[Easy to install]: Easy to install, easy to lock the battery, , safe and stable to use, DIY is fun. The adapter cannot be , remove the adapter before charging. [Material ] Made of high-quality ABS plastic, solid design, made of high-quality material, and safe, comfortable to carry and easy to use. [Easy to install]Easy to install, easy to lock the battery, , safe and stable to use, DIY is fun. Battery Converter Adapter:for 20V Lithium Battery to for 18V Li-Ion Power Tool Accessories The products are only used for flexible conversion between one tool and another lithium battery, and do not involve any other ! The products are only converter, not charger, not battery, not machine, also can not recharge battery by it. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Color: Black Material: plastic Package Contents: 1 x adapter(battery not include) 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.