This adapter enables compatible lithium batteries to be used with BOSCH 18V LITHIUM cordless power tools, providing extended runtime benefits of Li-Ion batteries on existing 18V tools. Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18 volts. Compatible with 18V LITHIUM batteries and replacement batteries for most MAKITA models: BL1860B, BL1860, BL1850B, BL1850, BL1840, BL1830B, BL1830, BL1820, BL1815, and similar. Designed for use with BOSCH 18V LITHIUM cordless power tools. Not intended for battery charging. This adapter will not fit into any chargers. To charge your batteries, use the original battery chargers. Color: Black Material: Plastic Size: 11 x 10.5 x 9 cm Package Contents: 1 x MT20BSL Adapter (Adapter only, battery not included)