I checked my battery capacity through cmd -> powercfg.exe -energy, there is 2% of difference between 'Design capacity: 599994' and 'Last full Charge 59280' although I can see the battery was fully charged message from tool bar. And even the Dell power manager says battery charge status is 100% available. What is wrong with my battery? If it were a new battery, it wouldn't be like that. I was really unhappy to see the result. I think I bought a refilled battery ain't I?