Composite Adjustable Battery Holder & Backstop offer just and secure battery installation without tape and without negative effects on framework flex. The system controls the placement of this pack in the framework while in addition reducing the battery pack's affect framework flex, leading to more constant maneuvering and stability. Smart battery pack holders are specifically made for LiPo batteries and therefore are strengthened for harder effects. The battery holders prevent the batteries from going under race conditions and crashes. The battery backstop system had been redesigned to be used using the increasingly typical shorty batteries. Now incorporated in motor mount for effortless assembly and modification. The battery backstop stops batteries from relocating an accident. Inside front side, the backstop is mounted on the servo mount; in the backside toward engine mount.