srinivaassidduYes, this happens with me too.... Seems as if it restarts to calibrate the battery. It was 85% then after just 2 mins of restarting it came to 80%.
forgot to mention that when ever I charge there is a sudden surge in battery charging it rises from 15% to 18% within seconds and in 10minutes it reaches to 55% like that. And after that it charges slowly.