I am struggling with the battery back up. Huge charge consumed even it is idle. I am using for 7 days. 8/256 Exynos version. I have done everything such as: Background apps limitations. Do u have any suggestions?

1. Battery drains very fast than my other phone which is 4000 mah.2. Some apps are quite slow such as phone dialer. Name and number arises after 1-2 seconds.3. Network bar is not full even though other phones shows full network.4. Need call recorder...