Hi. Kinda feel you, why ? Actually my s9+ has just suffered a back glass replacement and being I'm that timing I decided to also get a new original battery replacement for the phone. The think is even before the battery was and and, EXTREMELY POOR. Like I'm watching it draining abnormal even from doing the basic tasks. Also I'm that type of person what knows what to turn off that he's not using etc, nothing helps. I reset to factory didn't help, I wiped cache didn't help. I'm closing apps in the background but none of these help to fixing it. It just drains even for no reason. Let's not even talk about playing a game, you'll see then how fast it drains. Don't seem to find a way to fix it, I don't know if it's a software issue, was thinking to install the Android 8.0.0 to see if that makes any difference.
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