When I first installed the 8.1 update, my battery would get very hot and only lasted 3 to 4 hours. Tried everything. shut off all apps in background. It turns out my yahoo mail in the email hub was stuck syncing. So I deleted the Yahoo email and then reset up the account and battery is not hot anymore. I also think it take a few days for all the apps and settings to adjust to the new 8.1 OS.
My phone is stable and my battery life might be even better now. Hope this helps people with similar issues.
My phone is stable and my battery life might be even better now. Hope this helps people with similar issues.