Someone else happens that when they update the Android version the battery lasts less, when I updated the S7 to Android 8, the same thing happened to me, is it normal?
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Yes it happens. They say it can take Android a couple of weeks to adjust for battery usage. Be sure that no 3rd party apps are draining your battery.
The S7 came out in 2015 ithas an old chip set so that is likely to happen.
Thanks, I do not have many applications that are active in the background, so I would wait for it to adjust