I have a mid-2012 Macbook Air that has been seeing a reduction in battery life. The machine currently has a cycle count of 432 with a full charge capacity of 5272 mAh. I was wondering if it would be worthwhile for me to invest in replacing the battery. If so, should I bring it to the Genius Bar or install it myself? I know there is a large cost difference and am not afraid of the technical work, but am a little weary about hardware failure. Any thoughts on this matter would be greatly appreciated. Thanks.