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