If we charge full. in the device maintainance it was showing 31hrs. Now if we full charge there it is showing 21hrs battery backup. What the hell is this?
You cannot. Android is smart enough to know how a person uses his phone. If you use your phone very hard, it will further drop. If you don't use your phone at all, it will increase.
"Thank you for Joining Samsung community. We would recommend taking some troubleshooting steps to further isolate what you may be experiencing. Find troubleshooting steps on provided link http://www.samsung.com/in/support/skp/faq/1101689. Please let the community know what steps you have taken and if you have noticed any changes or improvements. This will help the Community to provide you steps without repeating any steps you may have already taken. Be sure to hit ♡ when you find an answer that works for you."
