Thanks for sharing your query. We would suggest you to visit nearby Samsung Service Center and they will let you know the time required for the battery replacement. Please find service center details in the link provided http://www.samsung.com/in/support/servicelocation
For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/ Be sure to hit ♡ when you find an answer that works for you.
