This Makita Power Source kit will be a welcome addition to anyone with a full kit of Makita Li-Ion cordless tools who regularly finds they are short of batteries and chargers. It comes complete with a Makpac carry case with inlay insert that holds up to 4 batteries and a charger. This Power Source Set Includes 2 x 5.0ah BL1850 Lithium Ion Batteries 1 x DC18RC Fast Charger 1 x Makpac Case with Inlay Features of the BL1850 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,