The XGT® Battery Case (1910J5-2) is for use with the 40V max XGT® Brushless 5-1/2' Concrete Vibrator (GRV01), and the 40V max XGT® Brushless 8' Concrete Vibrator (GRV02). It is engineered to allow the use of the Makita ConnectX™ Adapter (191N62-4) with 40V XGT® Concrete Vibrator models GRV01 and GRV02. It is constructed with durable materials for a long life. It features quick and easy installation for user convenience.