With MTB18GWL, you can use for 18V Li-ion battery on for green large foot electric power tools. These adapter MTB18GWL is only suitable for green large foot tools that can use 20V 5 pin wide Socket lithium battery. Base of the converter: Compatible with for BL series 18V lithium-ion batteries; Applicable for battery models: BL1815, BL1815B, BL1820, BL1820B, BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860, BL1860B, BL1845, BL1890, BL1890B, 18V lithium batteries. Top of the converter: Compatible with for 20V Li-ion Battery Tools (Green). (for tools must be compatible with WA3593, WA3595, WA3401, 20V Li-ion Battery models (Green).) This converter converts for 18V lithium-ion batteries to for 20V Li-ion Battery Tools (Green). This converter allows you to use for 18V lithium-ion batteries with for 20V Li-ion Battery Tools, allowing your for 18V lithium-ion batteries to share batteries with for 20V Li-ion Battery Tools. This converter does not support for 18V lithium-ion batteries and for chargers. Note: This product is only adapter. This product does not include machine and battery. The machine and battery in the product description are only used to show the products. The products are only used for flexible conversion between one power 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! Color: Black Material: plastic Package Contents: 1 * MTB18GWL Battery Adapter 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.