Since the latest firmwae update was applied, my phone discharges rapidly. The battery usage details shows that the "Keep Awake" is taking the lion's share. Is there a way to back off the firmware update?
Thanks so much for the post! Unfortunately there's no way of downgrading your devices software that's easy or supported. Have you tried backing up all of your data and restoring your device to factory default settings? There could have been a glitch during the upgrades which could be causing the battery drain. Another option would be a service and repair center.
Let me know what you've attempted thus far. I'll do my very best to help!