One 18V Ridgid Battery (Not An Advanced 18V Battery) Is Compatible With One Features: Suitable For RIDGID 18V Battery Pack.(Not Compatible with RIDGID 18V ADVANCED Batteries) Suitable for Ryobi 18V Series Cordless Tools Professional compact design and easy installation. For a long time don't use, please separate from the battery. The adapter doesn't support charging for RIDGID 18V batteries (please use the original charger) WARNING: Please don't try to use RIDGID 18V ADVANCED Batteries (Different PIN Sorting) 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, Don't use the adapter to charge the battery When you need to charge the battery, remove the converter Package Includes: 1*Adapter (Adapter Only, Battery Tool Not Included) Suitable For RIDGID 18V Battery Pack.(Not Compatible with RIDGID 18V ADVANCED Batteries). Suitable For RYOBI 18V System Cordless Tools. The adapter doesn't support charging RIDGID 18V Batteries (please use the original charger). Professional compact design, Let your tools and batteries work continuously and stably. Adapter structure thickened design