BOSCH BAT818 Battery Pack, 36V, Li-Ion, 1.3A/hr.. More details: Battery Pack, Voltage 36.0, Battery Type Li-Ion, Battery Capacity 1.3A/hr., For Use With Bosch 36V Li-Ion Tools and Accessories, Features Lighter Then A 14.4V Battery, Up to (5) Times Longer Cycle Life Than Competitive Lithium Ion Batteries, 30 min. Charge Time Charged to 80 Percent Capacity In 15 min., Easy to Read Battery Gauge and Temperature Sensor, Includes 36V Litheon(TM) Slim Pack Battery