i have the ativ s for over 2 months. the battery life is ok , i get 2.5 days with light-medium usage. the problem appears when i charge the phone. it takes about 4-5 hours to fully charge from 8-10% left. i'm charging with the wall charger (1AMP) original from samsung. the battery is also original too. in the first week it charged in 2 hours like any normal smartphone with 2300 battery. i think the update to gdr2 is the problem. before was ok.. in the background i only have FB, extra settings, insider, youtube and now. if i go to sleep and the phone has 100%, in the morning (after 7-8 hours), drops to 97-98%, and i think it's ok, cause wifi and cellular data are off, backup, sync, BT, location also OFF. so what is wrong? the battery i quess. i used a nokia charger with 0.75amps and it charges exactly the same. also with another 1amp samsung wall cable it's the same. my cable is usb+adapter for wall. i noticed the mini usb has only 4 pins and im preety sure i got it this way. after i searched google it says that that is the cables come this way because the 4th pin (which is missing) is used to verify if you are using usb charging or wall charging - something like that...not sure).. any ideas ? please help...