Makita (1) DC18RC Charger & (2) 18 Volt BL1815 Lithium Ion Batteries Includes (2) 18V 1.5 Ah Compact Lithium-Ion Makita Batteries - BL1815N and (1) DC18RC Makita Charger Charging Technology: Controls current, voltage & temperature to maximize battery life Charger Central Processing Unit (CPU): Analyzes data from the battery's memory chip Charges the BL1815,BL1815N & BL1830 18 volt & 14.4 volt Li-Ion batteries Battery's built-in Memory Chip communicates with the charger to maximize battery life