Samsung battery drain when stand by

GSam can sometimes be a little confusing -- it's reporting that your average screen on time per complete charge is 4.5 hours, which is completely normal. Is that usually the case for you?

To see if there's any discrepancy with GSam, can you show the screenshots from the phone's own Settings>Battery​ menu?
 
I'm not agree with you dear
Because i have samsung s5 prime last night its battery 31% after 8 hours in the morning the battery still 31%.
That's why i'm confuse with samsung grand prime plus battery stats.
 
It's very unusual for a battery not to drop after 8 hours, even if idle (unless you powered if off).

A battery drain of 7.8% per hour doesn't mean anything if we don't know what else the phone is doing. If it's completely idle, then I agree, that's abnormal. If you're using it relatively often, then it can be normal.
 
But 7.8% per hour is unusual for me because i used different kind of phones and i never faced these problems.
anyway my phone is in official warranty i will go to samsung support centre.
And again thanks for your effort...