This Makita 18V LXT Lithium Battery BL1840 offers an unbeatable 36-minute charge time and up to 33% extra runtime and extended battery life, while maintaining the same size and weight as the 3.0Ah BL1830. It is compatible with all Makita Li-ion LXT 18-volt machines and features a built-in shock-absorbing design for protection. The battery's Memory Chip communicates with the charger using 3 Active Controls (Current, Voltage, Thermal) to maximize battery life. With a 5x lower self-discharge rate, the battery stays ready for use even after long storage periods. The Makita DC18SD 240V Li-ion Charger is designed for 9.6v - 18v batteries and utilizes CPU technology to communicate with the battery's memory chip, optimizing the charging method for longer battery life. This charger is suitable for charging up to 3.0Ah batteries and features built-in sounds for charging status updates. It also incorporates Makita's Forced Air Cooling Fan technology to cool the battery during charging, further extending its lifespan. The charger is suitable for charging up to 3.0Ah Batteries only.