Well mine is still as good as ever. With heavy use all day, 3-4 phone calls, texting, web surfing, editing my bookmarks, playing words, geting NFL updates all day, etc...I got 8 hours and 30 minutes of usage and 15 hours of stand by. I am now at 7% battery left. I have BT disabled and some notifications enabled, GPS disabled. I will plug it in when I go to bed and charge it overnight.