Snapdeal.com — Battery back up problem in lennovo k3 note mobile

Address:

249407

I purchase lennovo k3 note mobile from snap deal last month.
Battery low after full charge with in 3 to 4 hour without use. so how the process to change battery.
Battery is in under varrenty.
I request u to please change battery as soon as.
Lennovo mobile model no is - k50a 40
Purchasing date from snap deal -
30 may2016
Item code-db6103902
Order no.- [protected]
My contact no.[protected]
E mail id - [protected]@gmail.com