CNC-machined battery backstop for XRAY X12ââ¬â¢22 made from premium-grade graphite material. The electric batteries backstop and rear link brace enable a wider selection of battery power positioning adjustment and match battery pack size. Frontward-placed battery power makes the automobile safer to drive, decreases wheel lift in corners, and makes the vehicle more predictable over bumps. Rearward-placed battery pack makes the car more aggressive, increases cornering speed, but makes the automobile a great deal harder to use an automobile.