iphone ios 8.4.1 battery life is poor
I Upgraded my iPhone 6 to ios 8.4.1 & now my battery life has been reduced to 4 hours or less. I have tried various remedies including turning off all app background processing & both hard & soft system resets but to no avail. Additionally, my wifi performance has become sporadic. The phone frequently drops or does not connect to wifi networks that I used to have excellent performance against. I am not happy with this upgrade, especially due to the battery performance, & wish I had left it at ios 8.4. Any help would be appreciated.