Bottom of converter: Compatible with Makita BL series 18V lithium ion batteries; Top of the converter: Convert to For Milwaukee 18V Lithium-Ion Battery: 48-11-1880, 48-11-1835, 48-11-1865, 48-11-1890, 48-11-1860, 48-11-1850, 48-11-1812,48-11-1840, 48-11-1820, 48-11-1815, 48-11-1828. For Makita 18V lithium battery can be converted to For Milwaukee 18v lithium battery tool with this converter. Get for Makita 18V lithium battery to share with for Milwaukee 18V lithium battery tool. 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