I have been struggling with this same issue, have killed all unnecessary apps, cleared the cache, performed a factory reset and even tried a new battery, and still have an issue where after a ful...
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I have been struggling with this same issue, have killed all unnecessary apps, cleared the cache, performed a factory reset and even tried a new battery, and still have an issue where after a full charge, my battery would drain to around 90% in less than 30 minutes. Sometimes, even faster. It seems that nobody has been able to nail down a solution, so I attempted to contact Samsung to see what their suggestions might be. The conversation I had with an agent basically sums up like this: There's nothing they can do because they do not have reports of this issue and request that I send in my phone to be physically examined. So, Samsung basically told me to send it in and see if they can do anything about it. I don't have the insurance set up on my account, so I can't hold that in place, and I have no other way to get in touch with people and have a small child, so I can't exactly just mail off my phone for them to examine it. So, basically, Samsung is avoiding the issue and we still have no true resolution. If anyone has any other ideas, fixes, things I can attempt without having to send my phone in for someone to "examine", it would be greatly appreciated. Please note that I have deleted/uninstalled/cleared cache on many apps, finally completely reset the phone to factory settings and then tried a brand new battery, and the drainage is still extremely significant.