Bottom of converter: Compatible with Makita BL series 18V lithium ion batteries; Converter top: Compatible with For Worx 20V big Foot Plate Lithium Battery Tool(green); For Worx 5Pin tools must be compatible with WA3593 WA3595 WA3401 big foot board (green) lithium-ion battery models. for Makita battery at the bottom of the converter: BL1815 BL1815B BL1820 BL1820B BL1830 BL1830B BL1840 BL1840B BL1850 BL1850B BL1860 BL1860B BL1845 BL1890 BL1890B, 18V Lithium battery...... for Makita 18V lithium battery can be converted to For Worx 5PIN 20V big Foot Plate lithium battery tool with this converter. Get For Makita 18V lithium battery to share with for Worx 5PIN 20V 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