Product description: 1. This adapter can make lithium batteries of for 18V use on for 18V/20V (MAX) Lithium cordless power tools, and let you Enjoy the advantage of extended run-time of Li-Ion Batteries on your existing 18V tools. 2. Built-in battery lock fixed combination power , non-slip design. For a long time do not use, Please separate from the battery. 3. Can not be used for power charging, this adapter not fit into any chargers. If you need to charge your power tool batteries , please use the battery chargers. Type:Battery Convertor Adapter Model :BS18DL Suitable for battery Model: Above: Compatible with for 18V 20V (MAX) Tools Base: Compatible with for 18V lithium battery 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. Material: Plastic colour: black Package Contents: 2 x Battery Adapter (no battery, no tool) 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.