Makita BL1820B 18V Compact 2.0Ah Li-Ion Battery - Fast Charge, Longer Run Time

Compact power for professional cordless tools

The Makita BL1820B 18V Compact Lithium-Ion battery balances light weight with reliable performance. Designed for slim 18V LXT tools, it helps reduce fatigue while delivering steady power across a workday. The 2.0 Ah capacity offers a practical balance between runtime and handling, so you can move swiftly from task to task.

With smart charging options, this battery is built to help you maximize uptime. It resists self-discharge so it’s ready to go after periods of storage, and its charging ecosystem aims to shorten downtime between uses.

What makes it stand out

• Up to 50% more run time per charge than the BL1815 18V compact model.
• Full charge in 25 minutes or less, so you can get back to work quickly.
• Resists self-discharge and maintains power in cold or hot conditions.
• Integrated LED indicator helps you plan top-ups at a glance.
• Compatible with 18V LXT tools for a flexible, single-battery setup.
• STAR Protection Computer Controls communicate with the tool to monitor load, temperature, and current in real time.

Optional charging system: The Rapid Optimum Charger (sold separately) communicates with the battery to optimize charging and features a built-in fan for faster cooling, helping efficiency during warmer days.

Real-world uses and benefits

• On a job site: extended run time keeps your cordless tools moving through framing, decking, or trim without frequent swaps.
• At the workshop: quick top-ups between tasks with a short 25-minute recharge helps maintain momentum.
• In variable climates: steady performance in extreme temperatures ensures consistent tool power when conditions change.