Makita BL1830 LXT Lithium-Ion Battery - 18 Volt 

• Produces 280 percent more lifetime work with 2 times more cycles
• Charging at any time will have no effect on the battery
• Self-discharge keeps battery cells active and ready for use
• Built-in memory chip memorizes the usage history and communicates with the charger
• Built-in fan cools the battery to produce more lifetime work 

Weight (KG): 0.500