Lava Mobiles — Battery getting discharged in 1 hour

Address:

Kolkata, West Bengal, 700033

Hi,

I have a Lava A79 mobile phone, which I bought during June 2016.
Initial 1.5 months the phone was working perfectly fine. But for the past 2 months, the phone started to get discharged within half a day, even with no usage. This problem has aggravated, and currently the phone gets discharged from 100% to 0% within 1 hour, with no usage.
Basically, we now have to keep it plugged in at all times!!
I have checked that there are no / very few apps running in the background. Is this a known problem with the battery?

Model: Lava A79
Serial # A79516EA007626
IMEI # [protected]
Android Version: 5.1

PLEASE HELP!!!

Regards,
Saumyo Mukherjee