Battery drains suddenly from 18% to 5% , laptop hibernates

I bought a new Aspire E5-572G-525V laptop and using windows 8.1, but I am facing a battery issue.

Up to 20% the battery works fine and giving good backup, but I have noticed that whenever the battery level reaches below 20% (around 18%), the battery suddenly drops to 5%-critical level without giving a low battery indication and the laptop gets hibernate.

I have tried all the possible ways like to set the low level battery level indication in advanced battery options, re-installing the Microsoft battery driver etc. but nothing has worked.

Is the battery is defected or is it any hardware or software issue?