Available now at Laylax is the GIGA TEC PSE Lipo CMG Connector For Marui MP7. This allows you to use a Lipo Battery to power the compact AEG... "A conversion connector that can operate Tokyo Marui electric compact machine gun series (electric CMG) with a lipo battery.

The metal terminals in contact with the gun body side contacts are boron-plated for excellent conduction efficiency and wear resistance, and the compact and highly versatile BEC type connector is used for connecting to the battery.