If your battery is ok,Big game and small run applications. These applications are battery killer, will quickly consume battery power. In the non-necessary to turn off wireless communications, such as Bluetooth, wifi, etc. Find the manage power of the program. Andrews optimization guru-saving management will provide a list of programs into the mobile phone power, find power-hungry, over or deleted.www.iboxfix.com
Find a hot water bottle to put on top of the battery ,as WHICH is the ionic liquid, the cold weather easily freeze the battery, battery can be removed if you use the universal rechargeyour, Flush enough, not be ok,next step to find the output voltage is larger than the original charger (not higher than 10V), it is impossible,then go to buy a bttery to change,it is not expensive.hope can help you.
May be a network connection failure or installation access restrictions due. To install the system update file must be installed Licenses. If the phone is not ROOT, general operating system can not be updated. Good luck to you!www.iboxfix.com