The Makita 18V LXT Lithium-Ion 4.0Ah Battery (BL1840) is designed to deliver longer run time, faster charging, and reliable performance for demanding applications. It provides up to 35% more run time per charge compared to the BL1830, helping reduce downtime and keep tools working longer.
Even with its extended capacity, the BL1840 features a category-leading 40-minute charge time, allowing the battery to spend more time on the job and less time on the charger. A built-in LED charge level indicator makes it easy to check battery status at a glance.
This battery is compatible only with Makita STAR Protection tools, which are identified by the Star Symbol and/or a yellow battery receiver under the tool.
Makita 18V Lithium-Ion batteries are engineered to resist self-discharge, so they’re ready for use even after long periods of storage. When used with the Makita Rapid Optimum Charger (sold separately), the battery communicates with the charger to monitor current, voltage, and temperature, ensuring faster, more efficient charging and longer battery life. A built-in cooling fan improves charging performance, even in hot conditions.
For added durability and protection, Makita’s STAR Protection Computer Controls allow real-time communication between the tool and battery to prevent overloading, over-discharging, and overheating. As a leader in cordless innovation, Makita offers one of the largest 18V cordless tool lineups, all powered by its dependable lithium-ion slide-style battery system.