That 101 is rather high.
That's why I again suggest Watch Dog Lite
Open it, tap cpu on upper right and it'll show what's running in foreground (using cpu, thus battery) and background (no cpu usage but open which is typical for Android)
In the screen shot it shows the app I mentioned in the foreground as I've set it to green, shows amount of cpu next to it and app size it its far right. White are ones are system apps , again wattcan be seen is their cpu usage. Once you see the one using your battery you can kill it, white list it or launch it by tapping the one you want to check. If it's an app gone rogue I'd suggest kill it and if it comes back on uninstall it .
Hope that helps. Gsam is too vague for me unless I dig very deeply,a time consuming task when terrible shooting something gone rogue.
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