After Buying Samsung smartphones, many a times under the warranty period, the battery backup reduces and people have to go to Samsung service center to get batter replaced. However, some complaints have been found on Internet about the battery not working even after getting replaced in warranty period.
You need to complaint about this to the Samsung complaint service about Phones where you might get helped about battery replacement problem in Samsung smartphone.
Here are some of the contact information of Samsung care
Security Cameras / DVRs
Split System Air Conditioners