Converter Bottom:Compatible with 18V lithium- battery. Adapter Top:The top of the adapter is compatible with 20V cordless power tools (WG151, WG251, WG540, WG891, WG151, WG151.5, WG800.1 power tools can be used). The corresponding lithium battery is for 20V WA3520 WA3525 WA3575 WA3578 power . The bottom of the converter is suitable for 18V lithium- battery: 48-11-1828 48-11-1815 48-11-1840 48-11-1850 48-11-1860 48-11-1890, 18V lithium battery... It is suitable for converting 18V lithium battery to 6-pin 20V lithium battery tool. Through this converter, you can use for 18V lithium battery on 6-pin 20V lithium battery tool, so that your for 18V lithium battery can be used with 6 Pin 20V lithium battery tools share the battery. This converter does not support for 18V lithium battery and for 20V lithium battery to share the charger Type:Battery Adapter Precautions: 1.The adapter has a protective plate. When not in use for a long time, separate the battery from the adapter to avoid damage to the battery 2.There is only one adapter, not including batteries and electric drill tools. The appearance and color of products with different batches, which will not affect the use Colour:Black Material:plastic Package Contents: 1 * Converter 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.