If your battery electricity is not enough,you can press * 3370 # key,then the phone will restart,you will find the electricity increased by 50%.
When you used up those electricity,then you will have to recharge. When battery is chargering,the invisible backup battery is chargeing at the same time. Next time,the the battery is not enough,you can use this way.
It is very usefull when you meet the emergency
form: http://www.agoodic.com/
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