2 x Makita BL1830 18v 3.0AH Battery BL1830 Makita 18v 3Ah LXT Lithium-Ion battery and optimum charging system produces 280% more 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 (16) 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) What are the benefits of the new "Star" Battery The demanding applications you take on every day are also demanding on your cordless tools and batteries. You rely on your tools, so Makita created STAR Protection Computer Controls�. STAR Protection is communication technology that allows the tool and battery to monitor conditions and exchange data in real time to protect against Overloading, Over-Discharging and Over-heating. Look for Makita tools and batteries with the STAR and get these protection features. OVERLOAD PROTECTION High-drain applications require maximum battery power. Makita tools and batteries are engineered for industrial applications, but sustained peak demand can overload the tool. Makita's STAR Protection Computer Controls� allow the battery and tool to communicate and protect your tool and battery from overload by cutting power when put under abnormally high current draw. OVER-DISCHARGE PROTECTION Lithium-ion batteries are engineered for longer, sustained performance. But running a battery until it's �dead� empty can damage the cells. Makita STAR Protection Computer Controls� monitor battery charge capacity, and if the battery is too low to complete the application it will cut power in order to extend battery life. OVER HEAT PROTECTION Extreme heat is the enemy of ALL batteries. It ca