I have noticed that over the past few weeks, my battery continues to fluctuate between 43% health (Replace Soon) and 95% health (Normal). The weird part is that, when the battery is listed as 95% health, it functions normally (2 hours of charge). However, when the battery is listed as 43% health, it lasts significantly less even when doing the same light web browsing. Anyone have any ideas? Replace the battery? Is it defective? Thanks!