Introduction
This manual provides essential information for the safe and effective use of your Makita BL1820 18V Compact 2.0Ah Lithium-Ion Battery. This battery is designed to deliver reliable power for Makita 18V LXT and 18V Compact cordless tools, offering extended run time and a fast charge capability.
The Makita BL1820 battery provides up to 50% more run time per charge compared to the 18V 1.5Ah battery (BL1815) and can reach a full charge in approximately 25 minutes when used with a Makita Rapid Optimum Charger (sold separately). It is engineered to deliver consistent power and performance, even in extreme temperatures.
Image: Makita BL1820 18V Compact 2.0Ah Lithium-Ion Battery, front view.
Important Safety Information
Always read and understand all safety warnings and instructions before using this battery. Failure to follow these instructions may result in electric shock, fire, and/or serious injury.
- Do not disassemble, open, or shred battery pack.
- Do not short-circuit a battery pack. Do not store battery packs haphazardly in a box or drawer where they may short-circuit each other or be short-circuited by conductive materials.
- Do not expose battery pack to heat or fire. Avoid storage in direct sunlight.
- Do not subject battery pack to mechanical shock.
- In the event of battery leakage, do not allow the liquid to come into contact with the skin or eyes. If contact has been made, wash the affected area with copious amounts of water and seek medical advice.
- Keep battery pack clean and dry.
- Recharge only with the charger specified by Makita. Do not use any charger other than that specifically provided for use with the equipment.
- Do not use any battery pack which is not designed for use with the equipment.
- Keep battery pack out of the reach of children.
- Observe the plus (+) and minus (-) marks on the battery and equipment and ensure correct use.
- Dispose of battery pack properly.
Setup and Charging
Initial Charging
Before first use, fully charge the battery. Connect the battery to a compatible Makita Rapid Optimum Charger (sold separately). The charger will indicate when the battery is fully charged. A full charge typically takes 25 minutes or less.
Installing the Battery
To install the battery into a compatible Makita 18V LXT or 18V Compact cordless tool:
- Align the battery with the battery port on the tool.
- Slide the battery into the port until it clicks securely into place. Ensure it is fully seated and locked.
Image: Underside view of the Makita BL1820 battery, showing the connector terminals.
Removing the Battery
To remove the battery from a tool, press the release button(s) on the battery pack and slide the battery out of the tool.
Operation
The Makita BL1820 battery is designed for use with Makita 18V LXT and 18V Compact cordless tools. Once installed, the tool is ready for operation according to its specific instruction manual.
Optimal Performance Tips
- Always use fully charged batteries for best tool performance.
- Avoid completely draining the battery before recharging to prolong its lifespan.
- The battery delivers consistent power even in extreme temperatures, down to -4°F (-20°C).
Maintenance and Storage
Cleaning
Keep the battery terminals clean. Use a dry cloth to wipe off any dust or debris. Do not use water or chemical cleaners.
Storage
- Store the battery in a cool, dry place, away from direct sunlight and excessive heat.
- For long-term storage, it is recommended to store the battery with a partial charge (around 50%).
- Do not store the battery in a discharged state for extended periods.
Troubleshooting
If you encounter issues with your Makita BL1820 battery, refer to the following table:
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Battery not properly seated in charger; Charger not plugged in; Faulty charger or battery. | Ensure battery is fully seated. Check charger connection. Try another charger/battery if available. |
| Tool not operating | Battery discharged; Battery not properly installed; Tool malfunction. | Charge battery. Re-install battery securely. Consult tool's manual for troubleshooting. |
| Reduced run time | Battery nearing end of life; Stored in extreme conditions; Heavy tool usage. | Consider replacing battery. Store battery in recommended conditions. |
Product Specifications
| Feature | Detail |
|---|---|
| Model Number | BL1820 |
| Voltage | 18 Volts |
| Battery Capacity | 2.0 Amp Hours (2.0Ah) |
| Battery Cell Type | Lithium-Ion |
| Item Weight | 13 ounces |
| Product Dimensions | 7 x 7 x 3 inches |
| Charge Time (Rapid Optimum Charger) | 25 minutes or less |
| Compatibility | All Makita 18V LXT and 18V Compact cordless tools |
Warranty Information
The Makita BL1820 18V Compact 2.0Ah Lithium-Ion Battery comes with a 3-year limited warranty. For specific terms and conditions, please refer to the official Makita warranty documentation or contact Makita customer service.
Support and Contact
For further assistance, technical support, or service inquiries regarding your Makita BL1820 battery or compatible tools, please visit the official Makita website or contact Makita customer service directly.
You can also visit the Makita Store on Amazon for product information and accessories.
