The Makita 18V LXT Lithium-Ion 4.0Ah Battery (BL1840) provides up to 35% more run time per charge than the BL1830. It charges in 40 minutes. A built-in LED charge level indicator shows the battery status at a glance.
The battery is designed to resist self-discharge, so it is ready to use after long periods of storage. When used with the Makita Rapid Optimum Charger (sold separately), it communicates with the charger to monitor current, voltage, and temperature. A built-in cooling fan improves charging performance, even in hot conditions.
STAR Protection Computer Controls allow real-time communication between the tool and battery. This helps prevent overloading, over-discharging, and overheating. The battery works only with Makita STAR Protection tools, which are identified by the Star Symbol and/or a yellow battery receiver under the tool.
- Model
- BL1840
- Voltage
- 18V
- Capacity
- 4.0Ah
- Battery type
- Lithium-ion, slide-style
- Charge time
- 40 minutes
- Run time
- Up to 35% more per charge than the BL1830
- Indicator
- Built-in LED charge level indicator
- Compatibility
- Makita STAR Protection tools only (Star Symbol and/or yellow battery receiver under the tool)
- Charger
- Makita Rapid Optimum Charger, sold separately