center locations.





