[Applicable Batteries] Fully for 18V li-ion battery,such as BAT609, BAT610G, BAT618, BAT618G, BAT619, BAT620, BAT621, BAT607, BAT622, BAT609G ,etc. [Compatibility]Can replace (for ) 20V 6-pin lithium batteries, such as WA3520, WA3525, WA3578, etc [Product Function] This adapter can make listed lithium batteries use for 20V 6Pin tools, and let you Enjoy the benefits of extended run-time of Li-ion Batteries on your existing 18V tools. [Material ] Made of high quality plastic, solid design, made of high quality material, and safe, convenient to carry and easy to use. [Notice] It cannot be used to charge the battery of a power tool, and the adapter cannot be plugged into any charger. If you need to charge the power , use the battery charger. Please note: 1. This adapter is not suitable for "ALL 18V "series lithium batteries (marked " X " ), as shown in the figure below: 2. This product is only used to replace (for ) 20V 6-pin lithium batteries and cannot replace (for ) 4-pin 5-pin batteries. Color: Black Material: plastic Package Contents: 1 x Adapter (without battery!) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.