Converter bottom: 

• Compatible with for Worx 20V small Foot Plate lithium battery(Orange);
  For Worx 4Pin Battery:WA3551.1, WA3530, WA3553, 20V lithium battery.

Convertor top: 

• compatible with Makita BL series 18V lithium ion power tools; (Makita power tools must match BL1815 BL1820 BL1830 BL1830B BL1840 BL1840B BL1850 BL1850B BL1860 BL1860B, 18V Lithium ion battery )

Convert for Worx 4PIN 20V lithium battery to for Makita 18V lithium battery tool, Use for  Worx   4 PIN 20V lithium battery to  for Makita 18V lithium battery tools. It lets you share for  Worx   4 PIN 20V lithium battery with your Makita 18V lithium battery kit. 

This converter does not support the Worx 20V lithium battery with the Makita charger!

Package Included:

1x Adapter (Only Adapter, No Battery) 

WARNING:

1. Make sure that the battery is fully inserted for normal use

2. Please do not force into the battery pack, if the battery pack can not be installed, the installation method may be wrong

3. This product is only compatible with the tools, not compatible with the charger, Do not use the adapter to charge the battery

4. When you need to charge the battery, remove the converter