EFI Firmware Update for Retina Display and Battery Life

I recently installed the EFI firmware update (1.0) for the macbook pro with retina display and have found my battery life has reduced from what used to be 5 hours or so to maybe 2 hours. Furthermore, I have noticed that my computer runs significantly hotter than it used to. Has anyone experienced this and know why this is the case? I would like to restore my battery life.