Wow I never seen before this type of battery backup after twelve ( 12) hours of using this mobile battery backup is reduce fourty to fifty persent, & large high definition display lovely clarity & mattel body sexy look its better than all J series in samsung & front flash is help full to click sexy selfies in night capture photos, its overall performance is satisfied you I just love this hand set & I am recommending to all my friends & relatives this mobile is satisfying all those, this mobile is my on of the best mobile in all time