Makita BL1820B 18V Compact 2.0Ah Battery — Fast Charge, Longer Run Time

Compact power for all-day cordless performance

The Makita BL1820B slips into tool grips with balanced weight and a slim profile, delivering dependable power when you need it. Inside is a 2.0Ah lithium-ion cell designed to keep your cordless tools working smoothly across tasks, from drilling to driving. This battery is built to pair with Makita's broad 18V LXT lineup, giving you one unified ecosystem for continued productivity on the job site.

Key advantages at a glance

• Up to 50% more run time per charge than the older 18V compact option, helping you complete more work between swaps.
• Full charge in about 25 minutes, enabling quicker tool readiness between tasks.
• Low self-discharge keeps the battery ready for use after long storage periods.
• Designed for compatibility with a wide range of 18V LXT tools for versatile use.
• Steady power delivery in extreme temperatures, so tools stay reliable in challenging environments.

When paired with the Rapid Optimum Charger, the system actively monitors current, voltage and temperature to optimize charging. The charger also features a built-in fan to help keep temperatures down, supporting faster charging on hot days or heavy-use sessions.

Real-world use cases

• Framers and electricians can switch between tools without frequent battery swaps, preserving workflow momentum.
• In a crowded workshop, the compact design reduces fatigue and improves balance in hand.
• During winter projects, the battery maintains performance without significant power drop.

Makita includes STAR Protection Computer Controls, which facilitates real time communication between tool and battery to guard against overload, over-discharge and overheating. This support helps protect tool life and maintain consistent performance over time. The 18V LXT platform represents Makita’s expansive cordless ecosystem, offering broad compatibility across tools you already rely on.

Note that the Rapid Optimum Charger is sold separately, and using it with this battery can help maximize charge efficiency and uptime on demanding workdays.