2x Genuine Makita 18V 4.0Ah LXT Lithium Battery BL1840 + DC18SD 240v Charger

Desciption For X2 BL1840 Features include: Unbeatable 36 minute charge time. Up to 33% extra runtime and extended battery life. Same size and weight as 3.0Ah BL1830. Works with your current Li-ion chargers. Computer controlled optimum charging. Compatible with starred terminal machines. Compatible with yellow terminal machines. Cooling System for max battery life. Battery protection circuit. LXT Lithium-Ion battery and optimum charging system produces 280 percent total lifetime work with 2x more cycles. 5x Lower self-discharge keeps battery cells active and ready for use, even after long periods of storage. Charging at any time will have no effect on the battery. Built-in shock absorbing features protect the battery. Sixteen firm holding contact terminals reduce the risk of power loss/fluctuation in high vibration work environments. Battery's built-in Memory Chip communicates with the charger to maximize battery life using 3 Active Controls (Current, Voltage & Thermal). Battery