Composite Adjustable Battery Holder & Backstop offer simply and secure battery pack installation without tape and without negative effects on chassis flex. The system controls the positioning regarding the pack within the framework while at precisely the same time reducing the battery power's impact on framework flex, causing more consistent control and security. Smart battery pack holders are created specifically for LiPo batteries and tend to be reinforced for harder impacts. The battery holders avoid the batteries from moving under race conditions and crashes. The battery backstop system ended up being redesigned for use because of the increasingly common shorty batteries. Now incorporated in motor mount for simple installation and modification. The battery pack backstop prevents batteries from moving in a crash. Inside front, the backstop is attached to the servo mount; into the back towards the motor mount.