I don't know If it's normal, but I'm noticing a bug on my battery life... Once my phone hits 5% about to die, the transition to 0% goes quick, about 3 seconds, it goes down to 4, 3, 2, and so on. Then when I'm at about 2% left, I plug the charger, and remove it immediately, and the battery goes up to 5%. I have let my phone die completely several times but nothing seems to work... Is there any other way to calibrate the battery other than letting it die ?