Bottom of converter: Compatible with Milwaukee 18V lithium ion battery; Converter top: Compatible with Worx 20V small foot lithium battery tool (orange); (for Worx tools must be compatible with WA3551.1,WA3530,WA3553, 20V small foot (orange) Lithium ion battery model compatible ) for Milwaukee 18V lithium ion battery is applied to the bottom of the converter: 48-11-1828 48-11-1815 48-11-1840 48-11-1850 48-11-1860 48-11-1890 18V lithium batteries... for Milwaukee 18V lithium battery converted to for Worx 20V small foot lithium battery tool (orange), Use for Milwaukee 18V lithium battery for the for Worx 20V lithium foot battery tool, and let for Milwaukee 18V lithium battery and for Worx 20V lithium foot battery tool share the battery. This converter does not support for Milwaukee 18V lithium battery and for Worx shared charger! Package Included: 1x Adapter (Only Adapter, No Battery) WARNING: Make sure that the battery is fully inserted for normal use Please do not force into the battery pack, if the battery pack can not be installed, the installation method may be wrong This product is only compatible with the tools, not compatible with the charger, Do not use the adapter to charge the battery When you need to charge the battery, remove the converter