18V LXT Lithium-Ion 3.0 Ah Battery Makita: Best in Class Engineering! 3.0 amp-hour capacity 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) (1) 18V LXT Lithium-Ion Battery - BL1830 Operating Manual BL1830