This adapter allows the use of listed lithium batteries with 20V MAX lithium cordless tools, enabling you to benefit from the extended run-time of Li-Ion Batteries on your existing 18V tools. The maximum initial battery voltage (measured without a workload) is 20 volts, while the nominal voltage is 18 volts. It facilitates the use of 18V Lithium batteries and replacement batteries compatible with most models such as: BL1860B/BL1860/BL1850B/BL1850/BL1840/BL1830B/BL1830/BL1820/BL1815, etc. It is designed for 20V MAX lithium cordless tools. Colour: Black Material: Plastic Package Contents: 1 * Adapter Only the above package content is included; other products are not included. Note: Lighting and different displays may cause the item's color in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3 cm.