I bought a new iPhone 5S last week, and i quickly notice how Terrible the battery lift is. I pretty much disable all the Features i could, everything! bluetooth, LTE, no Notification (just sms, and phone),spotlight, background app refresh, brightness 20-30%, location services off, and also disable all options on icloud as well! resotred the phone couple of times as a new phone with no back up(on both ios 8.1 and 8.1.1)and did like 10 to 20 full cycle charges and even after doing all of this i can barely get more then 5 hours of usage mostly on safari usually i get about 4 hours. i had a new iPhone 5S before and it had the same problem as this but Fortunately i had the option to give it back. now i can't get the money back for it, and i am out of ideas. i saw people here lasting with there phone over 6 hours and i just can get there. Any suggestions what to do? thanks.