Changed the firmware yesterday to 4.10 and the battery is draining in less than 24 hours. I had added Amazon music and I thought this was draining the battery or the issue, then I could not uninstall it. I have performed a hard reset and then was able to uninstall amazon music. I am still having the same poor battery performance. I have charged up to 100% during the day and now at 9pm at 19% without any exercises. Next step is to let it drain to 0% and recharge... this I haven't done yet.