These batteries are specifically designed and built for the sony vaio pcg-fxa series PCG-FXA48 With a longer power lasting time and quick time to be fully charged, the battery gives you the best performance possible compared to original manufacturer standards for sony vaio pcg-fxa series PCG-FXA48 Batteries; even it delivers 5% more power than the original sony vaio pcg-fxa series PCG-FXA48 Battery.